Lowara Fixed speed Water Booster Sets with multistage Vertical Electric Pumps flow rates up to 400 m 3 /h GM20-GM21-GM30 GM20-GM21-GM30 GM20-GM21-GM30 GM20-GM21-GM30 GM20-GM21-GM30 GS21-GS30-GS31-GS40 GS21-GS30-GS31-GS40 GS21-GS30-GS31-GS40 GS21-GS30-GS31-GS40 GS21-GS30-GS31-GS40 Series Series Series Series Series 50 Hz 50 Hz 50 Hz 50 Hz 50 Hz
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Lowara
Fixed speedWater BoosterSetswith multistageVertical Electric Pumpsflow ratesup to 400 m3/h
GM - GS SERIESGM - GS SERIESGM - GS SERIESGM - GS SERIESGM - GS SERIESHYDRAHYDRAHYDRAHYDRAHYDRAULIC PERFORMANCE RANGE AULIC PERFORMANCE RANGE AULIC PERFORMANCE RANGE AULIC PERFORMANCE RANGE AULIC PERFORMANCE RANGE AT 50 HzT 50 HzT 50 HzT 50 HzT 50 Hz
PRINT 09-2006
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Range ...................................................................................................................................................55555
Electrical Data Table ..........................................................................................................................2121212121
GMD20, GMY20 Series ....................................................................................................................2323232323
GMD21, GMY21, GSD21, GSY21 Series ...........................................................................................3535353535
GMD30, GMY30, GSD30, GSY30 Series ...........................................................................................4343434343
GSD31, GSY31 Series ........................................................................................................................5151515151
GSD40, GSY40 Series .......................................................................................................................5959595959
Operating Characteristics at 50 Hz ...................................................................................................6666666666
GM/GS21 SETSGM/GS21 SETSGM/GS21 SETSGM/GS21 SETSGM/GS21 SETS• Fixed speed sets featuring two service pumps plus a jockey pump. Multistage vertical electric pumps, SV series, with up to 22 kW
power.
GM/GS30 SETSGM/GS30 SETSGM/GS30 SETSGM/GS30 SETSGM/GS30 SETS• Fixed speed sets featuring three multistage vertical service pumps, SV series, with up to 22 kW
power.
GS31 SETSGS31 SETSGS31 SETSGS31 SETSGS31 SETS• Fixed speed sets featuring three service pumps plus a jockey pump. Multistage vertical electric pumps, SV series, with up to 22 kW
power.
GS40 SETSGS40 SETSGS40 SETSGS40 SETSGS40 SETS• Fixed speed sets featuring four vertical service pumps, SV series, with up to 22 kW power.
RANGERANGERANGERANGERANGE• The GM/GS range of fixed speed water booster sets features models with 2 to 4 electric service pumps plus an additional jockey pump to
suit the specific requirements of different applications.
HeadHeadHeadHeadHead up to 150m.Flow rate Flow rate Flow rate Flow rate Flow rate up to 200 m3/h.
HeadHeadHeadHeadHead up to 150m.Flow rate Flow rate Flow rate Flow rate Flow rate up to 300 m3/h.
HeadHeadHeadHeadHead up to 150m.Flow rate Flow rate Flow rate Flow rate Flow rate up to 300 m3/h.
HeadHeadHeadHeadHead up to 150m.Flow rate Flow rate Flow rate Flow rate Flow rate up to 400 m3/h.
HeadHeadHeadHeadHead up to 150m.Flow rate Flow rate Flow rate Flow rate Flow rate up to 200 m3/h.
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SETS WITH FIXEDSETS WITH FIXEDSETS WITH FIXEDSETS WITH FIXEDSETS WITH FIXED-SPEED MOTORS AND PRES-SPEED MOTORS AND PRES-SPEED MOTORS AND PRES-SPEED MOTORS AND PRES-SPEED MOTORS AND PRESSURE SWITCH AND/OR ELECTRONIC PRESSURE SWITCH AND/OR ELECTRONIC PRESSURE SWITCH AND/OR ELECTRONIC PRESSURE SWITCH AND/OR ELECTRONIC PRESSURE SWITCH AND/OR ELECTRONIC PRESSURESURESURESURESURETRANSMITTRANSMITTRANSMITTRANSMITTRANSMITTER CONTROLTER CONTROLTER CONTROLTER CONTROLTER CONTROL
The starting and stopping of the pumps are determined based on the pressure values set on the pressureswitches (GMD/GMY) or electronic pressure control devices (GSD/GSY), to guarantee the required supplyof water. Each of these devices is connected to one or more pumps, with cyclic changeover. Thedifferential pressure is the difference between starting pressure and switch-off pressure. It is set at the
same value for all pumps.
On sets with jockey pump, starting and stopping are controlled by the first pressure switch (GMD/GMY)
or by the first threshold.
Figure 1 shows the operating principle of a three-pump booster set.
• On demand, water is drawn from the tank;
• When the pressure drops below the P1 setting, the first pump starts;• If the water consumption increases, the pressure drops further, causing the activation of the other
pumps in sequence and based on the demand (Q);• When consumption diminishes, the system pressure increases causing the pumps to stop based on the
pressure switch settings (one for each pump) or the pressure thresholds.• If consumption keeps diminishing, the pressure rises to the initial P15 value and the booster set is
switched off.
Note: the GS versions with pressure sensor enable the differential for each pump to be reduced to 0.5
Base Painted steel Painted steel Painted steel Painted steel
Electric pump body AISI 304 AISI 304 AISI 304 AISI 316
(*) of galvanized steel for two-pump sets up to 4kW gfixvsv16_2p-en_a_tm
MATERIAL
TTTTTABLE OF MAABLE OF MAABLE OF MAABLE OF MAABLE OF MATERIALS FOR SETS WITH SV2-4-8 PUMPSTERIALS FOR SETS WITH SV2-4-8 PUMPSTERIALS FOR SETS WITH SV2-4-8 PUMPSTERIALS FOR SETS WITH SV2-4-8 PUMPSTERIALS FOR SETS WITH SV2-4-8 PUMPSUP TO 4 kWUP TO 4 kWUP TO 4 kWUP TO 4 kWUP TO 4 kW
TTTTTABLE OF MAABLE OF MAABLE OF MAABLE OF MAABLE OF MATERIALS FOR SETS WITH SV33-46-66-92TERIALS FOR SETS WITH SV33-46-66-92TERIALS FOR SETS WITH SV33-46-66-92TERIALS FOR SETS WITH SV33-46-66-92TERIALS FOR SETS WITH SV33-46-66-92PUMPSPUMPSPUMPSPUMPSPUMPS
TTTTTABLE OF MAABLE OF MAABLE OF MAABLE OF MAABLE OF MATERIALS FOR SETS WITH SV8 PUMPSTERIALS FOR SETS WITH SV8 PUMPSTERIALS FOR SETS WITH SV8 PUMPSTERIALS FOR SETS WITH SV8 PUMPSTERIALS FOR SETS WITH SV8 PUMPSABOABOABOABOABOVE 4 kWVE 4 kWVE 4 kWVE 4 kWVE 4 kW
TTTTTABLE OF MAABLE OF MAABLE OF MAABLE OF MAABLE OF MATERIALS FOR SETS WITH SV16 PUMPSTERIALS FOR SETS WITH SV16 PUMPSTERIALS FOR SETS WITH SV16 PUMPSTERIALS FOR SETS WITH SV16 PUMPSTERIALS FOR SETS WITH SV16 PUMPS
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OPERAOPERAOPERAOPERAOPERATING CHARACTERISTICTING CHARACTERISTICTING CHARACTERISTICTING CHARACTERISTICTING CHARACTERISTICS AND LIMITSS AND LIMITSS AND LIMITSS AND LIMITSS AND LIMITS
P2 (kW) IEC G..20 G..30 G..40
0.37 71R <70 - -
0.55 71 <70 - -
0.75 80R <70 - -
1.1 80 <70 - -
1.5 90R <70 - -
2.2 90R <70 <70 71
3 100R <70 71 72
4 112R 70 72 73
5.5 132R 71 73 74
7.5 132R 72 74 75
11 160R 76 78 79
15 160 78 80 81
18.5 160 78 80 81
22 180R 78 80 81
gfix_2p-en_a_tr
50 Hz 2900 rpm LpA (dB ±2)
Liquids handled Water containing no gas or corrosive and/or aggressive substances.
Fluid temperature Above 0°C a + 40 °C
Ambient temperature Above 0°C a + 40 °C
Maximum operating pressure 16 bar
Minimum inlet pressure According to NPSH curve and losses, with a minimum margin of 0.5 m
Maximum inlet pressureThe inlet pressure added to the pressure of the pump at zero flow must be lower than the
maximum operating pressure of the set.
InstallationIndoors, protected from the weather. Away from heat sources. Max elevation 1000 m ASL.
Max humidity 50% without condensation.
Hourly starts
(single pump)
0,37 kW Pn 3 kW max 60 starts per hour. Direct motor start;
4 kW Pn 7,5 kW max 40 starts per hour. Direct motor start;
11 kW Pn 15 kW max 30 starts per hour. Star-delta motor start;
18,5 kW Pn 22 kW max 24 starts per hour. Star-delta motor start;Sound emission See table
SELECTING A SETSELECTING A SETSELECTING A SETSELECTING A SETSELECTING A SET
The first thing to do when selecting a set is to determine the quantity of water required and the pressure it must
supply.
CALCULACALCULACALCULACALCULACALCULATING THE FLTING THE FLTING THE FLTING THE FLTING THE FLOW RAOW RAOW RAOW RAOW RATETETETETE
• The quantity of water called water requirementwater requirementwater requirementwater requirementwater requirement depends on the type of users, e.g. homes, offices, schools,
as well as their number. The theoretic requirement is the total amount of water required by all the users. In actual fact, since it is very unlikely that there should be a simultaneous demand by all the users, the realrealrealrealreal
requirement requirement requirement requirement requirement is lower than the theoretic one.
CALCULACALCULACALCULACALCULACALCULATING THE HEADTING THE HEADTING THE HEADTING THE HEADTING THE HEAD
• The pressure required depends on the type of user. A number of factors must be taken into account, including the height of the building, the suction conditions and the flow resistance in the pipes.
SELECTING A BOOSTER SETSELECTING A BOOSTER SETSELECTING A BOOSTER SETSELECTING A BOOSTER SETSELECTING A BOOSTER SET
• According to the required flow rate and head values, it is possible to identify the most suitable type of electric pump. With the cyclic changeovercyclic changeovercyclic changeovercyclic changeovercyclic changeover function, duty assignment is rotated to ensure both pumps remain active and with even running hours, so wear is uniform and the use factor is reduced for longer pump life. This system also ensures continuity of operationcontinuity of operationcontinuity of operationcontinuity of operationcontinuity of operation in case one of the pumps needs maintenance. Moreover, the presence of a jockey pump maintains system pressure and ensures a modest supply of
• Frequent demand or small system lossessmall system lossessmall system lossessmall system lossessmall system losses determine pressure variations that may be compensated for by
using a pressure vessel.pressure vessel.pressure vessel.pressure vessel.pressure vessel. Correct selection of a diaphragm pressure vessel reduces the number ofreduces the number ofreduces the number ofreduces the number ofreduces the number of
pump starts pump starts pump starts pump starts pump starts and, if it is installed near the booster set, helps reduce the effect of water hammer.
The booster sets are readyreadyreadyreadyready for installation of diaphragm pressure vessel directly on the delivery manifold, and
additional tanks can be connected to the unused end of the manifold.
A simplified calculation methodsimplified calculation methodsimplified calculation methodsimplified calculation methodsimplified calculation method, developed from experience, is provided in the Appendix. It supplies
useful flow rate and head values for most common requirements, as well as a method for calculating
diaphragm pressure vessel size.
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CHARACTERISTICCHARACTERISTICCHARACTERISTICCHARACTERISTICCHARACTERISTICS OF THE ELECTRIC PUMPS USED INS OF THE ELECTRIC PUMPS USED INS OF THE ELECTRIC PUMPS USED INS OF THE ELECTRIC PUMPS USED INS OF THE ELECTRIC PUMPS USED INGM-GS SERIES BOOSTER SETSGM-GS SERIES BOOSTER SETSGM-GS SERIES BOOSTER SETSGM-GS SERIES BOOSTER SETSGM-GS SERIES BOOSTER SETS
• Multistage centrifugal vertical electric pumps. All metal parts in contact with liquid are made of stainless steel.• F version: round flanges, in-line discharge and suction ports, AISI 304.• N version: round flanges, in-line discharge and suction ports, AISI 316.• Reduced axial thrusts enable the use of standardstandardstandardstandardstandard motors motors motors motors motors that are easily found on the market. TheTheTheTheThe
Lowara surface motors have efficiency Lowara surface motors have efficiency Lowara surface motors have efficiency Lowara surface motors have efficiency Lowara surface motors have efficiency values that fall within the range values that fall within the range values that fall within the range values that fall within the range values that fall within the range
normally referred to as efficiency class 2normally referred to as efficiency class 2normally referred to as efficiency class 2normally referred to as efficiency class 2normally referred to as efficiency class 2.
• Mechanical seal according to EN 12756 (ex DIN 24960) and ISO 3069.• Easy maintenance. No special tools required for assembly or disassembly.• Pump suitable for handling potable Pump suitable for handling potable Pump suitable for handling potable Pump suitable for handling potable Pump suitable for handling potable water (WRAS certified) water (WRAS certified) water (WRAS certified) water (WRAS certified) water (WRAS certified).....
SV2, 4, 8, 16 ELECTRIC PUMPSSV2, 4, 8, 16 ELECTRIC PUMPSSV2, 4, 8, 16 ELECTRIC PUMPSSV2, 4, 8, 16 ELECTRIC PUMPSSV2, 4, 8, 16 ELECTRIC PUMPS
• Vertical multistage centrifugal pump with impellers, diffusers and outer sleeve made entirely of stainless steel, and with pump casing and upper head made of cast iron in the standard version.• N version made entirely of AISI 316 stainless steel.• High hydraulic efficiency for significant energy savings.• Innovative axial load compensation system on pumps with higher head. This ensures reduced axial thrusts and enables the use of standard motorsstandard motorsstandard motorsstandard motorsstandard motors that are easily found on the market. The Lowara surfaceThe Lowara surfaceThe Lowara surfaceThe Lowara surfaceThe Lowara surface motors have motors have motors have motors have motors have efficiency values that fallefficiency values that fallefficiency values that fallefficiency values that fallefficiency values that fall within the within the within the within the within the range normally referred torange normally referred torange normally referred torange normally referred torange normally referred to as efficiency class 2 as efficiency class 2 as efficiency class 2 as efficiency class 2 as efficiency class 2.
• Mechanical seal according to EN 12756 (ex DIN 24960) and ISO 3069, which can easily be replaced without disassembling the motor from the pump.• Mechanical sturdiness and easy maintenance. No special tools required for assembly or disassembly.• Pump suitable for handling potablePump suitable for handling potablePump suitable for handling potablePump suitable for handling potablePump suitable for handling potable
water (WRAS certified) water (WRAS certified) water (WRAS certified) water (WRAS certified) water (WRAS certified).
SV33, 46, 66, 92 ELECTRIC PUMPSSV33, 46, 66, 92 ELECTRIC PUMPSSV33, 46, 66, 92 ELECTRIC PUMPSSV33, 46, 66, 92 ELECTRIC PUMPSSV33, 46, 66, 92 ELECTRIC PUMPS
• The Lowara booster sets are marked CE in conformity with the following directives: - Machinery Directive 98/37/EC. - Low Voltage Directive 73/23/EEC and subsequent amendments. - Electromagnetic Compatibility Directive 89/336/EEC and subsequent amendments.
• Electric pump performances are declared to comply with the following standard:
ISO 9906-A Rotodynamic pumps – Hydraulic performance tests and acceptance criteria.
MAIN COMPONENTSMAIN COMPONENTSMAIN COMPONENTSMAIN COMPONENTSMAIN COMPONENTS
• Main On-off valvesMain On-off valvesMain On-off valvesMain On-off valvesMain On-off valves on suction and discharge side of each pump, ball type with threaded coupling up to 2" size included. Butterfly type for installation
between the flanges are used for larger diameters.
• Check valve Check valve Check valve Check valve Check valve on discharge side of each pump, spring-loaded type, with threaded coupling up to 1-1/2" size. Spring-loaded type for installation between the flanges are used for larger diameters. For applications with air-cushion surge tanks, they are mounted on the suction side and the set is equipped with a connector for G1/2" threaded flexible air feeder
pipe (GM..RA/GS..RA series).
• Suction manifoldSuction manifoldSuction manifoldSuction manifoldSuction manifold made of galvanized or AISI
304 stainless steel (PN16), with threaded or flanged ports depending on the type of pump (see drawings).
Threaded coupling for water charging.
• Delivery manifoldDelivery manifoldDelivery manifoldDelivery manifoldDelivery manifold made of galvanized or AISI 304 stainless steel (PN16), with threaded or flanged ports depending on the type of pump (see drawings). Fitted with two R1" threaded couplings with caps to allow connection of 24-litre diaphragm pressure
BASIC VERSION (STD)BASIC VERSION (STD)BASIC VERSION (STD)BASIC VERSION (STD)BASIC VERSION (STD)FFFFFor general applicationsor general applicationsor general applicationsor general applicationsor general applicationsSets with SV2-4-8 pumpsSets with SV2-4-8 pumpsSets with SV2-4-8 pumpsSets with SV2-4-8 pumpsSets with SV2-4-8 pumps:Nickel-plated brass valves, brass non-return valves,galvanized steel manifolds, plugs, caps and flanges.
Fitted with vibration damping feet.
Sets with SV16 pumps:Sets with SV16 pumps:Sets with SV16 pumps:Sets with SV16 pumps:Sets with SV16 pumps:Nickel-plated brass valves, non-return valves with
stainless steel flaps.
Sets with SV33-46-66-92 pumps:Sets with SV33-46-66-92 pumps:Sets with SV33-46-66-92 pumps:Sets with SV33-46-66-92 pumps:Sets with SV33-46-66-92 pumps:Valves with polyamide butterfly, non-return valves with
stainless steel flaps.
EU VERSIONEU VERSIONEU VERSIONEU VERSIONEU VERSIONSets with SV2-4-8 up to 4kWSets with SV2-4-8 up to 4kWSets with SV2-4-8 up to 4kWSets with SV2-4-8 up to 4kWSets with SV2-4-8 up to 4kW:::::Nickel-plated brass valves, brass non-return valves, AISI
304 stainless steel manifolds, plugs, caps and flanges.
Fitted with vibration damping feet.
DW VERSIONDW VERSIONDW VERSIONDW VERSIONDW VERSIONFFFFFor drinking water applications.or drinking water applications.or drinking water applications.or drinking water applications.or drinking water applications.The main components in contact with the liquid arecertified suitable for drinking water or are made of AISI304 or higher grade of stainless steel.
Fitted with vibration damping feet.
Sets with SV8 pumps, above 4 kWSets with SV8 pumps, above 4 kWSets with SV8 pumps, above 4 kWSets with SV8 pumps, above 4 kWSets with SV8 pumps, above 4 kW:::::Nickel-plated brass valves, nickel-plated brass non-
return valves.
Sets with SV16 pumps:Sets with SV16 pumps:Sets with SV16 pumps:Sets with SV16 pumps:Sets with SV16 pumps:Nickel-plated brass valves, non-return valves with
stainless steel flaps.
Sets with SV33-46-66-92 pumps:Sets with SV33-46-66-92 pumps:Sets with SV33-46-66-92 pumps:Sets with SV33-46-66-92 pumps:Sets with SV33-46-66-92 pumps:Valves with epoxy butterfly, non-return valves with
stainless steel flaps.
AISI 304, AISI 316 versionAISI 304, AISI 316 versionAISI 304, AISI 316 versionAISI 304, AISI 316 versionAISI 304, AISI 316 versionFFFFFor special applicationsor special applicationsor special applicationsor special applicationsor special applicationsManifolds, valves, non-return valves and maincomponents with parts directly in contact with thepumped liquid are made of AISI 304 or AISI 316stainless steel.
Fitted with vibration damping feet.
Accessories available on request:Accessories available on request:Accessories available on request:Accessories available on request:Accessories available on request:
• Devices against dry runningagainst dry runningagainst dry runningagainst dry runningagainst dry running in one of the following versions: - float switch, for positive suction head; - probe electrodes kit, for positive suction head;
- minimum pressure switch, for positive suction head.
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MAIN COMPONENTSMAIN COMPONENTSMAIN COMPONENTSMAIN COMPONENTSMAIN COMPONENTS
• Surge tankSurge tankSurge tankSurge tankSurge tank in the following versions: - Air-cushion surge tank with compressor and accessories for surge tank and compressor. - Diaphragm vessel as an alternative to the air-cushion
tank.
• Kit featuring a 24-litre diaphragmKit featuring a 24-litre diaphragmKit featuring a 24-litre diaphragmKit featuring a 24-litre diaphragmKit featuring a 24-litre diaphragm
expansion vessel expansion vessel expansion vessel expansion vessel expansion vessel with ball valve (one for each pump), in the following versions, depending on the maximum head of the pumps:- 24-litre 8 bar cylinder water vessel kit- 24-litre 10 bar cylinder water vessel kit
- 24-litre 16 bar cylinder water vessel kit
• Alarm kitAlarm kitAlarm kitAlarm kitAlarm kit;
• Air feederAir feederAir feederAir feederAir feeder for RARARARARA version;
• Air compressor Air compressor Air compressor Air compressor Air compressor for RA version.
Optional features:Optional features:Optional features:Optional features:Optional features:• Sets with weekly self-testing (I): there is a self-test circuit with a clock in the electrical panel. At a set time and day the pumps are activated for a set period of time. During the testing procedure, an electric valve discharges the water and the control circuit checks that the pressure stays at the factory-set value. In case
of malfunctions, an alarm is activated and memorized.
• Sets with non-return valves on suction side (RA).
• Electric panel equipped with voltmeter with switch and amperometer (VA).
• Electric panel with IP55 protection class.
• Dry contacts inside electrical panel for relay of pump
status control signals (CP).
• Two-pump sets with sensor control GS..20.
SPECIAL VERSIONS ON REQUESTSPECIAL VERSIONS ON REQUESTSPECIAL VERSIONS ON REQUESTSPECIAL VERSIONS ON REQUESTSPECIAL VERSIONS ON REQUEST(Contact the Commercial Service Centre)
• Sets without suction manifold (SCA).
• Sets with direct motor start up to 15 kW.• Sets with non-standard supply voltage, e.g. three- phase 3x230V, 3x440V.• Sets with single-phase supply voltage 1x230V.• Electrical panel with IP65 protection class.• Set with air compressor.• Different jockey pump from standard one shown in catalogue.• Mounting base made of AISI 304 / AISI 316 stainless steel.• Sets with one jockey pump and one service pump (GMD11/GSD11).
• Sets with 5 pumps GSD50, GSD41.
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CONTROL PCONTROL PCONTROL PCONTROL PCONTROL PANEL FOR GM20ANEL FOR GM20ANEL FOR GM20ANEL FOR GM20ANEL FOR GM20
Electrical panelElectrical panelElectrical panelElectrical panelElectrical panel for three-phase power supply, with steel
casing, equipped with:
• Main door-lock switch, fuse carrier and fuses, start
contactors and thermal protectors.
• Automatic/Manual/Off selector switches for each pump (inside panel).• Power ON, pump running, dry run shutdown, thermal
protector activation indicator lights.
• Automatic/manual mode pushbuttons and run/stop pushbuttons for each pump.• Cyclic changeover function (disablable).• Ready for installation of one of the following dry running protection devices: float switch, minimum pressure switch, external contact or electrode probes with sensitivity adjustment.• Delay timer for dry running protector cut-in, with 0 to 30 second adjustment.• Operation extension timer for each pump with 0 to 100 second adjustment.• Ready for internal installation of a relay board for the relay of the following signals: pump running, manual mode, thermal alarm, dry running and voltage presence.• Transformer for low voltage auxiliary circuit; 24V auxiliary voltage.
• Electronic card and control keypad (see figure).
CONTROL PCONTROL PCONTROL PCONTROL PCONTROL PANEL FOR ANEL FOR ANEL FOR ANEL FOR ANEL FOR GM21, GS21, GM30, GS30, GS31, GS40GM21, GS21, GM30, GS30, GS31, GS40GM21, GS21, GM30, GS30, GS31, GS40GM21, GS21, GM30, GS30, GS31, GS40GM21, GS21, GM30, GS30, GS31, GS40
Electrical panelElectrical panelElectrical panelElectrical panelElectrical panel for three-phase power supply, with steel
casing, equipped with:
• Main door-lock switch, fuse carrier and fuses, start contactors and thermal protectors.• Automatic/Manual/Off selector switches for each pump (inside panel).• Power ON, pump running, dry run shutdown, thermal protector activation indicator lights.• Automatic/manual mode pushbuttons and run/stop pushbuttons for each pump.• Cyclic changeover function (disablable).• Ready for installation of one of the following dry running protection devices: float switch, minimum pressure switch, external contact or electrode probes with sensitivity adjustment.• Operation extension timer for each pump with 0 to 100 second adjustment.• Transformer for low voltage auxiliary circuit; 24V auxiliary voltage.• Electronic control board with microprocessor, LCD and programming keypad (see figure).
Options:PA = Minimum pressure switch on suction sideCP = Dry contacts in panelVA = Electrical panel with voltmeter, amperometerIP55 = Electrical panel with IP55 protection
Versions:_ = Basic standard versionEU = European versionDW =Drinking water versionA316 = Special version AISI 316A304 = Special version AISI 304
Jockey pump code (if present)
Service pump code
_ = with check valve on discharge sideRA = with check valve on suction side
20 = 2 service pumps21 = 2 service pumps + 1 jockey pump30 = 3 service pumps31 = 3 service pumps + 1 jockey pump40 = 4 service pumps
_ = standardI = with self-test
Service pump electric startD = directY = star-delta
Series nameGM = pressure switch controlGS = pressure sensor control
SPECIAL VERSIONSSPECIAL VERSIONSSPECIAL VERSIONSSPECIAL VERSIONSSPECIAL VERSIONSSpecial versions featuring different materials/operating temperatures and electrical panels with additional
The table refers to performance with 4 pumps running
GS40/SV66-92 SERIES BOOSTER SETSGS40/SV66-92 SERIES BOOSTER SETSGS40/SV66-92 SERIES BOOSTER SETSGS40/SV66-92 SERIES BOOSTER SETSGS40/SV66-92 SERIES BOOSTER SETSHYDRAHYDRAHYDRAHYDRAHYDRAULIC PERFORMANCE TULIC PERFORMANCE TULIC PERFORMANCE TULIC PERFORMANCE TULIC PERFORMANCE TABLE AABLE AABLE AABLE AABLE AT 50 Hz (SERVICE PUMP)T 50 Hz (SERVICE PUMP)T 50 Hz (SERVICE PUMP)T 50 Hz (SERVICE PUMP)T 50 Hz (SERVICE PUMP)
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GM-GS20..40/SV2-16 SERIES BOOSTER SETSGM-GS20..40/SV2-16 SERIES BOOSTER SETSGM-GS20..40/SV2-16 SERIES BOOSTER SETSGM-GS20..40/SV2-16 SERIES BOOSTER SETSGM-GS20..40/SV2-16 SERIES BOOSTER SETSELECTRICAL DAELECTRICAL DAELECTRICAL DAELECTRICAL DAELECTRICAL DATTTTTA AA AA AA AA AT 50 HzT 50 HzT 50 HzT 50 HzT 50 Hz
TYPE Pn In TYPE Pn In GM20 GM/GS21 GM/GS30 GS31 GS40
The current shown is the nominal current of the set.
3 X 400 V 3 X 400 V 3 X 400V
SERVICE JOCKEY CURRENTPUMP PUMP ABSORBED BY SET
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GM-GS20..40/SV33-92 SERIES BOOSTES SETSGM-GS20..40/SV33-92 SERIES BOOSTES SETSGM-GS20..40/SV33-92 SERIES BOOSTES SETSGM-GS20..40/SV33-92 SERIES BOOSTES SETSGM-GS20..40/SV33-92 SERIES BOOSTES SETSELECTRICAL DAELECTRICAL DAELECTRICAL DAELECTRICAL DAELECTRICAL DATTTTTA AA AA AA AA AT 50 HzT 50 HzT 50 HzT 50 HzT 50 Hz
TYPE Pn In TYPE Pn In GM20 GM/GS21 GM/GS30 GS31 GS40
SV202F03T R 2" R 2" 360 439 252 301 672 800 550 610 658 98 517 640
SV203F03T R 2" R 2" 360 439 252 301 672 800 550 610 658 98 542 640
SV204F05T R 2" R 2" 360 439 252 301 672 800 550 610 658 98 589 640
SV205F07T R 2" R 2" 360 439 252 301 672 800 550 610 658 98 619 640
SV206F07T R 2" R 2" 360 439 252 301 672 800 550 610 658 98 644 640
SV207F11T R 2" R 2" 360 439 252 301 672 800 550 610 658 98 706 640
SV208F11T R 2" R 2" 360 439 252 301 672 800 550 610 658 98 731 640
SV209F11T R 2" R 2" 360 439 252 301 672 800 550 610 658 98 756 640
SV211F15T R 2" R 2" 360 439 252 301 672 800 550 610 658 98 816 640
SV212F15T R 2" R 2" 360 439 252 301 672 800 550 610 658 98 841 640
SV214F22T R 2" R 2" 360 439 252 301 672 800 550 610 658 98 891 640
SV402F03T R 2" R 2" 382 458 265 311 707 829 550 610 658 98 517 640
SV403F05T R 2" R 2" 382 458 265 311 707 829 550 610 658 98 564 640
SV404F07T R 2" R 2" 382 458 265 311 707 829 550 610 658 98 594 640
SV405F11T R 2" R 2" 382 458 265 311 707 829 550 610 658 98 656 640
SV406F11T R 2" R 2" 382 458 265 311 707 829 550 610 658 98 681 640
SV407F11T R 2" R 2" 382 458 265 311 707 829 550 610 658 98 706 640
SV408F15T R 2" R 2" 382 458 265 311 707 829 550 610 658 98 741 640
SV409F15T R 2" R 2" 382 458 265 311 707 829 550 610 658 98 766 640
SV411F22T R 2" R 2" 382 458 265 311 707 829 550 610 658 98 816 640
SV413F22T R 2" R 2" 382 458 265 311 707 829 550 610 658 98 866 640
SV414F30T R 2" R 2" 382 458 265 311 707 829 550 610 682 109 952 651
SV802F11T R 2"1/2 R 2"1/2 397 497 302 356 775 929 550 610 682 114 660 651
SV803F15T R 2"1/2 R 2"1/2 397 497 302 356 775 929 550 610 682 114 708 651
SV804F22T R 2"1/2 R 2"1/2 397 497 302 356 775 929 550 610 682 114 746 651
SV805F22T R 2"1/2 R 2"1/2 397 497 302 356 775 929 550 610 682 114 784 651
SV806F30T R 2"1/2 R 2"1/2 397 497 302 356 775 929 550 610 682 114 872 651
SV808F40T R 2"1/2 R 2"1/2 397 497 302 356 775 929 550 610 682 114 952 651
SV809F40T R 2"1/2 R 2"1/2 397 497 302 356 775 929 550 610 682 114 990 651
gmd20ra_sv_a_td
A CB D
TWOTWOTWOTWOTWO-PUMP BOOSTER SETS, GMD20 RA SERIES-PUMP BOOSTER SETS, GMD20 RA SERIES-PUMP BOOSTER SETS, GMD20 RA SERIES-PUMP BOOSTER SETS, GMD20 RA SERIES-PUMP BOOSTER SETS, GMD20 RA SERIESVERTICAL ELECTRIC PUMPS WITH NON-RETURN VVERTICAL ELECTRIC PUMPS WITH NON-RETURN VVERTICAL ELECTRIC PUMPS WITH NON-RETURN VVERTICAL ELECTRIC PUMPS WITH NON-RETURN VVERTICAL ELECTRIC PUMPS WITH NON-RETURN VALALALALALVEVEVEVEVEON SUCTION SIDEON SUCTION SIDEON SUCTION SIDEON SUCTION SIDEON SUCTION SIDE
Dimensions in mm, tolerance ± 10 mm.The /A316 versions have the same dimensions as the /A304 version.
25
Lowara
GMD 20 DNA DNM E H H1 H2
STD/UE A304 STD/UE A304 STD/UE A304 STD UE/A304
SV202F03T R 2" R 2" 252 301 321 346 633 707 550 610 658 98 517 640
SV203F03T R 2" R 2" 252 301 321 346 633 707 550 610 658 98 542 640
SV204F05T R 2" R 2" 252 301 321 346 633 707 550 610 658 98 589 640
SV205F07T R 2" R 2" 252 301 321 346 633 707 550 610 658 98 619 640
SV206F07T R 2" R 2" 252 301 321 346 633 707 550 610 658 98 644 640
SV207F11T R 2" R 2" 252 301 321 346 633 707 550 610 658 98 706 640
SV208F11T R 2" R 2" 252 301 321 346 633 707 550 610 658 98 731 640
SV209F11T R 2" R 2" 252 301 321 346 633 707 550 610 658 98 756 640
SV211F15T R 2" R 2" 252 301 321 346 633 707 550 610 658 98 816 640
SV212F15T R 2" R 2" 252 301 321 346 633 707 550 610 658 98 841 640
SV214F22T R 2" R 2" 252 301 321 346 633 707 550 610 658 98 891 640
SV402F03T R 2" R 2" 265 311 328 431 653 802 550 610 658 98 517 640
SV403F05T R 2" R 2" 265 311 328 431 653 802 550 610 658 98 564 640
SV404F07T R 2" R 2" 265 311 328 431 653 802 550 610 658 98 594 640
SV405F11T R 2" R 2" 265 311 328 431 653 802 550 610 658 98 656 640
SV406F11T R 2" R 2" 265 311 328 431 653 802 550 610 658 98 681 640
SV407F11T R 2" R 2" 265 311 328 431 653 802 550 610 658 98 706 640
SV408F15T R 2" R 2" 265 311 328 431 653 802 550 610 658 98 741 640
SV409F15T R 2" R 2" 265 311 328 431 653 802 550 610 658 98 766 640
SV411F22T R 2" R 2" 265 311 328 431 653 802 550 610 658 98 816 640
SV413F22T R 2" R 2" 265 311 328 431 653 802 550 610 658 98 866 640
SV414F30T R 2" R 2" 265 311 328 431 653 802 550 610 682 109 952 651
SV802F11T R 2"1/2 R 2"1/2 302 356 397 497 775 929 550 610 682 114 660 651
SV803F15T R 2"1/2 R 2"1/2 302 356 397 497 775 929 550 610 682 114 708 651
SV804F22T R 2"1/2 R 2"1/2 302 356 397 497 775 929 550 610 682 114 746 651
SV805F22T R 2"1/2 R 2"1/2 302 356 397 497 775 929 550 610 682 114 784 651
SV806F30T R 2"1/2 R 2"1/2 302 356 397 497 775 929 550 610 682 114 872 651
SV808F40T R 2"1/2 R 2"1/2 302 356 397 497 775 929 550 610 682 114 952 651
SV809F40T R 2"1/2 R 2"1/2 302 356 397 497 775 929 550 610 682 114 990 651
gmd20_sv_a_td
A CB D
TWOTWOTWOTWOTWO-PUMP BOOSTER SETS, GMD20 SERIES-PUMP BOOSTER SETS, GMD20 SERIES-PUMP BOOSTER SETS, GMD20 SERIES-PUMP BOOSTER SETS, GMD20 SERIES-PUMP BOOSTER SETS, GMD20 SERIESVERTICAL ELECTRIC PUMPS WITH NON-RETURN VVERTICAL ELECTRIC PUMPS WITH NON-RETURN VVERTICAL ELECTRIC PUMPS WITH NON-RETURN VVERTICAL ELECTRIC PUMPS WITH NON-RETURN VVERTICAL ELECTRIC PUMPS WITH NON-RETURN VALALALALALVEVEVEVEVEON DISCHARGE SIDEON DISCHARGE SIDEON DISCHARGE SIDEON DISCHARGE SIDEON DISCHARGE SIDE
Dimensions in mm, tolerance ± 10 mm.The /A316 versions have the same dimensions as the /A304 version.
26
Lowara
GMD 20 RA DNA DNM D H H1 H2 H3
STD/DW AISI STD/DW AISI STD/DW AISI
SV811F55T R 2"1/2 R 2"1/2 397 497 302 356 775 929 610 160 748 1199 973
Dimensions in mm. Tolerance ± 10 mm. gm20ra_sv8_a_td
Note: for versions with vibration damping feet increase height by 30 mm.
A B C
TWOTWOTWOTWOTWO-PUMP BOOSTER SETS, GMD20 RA SERIES-PUMP BOOSTER SETS, GMD20 RA SERIES-PUMP BOOSTER SETS, GMD20 RA SERIES-PUMP BOOSTER SETS, GMD20 RA SERIES-PUMP BOOSTER SETS, GMD20 RA SERIESVERTICAL ELECTRIC PUMPS WITH NON-RETURN VVERTICAL ELECTRIC PUMPS WITH NON-RETURN VVERTICAL ELECTRIC PUMPS WITH NON-RETURN VVERTICAL ELECTRIC PUMPS WITH NON-RETURN VVERTICAL ELECTRIC PUMPS WITH NON-RETURN VALALALALALVEVEVEVEVEON SUCTION SIDEON SUCTION SIDEON SUCTION SIDEON SUCTION SIDEON SUCTION SIDE
27
Lowara
GMD 20 DNA DNM D H H1 H2 H3
STD/DW AISI STD/DW AISI STD/DW AISI
SV811F55T R 2"1/2 R 2"1/2 302 356 397 497 826 986 610 160 748 1199 973
Dimensions in mm. Tolerance ± 10 mm. gm20_sv8_a_td
Note: for versions with vibration damping feet increase height by 30 mm.
A B C
TWOTWOTWOTWOTWO-PUMP BOOSTER SETS, GMD20 SERIES-PUMP BOOSTER SETS, GMD20 SERIES-PUMP BOOSTER SETS, GMD20 SERIES-PUMP BOOSTER SETS, GMD20 SERIES-PUMP BOOSTER SETS, GMD20 SERIESVERTICAL ELECTRIC PUMPS WITH NON-RETURN VVERTICAL ELECTRIC PUMPS WITH NON-RETURN VVERTICAL ELECTRIC PUMPS WITH NON-RETURN VVERTICAL ELECTRIC PUMPS WITH NON-RETURN VVERTICAL ELECTRIC PUMPS WITH NON-RETURN VALALALALALVEVEVEVEVEON DISCHARGE SIDEON DISCHARGE SIDEON DISCHARGE SIDEON DISCHARGE SIDEON DISCHARGE SIDE
28
Lowara
GHV 20 RA DNA DNM D H H1 H2 H3
STD/DW AISI STD/DW AISI STD/DW AISI
SV1602F22T R 3" R 3" 398 466 341 423 827 977 610 170 765 911 689
SV1603F30T R 3" R 3" 398 466 341 423 827 977 610 170 765 999 689
SV1604F40T R 3" R 3" 398 466 341 423 827 977 610 170 765 1041 689
SV1605F55T R 3" R 3" 398 466 341 423 827 977 610 170 765 1166 689
SV1606F55T R 3" R 3" 398 466 341 423 827 977 610 170 765 1204 689
SV1607F75T R 3" R 3" 398 466 341 423 827 977 610 170 765 1242 689
SV1608F75T R 3" R 3" 398 466 341 423 827 977 610 170 765 1280 689
Dimensions in mm. Tolerance ± 10 mm. ghv20ra_sv16_a_td
A B C
TWOTWOTWOTWOTWO-PUMP BOOSTER SETS, GMD20 RA SERIES-PUMP BOOSTER SETS, GMD20 RA SERIES-PUMP BOOSTER SETS, GMD20 RA SERIES-PUMP BOOSTER SETS, GMD20 RA SERIES-PUMP BOOSTER SETS, GMD20 RA SERIESVERTICAL ELECTRIC PUMPS WITH NON-RETURN VVERTICAL ELECTRIC PUMPS WITH NON-RETURN VVERTICAL ELECTRIC PUMPS WITH NON-RETURN VVERTICAL ELECTRIC PUMPS WITH NON-RETURN VVERTICAL ELECTRIC PUMPS WITH NON-RETURN VALALALALALVEVEVEVEVEON SUCTION SIDEON SUCTION SIDEON SUCTION SIDEON SUCTION SIDEON SUCTION SIDE
29
Lowara
GMD 20 DNA DNM D H H1 H2 H3
STD/DW AISI STD/DW AISI STD/DW AISI
SV1602F22T R 3" R 3" 341 423 398 466 827 977 610 170 765 726 689
SV1603F30T R 3" R 3" 341 423 398 466 827 977 610 170 765 814 689
SV1604F40T R 3" R 3" 341 423 398 466 827 977 610 170 765 856 689
SV1605F55T R 3" R 3" 341 423 398 466 827 977 610 170 765 981 973
SV1606F55T R 3" R 3" 341 423 398 466 827 977 610 170 765 1019 973
SV1607F75T R 3" R 3" 341 423 398 466 827 977 610 170 765 1057 973
SV1608F75T R 3" R 3" 341 423 398 466 827 977 610 170 765 1095 973
Dimensions in mm. Tolerance ± 10 mm. gm20_sv16_a_td
Note: for versions with vibration damping feet increase height by 30 mm.
A B C
TWOTWOTWOTWOTWO-PUMP BOOSTER SETS, GMD20 SERIES-PUMP BOOSTER SETS, GMD20 SERIES-PUMP BOOSTER SETS, GMD20 SERIES-PUMP BOOSTER SETS, GMD20 SERIES-PUMP BOOSTER SETS, GMD20 SERIESVERTICAL ELECTRIC PUMPS WITH NON-RETURN VVERTICAL ELECTRIC PUMPS WITH NON-RETURN VVERTICAL ELECTRIC PUMPS WITH NON-RETURN VVERTICAL ELECTRIC PUMPS WITH NON-RETURN VVERTICAL ELECTRIC PUMPS WITH NON-RETURN VALALALALALVEVEVEVEVEON DISCHARGE SIDEON DISCHARGE SIDEON DISCHARGE SIDEON DISCHARGE SIDEON DISCHARGE SIDE
30
Lowara
TWOTWOTWOTWOTWO-PUMP BOOSTER SETS, GMD20-GMY20 RA SERIES-PUMP BOOSTER SETS, GMD20-GMY20 RA SERIES-PUMP BOOSTER SETS, GMD20-GMY20 RA SERIES-PUMP BOOSTER SETS, GMD20-GMY20 RA SERIES-PUMP BOOSTER SETS, GMD20-GMY20 RA SERIESVERTICAL ELECTRIC PUMPS WITH NON-RETURN VVERTICAL ELECTRIC PUMPS WITH NON-RETURN VVERTICAL ELECTRIC PUMPS WITH NON-RETURN VVERTICAL ELECTRIC PUMPS WITH NON-RETURN VVERTICAL ELECTRIC PUMPS WITH NON-RETURN VALALALALALVEVEVEVEVEON SUCTION SIDEON SUCTION SIDEON SUCTION SIDEON SUCTION SIDEON SUCTION SIDE
31
Lowara
GMD20RA / GMY20RA DNA DNM A B C D E F G H H1 H2 H3
Note: for versions with vibration damping feet increase height by 50 mm. gm20ra_sv46_a_td16
TWOTWOTWOTWOTWO-PUMP BOOSTER SETS, GMD20-GMY20 RA SERIES-PUMP BOOSTER SETS, GMD20-GMY20 RA SERIES-PUMP BOOSTER SETS, GMD20-GMY20 RA SERIES-PUMP BOOSTER SETS, GMD20-GMY20 RA SERIES-PUMP BOOSTER SETS, GMD20-GMY20 RA SERIESVERTICAL ELECTRIC PUMPS WITH NON-RETURN VVERTICAL ELECTRIC PUMPS WITH NON-RETURN VVERTICAL ELECTRIC PUMPS WITH NON-RETURN VVERTICAL ELECTRIC PUMPS WITH NON-RETURN VVERTICAL ELECTRIC PUMPS WITH NON-RETURN VALALALALALVEVEVEVEVEON SUCTION SIDEON SUCTION SIDEON SUCTION SIDEON SUCTION SIDEON SUCTION SIDE
32
Lowara
TWOTWOTWOTWOTWO-PUMP BOOSTER SETS, GMD20-GMY20 SERIES-PUMP BOOSTER SETS, GMD20-GMY20 SERIES-PUMP BOOSTER SETS, GMD20-GMY20 SERIES-PUMP BOOSTER SETS, GMD20-GMY20 SERIES-PUMP BOOSTER SETS, GMD20-GMY20 SERIESVERTICAL ELECTRIC PUMPS WITH NON-RETURN VVERTICAL ELECTRIC PUMPS WITH NON-RETURN VVERTICAL ELECTRIC PUMPS WITH NON-RETURN VVERTICAL ELECTRIC PUMPS WITH NON-RETURN VVERTICAL ELECTRIC PUMPS WITH NON-RETURN VALALALALALVEVEVEVEVEON DISCHARGE SIDEON DISCHARGE SIDEON DISCHARGE SIDEON DISCHARGE SIDEON DISCHARGE SIDE
SV1602F22T R 3" R 3" 398 466 341 423 827 977 1040 170 765 726 973
SV1603F30T R 3" R 3" 398 466 341 423 827 977 1040 170 765 814 973
SV1604F40T R 3" R 3" 398 466 341 423 827 977 1040 170 765 856 973
SV1605F55T R 3" R 3" 398 466 341 423 827 977 1040 170 765 981 973
SV1606F55T R 3" R 3" 398 466 341 423 827 977 1040 170 765 1019 973
SV1607F75T R 3" R 3" 398 466 341 423 827 977 1040 170 765 1057 973
SV1608F75T R 3" R 3" 398 466 341 423 827 977 1040 170 765 1095 973
Dimensions in mm. Tolerance ± 10 mm. gm21ra_sv16_a_td
Note: for versions with vibration damping feet increase height by 30 mm.
A B C
TWOTWOTWOTWOTWO-PUMP BOOSTER SETS, GMD-PUMP BOOSTER SETS, GMD-PUMP BOOSTER SETS, GMD-PUMP BOOSTER SETS, GMD-PUMP BOOSTER SETS, GMD-GSD21 RA SERIES-GSD21 RA SERIES-GSD21 RA SERIES-GSD21 RA SERIES-GSD21 RA SERIESVERTICAL ELECTRIC PUMPS WITH JOCKEY PUMPVERTICAL ELECTRIC PUMPS WITH JOCKEY PUMPVERTICAL ELECTRIC PUMPS WITH JOCKEY PUMPVERTICAL ELECTRIC PUMPS WITH JOCKEY PUMPVERTICAL ELECTRIC PUMPS WITH JOCKEY PUMP,,,,,NON-RETURN VNON-RETURN VNON-RETURN VNON-RETURN VNON-RETURN VALALALALALVE ON SUCTION SIDEVE ON SUCTION SIDEVE ON SUCTION SIDEVE ON SUCTION SIDEVE ON SUCTION SIDE
37
Lowara
GMD 21 DNA DNM D H H1 H2 H3
GSD 21 STD/DW AISI STD/DW AISI STD/DW AISI
SV1602F22T R 3" R 3" 341 423 398 466 827 977 1040 170 765 726 973
SV1603F30T R 3" R 3" 341 423 398 466 827 977 1040 170 765 814 973
SV1604F40T R 3" R 3" 341 423 398 466 827 977 1040 170 765 856 973
SV1605F55T R 3" R 3" 341 423 398 466 827 977 1040 170 765 981 973
SV1606F55T R 3" R 3" 341 423 398 466 827 977 1040 170 765 1019 973
SV1607F75T R 3" R 3" 341 423 398 466 827 977 1040 170 765 1057 973
SV1608F75T R 3" R 3" 341 423 398 466 827 977 1040 170 765 1095 973
Dimensions in mm. Tolerance ± 10 mm. gm21_sv16_a_td
Note: for versions with vibration damping feet increase height by 30 mm.
A B C
TWOTWOTWOTWOTWO-PUMP BOOSTER SETS, GMD-PUMP BOOSTER SETS, GMD-PUMP BOOSTER SETS, GMD-PUMP BOOSTER SETS, GMD-PUMP BOOSTER SETS, GMD-GSD21 SERIES-GSD21 SERIES-GSD21 SERIES-GSD21 SERIES-GSD21 SERIESVERTICAL ELECTRIC PUMPS WITH JOCKEY PUMPVERTICAL ELECTRIC PUMPS WITH JOCKEY PUMPVERTICAL ELECTRIC PUMPS WITH JOCKEY PUMPVERTICAL ELECTRIC PUMPS WITH JOCKEY PUMPVERTICAL ELECTRIC PUMPS WITH JOCKEY PUMP,,,,,NON-RETURN VNON-RETURN VNON-RETURN VNON-RETURN VNON-RETURN VALALALALALVE ON DISCHARGE SIDEVE ON DISCHARGE SIDEVE ON DISCHARGE SIDEVE ON DISCHARGE SIDEVE ON DISCHARGE SIDE
38
Lowara
TWOTWOTWOTWOTWO-PUMP BOOSTER SETS, GMD..Y21-GSD..Y21 RA SERIES.-PUMP BOOSTER SETS, GMD..Y21-GSD..Y21 RA SERIES.-PUMP BOOSTER SETS, GMD..Y21-GSD..Y21 RA SERIES.-PUMP BOOSTER SETS, GMD..Y21-GSD..Y21 RA SERIES.-PUMP BOOSTER SETS, GMD..Y21-GSD..Y21 RA SERIES.VERTICAL ELECTRIC PUMPS WITH JOCKEY PUMPVERTICAL ELECTRIC PUMPS WITH JOCKEY PUMPVERTICAL ELECTRIC PUMPS WITH JOCKEY PUMPVERTICAL ELECTRIC PUMPS WITH JOCKEY PUMPVERTICAL ELECTRIC PUMPS WITH JOCKEY PUMP,,,,,NON-RETURN VNON-RETURN VNON-RETURN VNON-RETURN VNON-RETURN VALALALALALVE ON SUCTION SIDEVE ON SUCTION SIDEVE ON SUCTION SIDEVE ON SUCTION SIDEVE ON SUCTION SIDE
39
Lowara
TWOTWOTWOTWOTWO-PUMP BOOSTER SETS, GMD..Y21-GSD..Y21 RA SERIES-PUMP BOOSTER SETS, GMD..Y21-GSD..Y21 RA SERIES-PUMP BOOSTER SETS, GMD..Y21-GSD..Y21 RA SERIES-PUMP BOOSTER SETS, GMD..Y21-GSD..Y21 RA SERIES-PUMP BOOSTER SETS, GMD..Y21-GSD..Y21 RA SERIESVERTICAL ELECTRIC PUMPS WITH JOCKEY PUMPVERTICAL ELECTRIC PUMPS WITH JOCKEY PUMPVERTICAL ELECTRIC PUMPS WITH JOCKEY PUMPVERTICAL ELECTRIC PUMPS WITH JOCKEY PUMPVERTICAL ELECTRIC PUMPS WITH JOCKEY PUMP,,,,,NON-RETURN VNON-RETURN VNON-RETURN VNON-RETURN VNON-RETURN VALALALALALVE ON SUCTION SIDEVE ON SUCTION SIDEVE ON SUCTION SIDEVE ON SUCTION SIDEVE ON SUCTION SIDE
GMD21RA / GMY21RA DNA DNM A B C D E F G H H1 H2 H3
Note: for versions with vibration damping feet increase height by 50 mm. gm21ra_sv46_a_td16
40
Lowara
TWOTWOTWOTWOTWO-PUMP BOOSTER SETS,-PUMP BOOSTER SETS,-PUMP BOOSTER SETS,-PUMP BOOSTER SETS,-PUMP BOOSTER SETS, GMD..Y21-GSD..Y21 SERIES GMD..Y21-GSD..Y21 SERIES GMD..Y21-GSD..Y21 SERIES GMD..Y21-GSD..Y21 SERIES GMD..Y21-GSD..Y21 SERIESVERTICAL ELECTRIC PUMPS WITH JOCKEY PUMPVERTICAL ELECTRIC PUMPS WITH JOCKEY PUMPVERTICAL ELECTRIC PUMPS WITH JOCKEY PUMPVERTICAL ELECTRIC PUMPS WITH JOCKEY PUMPVERTICAL ELECTRIC PUMPS WITH JOCKEY PUMP,,,,,NON-RETURN VNON-RETURN VNON-RETURN VNON-RETURN VNON-RETURN VALALALALALVE ON DISCHARGE SIDEVE ON DISCHARGE SIDEVE ON DISCHARGE SIDEVE ON DISCHARGE SIDEVE ON DISCHARGE SIDE
Note: for versions with vibration damping feet increase height by 50 mm. gm21_sv46_a_td16
TWOTWOTWOTWOTWO-PUMP BOOSTER SETS,-PUMP BOOSTER SETS,-PUMP BOOSTER SETS,-PUMP BOOSTER SETS,-PUMP BOOSTER SETS, GMD..Y21-GSD..Y21 SERIES GMD..Y21-GSD..Y21 SERIES GMD..Y21-GSD..Y21 SERIES GMD..Y21-GSD..Y21 SERIES GMD..Y21-GSD..Y21 SERIESVERTICAL ELECTRIC PUMPS WITH JOCKEY PUMPVERTICAL ELECTRIC PUMPS WITH JOCKEY PUMPVERTICAL ELECTRIC PUMPS WITH JOCKEY PUMPVERTICAL ELECTRIC PUMPS WITH JOCKEY PUMPVERTICAL ELECTRIC PUMPS WITH JOCKEY PUMP,,,,,NON-RETURN VNON-RETURN VNON-RETURN VNON-RETURN VNON-RETURN VALALALALALVE ON DISCHARGE SIDEVE ON DISCHARGE SIDEVE ON DISCHARGE SIDEVE ON DISCHARGE SIDEVE ON DISCHARGE SIDE
Dimensions in mm. Tolerance ± 10 mm. gm30ra_sv16_a_td
Note: for versions with vibration damping feet increase height by 30 mm.
A B C
THREE-PUMP BOOSTER SETS, GMDTHREE-PUMP BOOSTER SETS, GMDTHREE-PUMP BOOSTER SETS, GMDTHREE-PUMP BOOSTER SETS, GMDTHREE-PUMP BOOSTER SETS, GMD-GSD30 RA SERIES-GSD30 RA SERIES-GSD30 RA SERIES-GSD30 RA SERIES-GSD30 RA SERIESVERTICAL ELECTRIC PUMPS WITH NON-RETURN VVERTICAL ELECTRIC PUMPS WITH NON-RETURN VVERTICAL ELECTRIC PUMPS WITH NON-RETURN VVERTICAL ELECTRIC PUMPS WITH NON-RETURN VVERTICAL ELECTRIC PUMPS WITH NON-RETURN VALALALALALVEVEVEVEVEON SUCTION SIDEON SUCTION SIDEON SUCTION SIDEON SUCTION SIDEON SUCTION SIDE
Dimensions in mm. Tolerance ± 10 mm. gm30_sv16_a_td
Note: for versions with vibration damping feet increase height by 30 mm.
A B C
THREE-PUMP BOOSTER SETS, GMDTHREE-PUMP BOOSTER SETS, GMDTHREE-PUMP BOOSTER SETS, GMDTHREE-PUMP BOOSTER SETS, GMDTHREE-PUMP BOOSTER SETS, GMD-GSD30 SERIES-GSD30 SERIES-GSD30 SERIES-GSD30 SERIES-GSD30 SERIESVERTICAL ELECTRIC PUMPS WITH NON-RETURN VVERTICAL ELECTRIC PUMPS WITH NON-RETURN VVERTICAL ELECTRIC PUMPS WITH NON-RETURN VVERTICAL ELECTRIC PUMPS WITH NON-RETURN VVERTICAL ELECTRIC PUMPS WITH NON-RETURN VALALALALALVEVEVEVEVEON DISCHARGE SIDEON DISCHARGE SIDEON DISCHARGE SIDEON DISCHARGE SIDEON DISCHARGE SIDE
46
Lowara
THREE-PUMP BOOSTER SETS, GMD..Y30-GSD..Y30 RA SERIESTHREE-PUMP BOOSTER SETS, GMD..Y30-GSD..Y30 RA SERIESTHREE-PUMP BOOSTER SETS, GMD..Y30-GSD..Y30 RA SERIESTHREE-PUMP BOOSTER SETS, GMD..Y30-GSD..Y30 RA SERIESTHREE-PUMP BOOSTER SETS, GMD..Y30-GSD..Y30 RA SERIESVERTICAL ELECTRIC PUMPS WITH NON-RETURN VVERTICAL ELECTRIC PUMPS WITH NON-RETURN VVERTICAL ELECTRIC PUMPS WITH NON-RETURN VVERTICAL ELECTRIC PUMPS WITH NON-RETURN VVERTICAL ELECTRIC PUMPS WITH NON-RETURN VALALALALALVEVEVEVEVEON SUCTION SIDEON SUCTION SIDEON SUCTION SIDEON SUCTION SIDEON SUCTION SIDE
47
Lowara
GMD30RA / GMY30RA DNA DNM A B C D E F G H H1 H2 H3
Note: for versions with vibration damping feet increase height by 50 mm. gm30ra_sv46_a_td16
THREE-PUMP BOOSTER SETS, GMD..Y30-GSD..Y30 RA SERIESTHREE-PUMP BOOSTER SETS, GMD..Y30-GSD..Y30 RA SERIESTHREE-PUMP BOOSTER SETS, GMD..Y30-GSD..Y30 RA SERIESTHREE-PUMP BOOSTER SETS, GMD..Y30-GSD..Y30 RA SERIESTHREE-PUMP BOOSTER SETS, GMD..Y30-GSD..Y30 RA SERIESVERTICAL ELECTRIC PUMPS WITH NON-RETURN VVERTICAL ELECTRIC PUMPS WITH NON-RETURN VVERTICAL ELECTRIC PUMPS WITH NON-RETURN VVERTICAL ELECTRIC PUMPS WITH NON-RETURN VVERTICAL ELECTRIC PUMPS WITH NON-RETURN VALALALALALVEVEVEVEVEON SUCTION SIDEON SUCTION SIDEON SUCTION SIDEON SUCTION SIDEON SUCTION SIDE
48
Lowara
THREE-PUMP BOOSTER SETS, GMD..Y30-GSD..Y30 SERIESTHREE-PUMP BOOSTER SETS, GMD..Y30-GSD..Y30 SERIESTHREE-PUMP BOOSTER SETS, GMD..Y30-GSD..Y30 SERIESTHREE-PUMP BOOSTER SETS, GMD..Y30-GSD..Y30 SERIESTHREE-PUMP BOOSTER SETS, GMD..Y30-GSD..Y30 SERIESVERTICAL ELECTRIC PUMPS WITH NON-RETURN VVERTICAL ELECTRIC PUMPS WITH NON-RETURN VVERTICAL ELECTRIC PUMPS WITH NON-RETURN VVERTICAL ELECTRIC PUMPS WITH NON-RETURN VVERTICAL ELECTRIC PUMPS WITH NON-RETURN VALALALALALVEVEVEVEVEON DISCHARGE SIDEON DISCHARGE SIDEON DISCHARGE SIDEON DISCHARGE SIDEON DISCHARGE SIDE
Dimensions in mm. Tolerance ± 10 mm. gs31ra_sv16_a_td
Note: for versions with vibration damping feet increase height by 30 mm.
A B C
THREE-PUMP BOOSTER SETS, GSD31 RA SERIESTHREE-PUMP BOOSTER SETS, GSD31 RA SERIESTHREE-PUMP BOOSTER SETS, GSD31 RA SERIESTHREE-PUMP BOOSTER SETS, GSD31 RA SERIESTHREE-PUMP BOOSTER SETS, GSD31 RA SERIESVERTICAL ELECTRIC PUMPS WITH JOCKEY PUMPVERTICAL ELECTRIC PUMPS WITH JOCKEY PUMPVERTICAL ELECTRIC PUMPS WITH JOCKEY PUMPVERTICAL ELECTRIC PUMPS WITH JOCKEY PUMPVERTICAL ELECTRIC PUMPS WITH JOCKEY PUMP,,,,,NON-RETURN VNON-RETURN VNON-RETURN VNON-RETURN VNON-RETURN VALALALALALVE ON SUCTION SIDEVE ON SUCTION SIDEVE ON SUCTION SIDEVE ON SUCTION SIDEVE ON SUCTION SIDE
Dimensions in mm. Tolerance ± 10 mm. gs31_sv16_a_td
Note: for versions with vibration damping feet increase height by 30 mm.
A B C
THREE-PUMP BOOSTER SETS, GSD31 SERIESTHREE-PUMP BOOSTER SETS, GSD31 SERIESTHREE-PUMP BOOSTER SETS, GSD31 SERIESTHREE-PUMP BOOSTER SETS, GSD31 SERIESTHREE-PUMP BOOSTER SETS, GSD31 SERIESVERTICAL ELECTRIC PUMPS WITH JOCKEY PUMPVERTICAL ELECTRIC PUMPS WITH JOCKEY PUMPVERTICAL ELECTRIC PUMPS WITH JOCKEY PUMPVERTICAL ELECTRIC PUMPS WITH JOCKEY PUMPVERTICAL ELECTRIC PUMPS WITH JOCKEY PUMP,,,,,NON-RETURN VNON-RETURN VNON-RETURN VNON-RETURN VNON-RETURN VALALALALALVE ON DISCHARGE SIDEVE ON DISCHARGE SIDEVE ON DISCHARGE SIDEVE ON DISCHARGE SIDEVE ON DISCHARGE SIDE
54
Lowara
THREE-PUMP BOOSTER SETS, GSD..Y31 RA SERIESTHREE-PUMP BOOSTER SETS, GSD..Y31 RA SERIESTHREE-PUMP BOOSTER SETS, GSD..Y31 RA SERIESTHREE-PUMP BOOSTER SETS, GSD..Y31 RA SERIESTHREE-PUMP BOOSTER SETS, GSD..Y31 RA SERIESVERTICAL ELECTRIC PUMPS WITH JOCKEY PUMPVERTICAL ELECTRIC PUMPS WITH JOCKEY PUMPVERTICAL ELECTRIC PUMPS WITH JOCKEY PUMPVERTICAL ELECTRIC PUMPS WITH JOCKEY PUMPVERTICAL ELECTRIC PUMPS WITH JOCKEY PUMP,,,,,NON-RETURN VNON-RETURN VNON-RETURN VNON-RETURN VNON-RETURN VALALALALALVE ON SUCTION SIDEVE ON SUCTION SIDEVE ON SUCTION SIDEVE ON SUCTION SIDEVE ON SUCTION SIDE
55
Lowara
GSD31RA / GSY31RA DNA DNM A B C D E F G H H1 H2 H3
Note: for versions with vibration damping feet increase height by 50 mm. gs31ra_sv46_a_td
THREE-PUMP BOOSTER SETS, GSD..Y31 RA SERIESTHREE-PUMP BOOSTER SETS, GSD..Y31 RA SERIESTHREE-PUMP BOOSTER SETS, GSD..Y31 RA SERIESTHREE-PUMP BOOSTER SETS, GSD..Y31 RA SERIESTHREE-PUMP BOOSTER SETS, GSD..Y31 RA SERIESVERTICAL ELECTRIC PUMPS WITH JOCKEY PUMPVERTICAL ELECTRIC PUMPS WITH JOCKEY PUMPVERTICAL ELECTRIC PUMPS WITH JOCKEY PUMPVERTICAL ELECTRIC PUMPS WITH JOCKEY PUMPVERTICAL ELECTRIC PUMPS WITH JOCKEY PUMP,,,,,NON-RETURN VNON-RETURN VNON-RETURN VNON-RETURN VNON-RETURN VALALALALALVE ON SUCTION SIDEVE ON SUCTION SIDEVE ON SUCTION SIDEVE ON SUCTION SIDEVE ON SUCTION SIDE
56
Lowara
THREE-PUMP BOOSTER SETS, GSD..Y31 SERIESTHREE-PUMP BOOSTER SETS, GSD..Y31 SERIESTHREE-PUMP BOOSTER SETS, GSD..Y31 SERIESTHREE-PUMP BOOSTER SETS, GSD..Y31 SERIESTHREE-PUMP BOOSTER SETS, GSD..Y31 SERIESVERTICAL ELECTRIC PUMPS WITH JOCKEY PUMPVERTICAL ELECTRIC PUMPS WITH JOCKEY PUMPVERTICAL ELECTRIC PUMPS WITH JOCKEY PUMPVERTICAL ELECTRIC PUMPS WITH JOCKEY PUMPVERTICAL ELECTRIC PUMPS WITH JOCKEY PUMP,,,,,NON-RETURN VNON-RETURN VNON-RETURN VNON-RETURN VNON-RETURN VALALALALALVE ON DISCHARGE SIDEVE ON DISCHARGE SIDEVE ON DISCHARGE SIDEVE ON DISCHARGE SIDEVE ON DISCHARGE SIDE
Note: for versions with vibration damping feet increase height by 50 mm. gs31_sv46_a_td
THREE-PUMP BOOSTER SETS, GSD..Y31 SERIESTHREE-PUMP BOOSTER SETS, GSD..Y31 SERIESTHREE-PUMP BOOSTER SETS, GSD..Y31 SERIESTHREE-PUMP BOOSTER SETS, GSD..Y31 SERIESTHREE-PUMP BOOSTER SETS, GSD..Y31 SERIESVERTICAL ELECTRIC PUMPS WITH JOCKEY PUMPVERTICAL ELECTRIC PUMPS WITH JOCKEY PUMPVERTICAL ELECTRIC PUMPS WITH JOCKEY PUMPVERTICAL ELECTRIC PUMPS WITH JOCKEY PUMPVERTICAL ELECTRIC PUMPS WITH JOCKEY PUMP,,,,,NON-RETURN VNON-RETURN VNON-RETURN VNON-RETURN VNON-RETURN VALALALALALVE ON DISCHARGE SIDEVE ON DISCHARGE SIDEVE ON DISCHARGE SIDEVE ON DISCHARGE SIDEVE ON DISCHARGE SIDE
Dimensions in mm. Tolerance ± 10 mm. gs40ra_sv16_a_td
Note: for versions with vibration damping feet increase height by 30 mm.
A B C
FOUR-PUMP BOOSTER SETS, GSD40 RA SERIESFOUR-PUMP BOOSTER SETS, GSD40 RA SERIESFOUR-PUMP BOOSTER SETS, GSD40 RA SERIESFOUR-PUMP BOOSTER SETS, GSD40 RA SERIESFOUR-PUMP BOOSTER SETS, GSD40 RA SERIESVERTICAL ELECTRIC PUMPS WITH NON-RETURN VVERTICAL ELECTRIC PUMPS WITH NON-RETURN VVERTICAL ELECTRIC PUMPS WITH NON-RETURN VVERTICAL ELECTRIC PUMPS WITH NON-RETURN VVERTICAL ELECTRIC PUMPS WITH NON-RETURN VALALALALALVEVEVEVEVEON SUCTION SIDE (UP TO 7,5 kW)ON SUCTION SIDE (UP TO 7,5 kW)ON SUCTION SIDE (UP TO 7,5 kW)ON SUCTION SIDE (UP TO 7,5 kW)ON SUCTION SIDE (UP TO 7,5 kW)
Dimensions in mm. Tolerance ± 10 mm. gs40_sv16_a_td
Note: for versions with vibration damping feet increase height by 30 mm.
A B C
FOUR-PUMP BOOSTER SETS, GSD40 SERIESFOUR-PUMP BOOSTER SETS, GSD40 SERIESFOUR-PUMP BOOSTER SETS, GSD40 SERIESFOUR-PUMP BOOSTER SETS, GSD40 SERIESFOUR-PUMP BOOSTER SETS, GSD40 SERIESVERTICAL ELECTRIC PUMPS WITH NON-RETURN VVERTICAL ELECTRIC PUMPS WITH NON-RETURN VVERTICAL ELECTRIC PUMPS WITH NON-RETURN VVERTICAL ELECTRIC PUMPS WITH NON-RETURN VVERTICAL ELECTRIC PUMPS WITH NON-RETURN VALALALALALVEVEVEVEVEON DISCHARGE SIDE (UP TO 7,5 kW)ON DISCHARGE SIDE (UP TO 7,5 kW)ON DISCHARGE SIDE (UP TO 7,5 kW)ON DISCHARGE SIDE (UP TO 7,5 kW)ON DISCHARGE SIDE (UP TO 7,5 kW)
Note: for versions with vibration damping feet increase height by 50 mm. gs40ra_sv46q_a_td16
FOUR-PUMP BOOSTER SETS, GSD40 RA SERIESFOUR-PUMP BOOSTER SETS, GSD40 RA SERIESFOUR-PUMP BOOSTER SETS, GSD40 RA SERIESFOUR-PUMP BOOSTER SETS, GSD40 RA SERIESFOUR-PUMP BOOSTER SETS, GSD40 RA SERIESVERTICAL ELECTRIC PUMPS WITH NON-RETURN VVERTICAL ELECTRIC PUMPS WITH NON-RETURN VVERTICAL ELECTRIC PUMPS WITH NON-RETURN VVERTICAL ELECTRIC PUMPS WITH NON-RETURN VVERTICAL ELECTRIC PUMPS WITH NON-RETURN VALALALALALVEVEVEVEVEON SUCTION SIDE (UP TO 7,5 kW)ON SUCTION SIDE (UP TO 7,5 kW)ON SUCTION SIDE (UP TO 7,5 kW)ON SUCTION SIDE (UP TO 7,5 kW)ON SUCTION SIDE (UP TO 7,5 kW)
Note: for versions with vibration damping feet increase height by 50 mm. gs40_sv46q_a_td16
FOUR-PUMP BOOSTER SETS, GSD40 SERIESFOUR-PUMP BOOSTER SETS, GSD40 SERIESFOUR-PUMP BOOSTER SETS, GSD40 SERIESFOUR-PUMP BOOSTER SETS, GSD40 SERIESFOUR-PUMP BOOSTER SETS, GSD40 SERIESVERTICAL ELECTRIC PUMPS WITH NON-RETURN VVERTICAL ELECTRIC PUMPS WITH NON-RETURN VVERTICAL ELECTRIC PUMPS WITH NON-RETURN VVERTICAL ELECTRIC PUMPS WITH NON-RETURN VVERTICAL ELECTRIC PUMPS WITH NON-RETURN VALALALALALVEVEVEVEVEON DISCHARGE SIDE (UP TO 7,5 kW)ON DISCHARGE SIDE (UP TO 7,5 kW)ON DISCHARGE SIDE (UP TO 7,5 kW)ON DISCHARGE SIDE (UP TO 7,5 kW)ON DISCHARGE SIDE (UP TO 7,5 kW)
Note: for versions with vibration damping feet increase height by 50 mm. gs40ra_sv46a_a_td16
FOUR-PUMP BOOSTER SETS,FOUR-PUMP BOOSTER SETS,FOUR-PUMP BOOSTER SETS,FOUR-PUMP BOOSTER SETS,FOUR-PUMP BOOSTER SETS, GSY40 RA SERIES GSY40 RA SERIES GSY40 RA SERIES GSY40 RA SERIES GSY40 RA SERIESVERTICAL ELECTRIC PUMPS WITH NON-RETURN VVERTICAL ELECTRIC PUMPS WITH NON-RETURN VVERTICAL ELECTRIC PUMPS WITH NON-RETURN VVERTICAL ELECTRIC PUMPS WITH NON-RETURN VVERTICAL ELECTRIC PUMPS WITH NON-RETURN VALALALALALVEVEVEVEVEON SUCTION SIDE (UP TO 7,5 kW)ON SUCTION SIDE (UP TO 7,5 kW)ON SUCTION SIDE (UP TO 7,5 kW)ON SUCTION SIDE (UP TO 7,5 kW)ON SUCTION SIDE (UP TO 7,5 kW)
Note: for versions with vibration damping feet increase height by 50 mm. gs40_sv46a_a_td
FOUR-PUMP BOOSTER SETS,FOUR-PUMP BOOSTER SETS,FOUR-PUMP BOOSTER SETS,FOUR-PUMP BOOSTER SETS,FOUR-PUMP BOOSTER SETS, GSY40 SERIES GSY40 SERIES GSY40 SERIES GSY40 SERIES GSY40 SERIESVERTICAL ELECTRIC PUMPS WITH NON-RETURN VVERTICAL ELECTRIC PUMPS WITH NON-RETURN VVERTICAL ELECTRIC PUMPS WITH NON-RETURN VVERTICAL ELECTRIC PUMPS WITH NON-RETURN VVERTICAL ELECTRIC PUMPS WITH NON-RETURN VALALALALALVEVEVEVEVEON DISCHARGE SIDE (UP TO 7,5 kW)ON DISCHARGE SIDE (UP TO 7,5 kW)ON DISCHARGE SIDE (UP TO 7,5 kW)ON DISCHARGE SIDE (UP TO 7,5 kW)ON DISCHARGE SIDE (UP TO 7,5 kW)
The booster sets are ready for installation, directly on the manifold, of 24-litre diaphragm tanks, one for eachpump. The sets are also equipped with caps to close off the unused couplings. Larger tanks can also be connectedto the unused end of the discharge manifold. For proper sizing of the tank please refer to the technical appendix.KitKitKitKitKit featuring the following accessories are available on requestavailable on requestavailable on requestavailable on requestavailable on request:
Manifolds up to 3" in diameter are usually supplied with threaded couplings and caps on unused end.Counterflange coupling kitsCounterflange coupling kitsCounterflange coupling kitsCounterflange coupling kitsCounterflange coupling kits made of zinc-plated or stainless steel are available on request.The counterflange kits are equipped with:
- threaded flange.- gasket and bolts/screws.- threaded counterflange (weld-on type for 3" diameter).
The anti-vibrating joints or compensation joints can be used in order to absorb deformations, expansions, noises inthe piping and to reduced ram blows. Moreover they can resist a high degree of empty that allows the absorptionof negative expansions for depression.Being of elastic material it can be become deformed and be dilated facilitating therefore the installation, that itbecomes simpler and fast, also in which the piping they are not aligned. It does not need assembly joints.
DRY RUNNING PROTECTION SYSTEMSDRY RUNNING PROTECTION SYSTEMSDRY RUNNING PROTECTION SYSTEMSDRY RUNNING PROTECTION SYSTEMSDRY RUNNING PROTECTION SYSTEMSDry run shutdown systems should be installed to protect the pumps in case of insufficient water supply.
The float switch protection system is used when the water supplycomes from open tanks. A float switch immersed in the tank isconnected to the electrical panel.If the water supply is insufficient, the float switch opens the
The electrode probe protection system is used when the watersupply comes from open tanks or wells. A set of three probes isconnected directly to the electronic board in the electrical panel.With the three electrodes immersed in the water, the relay on theelectronic board closes the contact, enabling the starting of thepumps. If the water supply is insufficient, the control circuit
opens the electric contact and the pumps stop running.
The minimum pressure switch protection system is used when thewater supply comes from water networks or pressurized tanks.The pressure switch is connected to the electronic board in theelectrical panel.If the water supply is insufficient, the pressure switch opens the
Determination of the water requirement depends on the type of users and contemporaneity factor. The calculationmay be subject to regulations, standards or customs that may vary from country to country. The calculation methodshown below is an example based on practical experience, designed to provide a reference value and not a substi-tute for detailed analytical calculation.
Water requirements in condominiums
The consumption table shows the maximum values for each delivery point, depending on the plumbing amenities.
MAXIMUM CONSUMPTION FOR EACH DELIVERY POINT
TYPE CONSUMPTION (l/min)
Sink 9Dishwasher 10Washing machine 12Shower 12Bathtub 15Washbasin 6Bidet 6Flush tank WC 6Controlled flushing system WC 90
G-at-cm_a_th
The sum of the water consumption values of each delivery point determines the maximum theoreticalrequirement, which must be reduced according to the contemporaneity coefficient, because in actual factthe delivery points are never used all together.
The table of water requirements in civil users shows the maximum contemporaneity flow-rate valuesbased on the number of apartments and the type of WC for apartments with one bathroom and two bath-rooms. As regards apartments with one bathroom, 7 drawing points have been taken into consideration, while 11points have been considered for apartments with two bathrooms. If the number of drawing points or apartments isdifferent, use the formulas to calculate the requirement.
( )NaNr857,0
1f
xx
=
( )NaNr857,0
1f
xx
=
( )NaNr545,0
03,1f
xx
=
( )NaNr727,0
8,0f
xx
=
Coefficient for apartments with one bathroom and flush tank WC
Coefficient for apartments with one bathroom and controlled flushing system WC
Coefficient for apartments with two bathrooms and flush tank WC
Coefficient for apartments with two bathrooms and controlled flushing system WC
f= coefficient; Nr= number of delivery points; Na= number of apartments
For seaside resorts, a flow rate increased by at least 20% must be considered. G-at-fi_a_th
FLOW RATE (l/min)
WITH FLUSH TANK WC WITH CONTROLLED FLUSHING SYSTEM WC
TABLE OF WATER REQUIREMENTS IN CIVIL USERS
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WATER REQUIREMENTS FOR COMMUNITY BUILDINGS
For seaside resorts, the flow rate must be increased by at least 20%.
1= Offices (N. of people)2= Department stores (N. of people)3= Nursing homes (N. of beds)4= Hotels, residences (N. of beds)
The requirements of buildings intended for specific uses, such as offices, residential units, hotels, depart-ment stores, nursing homes and so on, are different from those of condominiums, and both their globaldaily water consumption and the maximum contemporaneity flow rate are usually greater. The diagram ofwater requirements for community buildings shows the maximum contemporaneity flow rate of sometypes of communities, for guidance.These requirements must be determined case by case with the utmost accuracy, using analytical calculation methods,according to particular needs and local provisions.
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USE OF BOOSTER SETWater is usually delivered by public supply systems and the pressure is generally sufficient for the proper operationof the users’ water and sanitary equipment.
When this pressure is not sufficient, booster sets are employed to increase water pressure and ensure anacceptable minimum value at the furthest points. Therefore, the water supply to a building, group of buildings orto a system in general can be considered satisfactory when all the user points can deliver the required quantity ofwater.
Set connection methods (intake side)
Water can be supplied to a booster set in two ways:
1 - By installing a water storage tank between the user’s offtake and the booster set (indirect connection, fig.7.1.1).
2 - By connecting the booster set directly between the user’s offtake and the system (direct connection, fig. 7.1.1).
The indirect connection does not allow the water system pressure to be utilized. Therefore, it requires pumps withgreater head.
IThe direct connection allows the water system pressure to be utilized, provided the pressure fluctuation (∆p) doesnot exceed 1 bar.
If it does, a pressure reducer must be installed for proper operation of the booster set.
fig. 7.1.1
INDIRECT
DIRECT
SUPPLY
SUPPLY
USER’S OFFTAKE
(1) BY PIPE UNDER PRESSURE WE MEAN A WATER SYSTEM, A CLOSED TANK, ETC.(2) IN THE CASE OF A WATER SYSTEM INSTALL A CHECK VALVE (A) OR A DISCONNECTING DEVICE (B), UNLESS OTHERWISE PROVIDED BY LOCAL REGULATIONS
USER’S OFFTAKE
PRESSURE REDUCERIF ∆p > Ibar
WATER PIPEUNDER
PRESSURE(1)
WATER STORAGETANK
BOOSTER SET
BOOSTER SET
UTILISATION
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unfavourable drawing point (1.5 bar for valves and flush tank WC, and 2 bar for controlled flushing system WC).- At the most favourable drawing point, pressure must not exceed 5 bar.Once these parameters have been satisfied, in relation to the height of the building and to the set intakeconditions, the water supply system can have one of the following configurations:
fig. 7.1.2 fig. 7.1.3
fig. 7.1.4 fig. 7.1.5
SUPPLYSUPPLY
SUPPLY
SUPPLY
A) THE SET SERVES THE ENTIRE BUILDING
B) THE SET SERVES THE ENTIRE BUILDING, BUT THE LOWER FLOORS ARECONNECTED THROUGH A PRESSURE REDUCER SINCE THE PRESSURE TO THENEAREST UTILIZATION POINTS IS TOO HIGH
WATER PIPEUNDER PRESSURE
WATER PIPEUNDER PRESSURE
BOOSTERSET
BOOSTERSET
C) THE SET SERVES THE UPPER FLOORS, WHEREAS THE LOWER FLOORSARE SUPPLIED BY THE WATER PIPE UNDER PRESSURE
D) THIS CASE RESEMBLES THE PREVIOUS ONEEXCEPT THAT PRESSURE REDUCERS NEED TO BEINSTALLED ON SOME OF THE LOWER FLOORS
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DETERMINING THE HEAD OF THE SET AND INTAKECONDITIONS
Level intake
The delivery head of the set (H tot) is the sum of:- He : geodetic difference in level between the set
and the furthest delivery point.- Hc : flow resistance along all the pipes and
through other system components, such as valves,filters, etc..
- Hr : pressure required at the most unfavourable point.
H tot = He+Hc+Hr
Intake with positive head
In this case, the necessary delivery head (H tot) will bereduced by the inlet pressure value (Hi).
H tot = He+Hc+Hr- Hi
Intake with negative head
When the pumps suck from an underground tank or well,the necessary head will be increased by the value of theintake height (Ha):.
H tot = He+Hc+Hr+ Ha
In this case the intake height must be considered verycarefully, bearing in mind that an excessive difference inlevel between the water storage tank and the set, or thewrong sizing of the intake pipe, can have adverse effectson pump operation, such as cavitation and unpriming.
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NPSH
The minimum operating values that can be reached atthe pump suction end are limited by the onset ofcavitation.
Cavitation is the formation of vapour-filled cavitieswithin liquids where the pressure is locally reduced to acritical value, or where the local pressure is equal to, orjust below the vapour pressure of the liquid.
The vapour-filled cavities flow with the current andwhen they reach a higher pressure area the vapourcontained in the cavities condenses. The cavities collide,generating pressure waves that are transmitted to thewalls. These, being subjected to stress cycles, graduallybecome deformed and yield due to fatigue. Thisphenomenon, characterized by a metallic noiseproduced by the hammering on the pipe walls, is calledincipient cavitation.
The damage caused by cavitation may be magnified byelectrochemical corrosion and a local rise intemperature due to the plastic deformation of thewalls. The materials that offer the highest resistance toheat and corrosion are alloy steels, especially austeniticsteel. The conditions that trigger cavitation may beassessed by calculating the total net suction head,referred to in technical literature with the acronymNPSH (Net Positive Suction Head).
The NPSH represents the total energy (expressed in m.)of the liquid measured at suction under conditions ofincipient cavitation, excluding the vapour pressure(expressed in m.) that the liquid has at the pump inlet.
To find the static height hz at which to install themachine under safe conditions, the following formulamust be verified:
hp + hz ≥ (NPSHr + 0.5) + hf + hpv ➀
where:hp is the absolute pressure applied to the free liquid
surface in the suction tank, expressed in m. ofliquid; hp is the quotient between the barometricpressure and the specific weight of the liquid.
hz is the suction lift between the pump axis and thefree liquid surface in the suction tank, expressedin m.; hz is negative when the liquid level islower than the pump axis.
hf is the flow resistance in the suction line and itsaccessories, such as: fittings, foot valve, gatevalve, elbows, etc.
hpv is the vapour pressure of the liquid at theoperating temperature, expressed in m. of liquid. hpv is the quotient between the Pv vapourpressure and the liquid's specific weight.
0.5 is the safety factor.
The maximum possible suction head for installationdepends on the value of the atmospheric pressure(i.e. the elevation above sea level at which the pumpis installed) and the temperature of the liquid.
To help the user, with reference to water temperature(4°C) and to the elevation above sea level, thefollowing tables show the drop in hydraulic pressurehead in relation to the elevation above sea level, andthe suction loss in relation to temperature.
Flow resistance is shown in the tables at pages 103-104of this catalogue. To reduce it to a minimum,especially in cases of high suction head (over 4-5 m.)or within the operating limits with high flow rates, werecommend using a suction line having a largerdiameter than that of the pump's suction port.It is always a good idea to position the pump as closeas possible to the liquid to be pumped.
Make the following calculation:
Liquid: water at ∼ 15°C γ = 1 kg/dm3
Flow rate required: 10 m3/hHead for required delivery: 51 m.Suction lift: 4,5 m.The selection is an SV805 pump whose NPSH requiredvalue is, at 10 m3/h, 1.2 m.
For water at 15°C
hp = Pa = 10,33m, hpv = Pv = 0,174 m (0.01701 bar)γ γ
The Hf flow resistance in the suction line with footvalves is ~ 2 m.By substituting the parameters in formula (1) with thenumeric values above, we have:
TECHNICAL APPENDIX VAPOUR PRESSURE PS VAPOURPRESSURE AND ρ DENSITY OF WATER TABLE
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CHOOSING ANDSIZING THESURGE TANKThe purpose of the surge tank is to limit the number of hourly startsof the pumps, placing part of its stock of water, which is maintainedunder pressure by the air above it, at the disposal of the system.
The surge tank can be of the air cushion or diaphragm type.
In the air cushion version there is no clear separation between air andwater. Since part of the air tends to mix with water, it is necessary torestore it by means of air supply units or a compressor.
In the diaphragm version, neither air supply units nor compressor areneeded, as contact between air and water is prevented by a flexiblediaphragm inside the tank.
The following method, which is used to determine the volume of asurge tank, is valid both for horizontal and vertical surge tanks.
When calculation the volume of the surge tank, it is generallysufficient to consider the first pump only.
AIR-CUSHION SURGETANKIt is determined in relation to flow rate, pump pressure,, and numberof starts per hour allowed by the motor.
Va = 1,25 x Qp x (Pmax + 10)4 x Z x (Pmax - Pmin)
where:
Va = Total volume of the air-cushion surge tank in m3
Qp = Average pump flow rate in m3/hPmax = Maximum pressure setting (wcm)Pmin = Minimum pressure setting (wcm)Z = Maximum number of starts per hour allowed by the motor
Warning! By pump flow rate we mean the average between the flowrate at the maximum pressure switch setting (Qmax) and the flowrate at the minimum pressure switch setting (Qmin), i.e.:
DIAPHRAGM TANKIf you decide to use a diaphragm tank, the volume will be lower thanthat of the air-cushion tank. It can be calculated with the followingformula:
Vm = Qp x 14 x Z 1 - (Pmin - 2)
Pmax
where:
Vm = Total volume of the air-cushion surge tank in m3
Qp = Average pump flow rate in m3/hPmax = Maximum pressure setting (wcm)Pmin = Minimum pressure setting (wcm)Z = Maximum number of starts per hour allowed by the motor
hr = flow resistance for 100m of straight pipeline (m)V = water speed (m/s)
420 7000
600 10000
8000480
540 9000
210 3500
360 6000
240 4000
300 5000
180 3000
2000120
150 2500
250
1500
100060
90
75 1250
500
800
600
400
90
175
48
36
24
15
10,5
18 300
30
4,2 70
3 50
150
12 200
4,8 80
0,9 15
0,6 10
5,4
1,2 20
1,8 30
2,1 35
1,5 25
2,4 40
3,6 60
6 100
7,5 125
FLOW RATE NOMINAL DIAMETER in mm and INCHES
105 1750
42 700
54 900
9
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FLOW RESISTANCE
TABLE OF FLOW RESISTANCE IN BENDS, VALVES ANDGATES
The flow resistance is calculated using the equivalent pipeline length method according to thetable below:
The table is valid for the Hazen Williams coefficient C = 100 (cast iron pipework). For steelpipework, multiply the values by 1.41. For stainless steel, copper and coated cast iron pipework,multiply the values by 1.85.When the equivalent pipeline length has been determined, the flow resistance isobtained from the table of flow resistance.The values given are guideline values which are bound to vary slightly according to the model,especially for gate valves and non-return valves, for which it is a good idea to check the valuessupplied by the manufacturers.
Air supply unitThe most commonly used air supply unit model is the “depression” type, which uses the depression produced bythe pump suction.
fig. 7.2.2 - The air supply unit consists of a body made of plasticmaterial suitable for foodstuffs (1), a spherical rubbershutter (2), an upper brass union (3) with an air valve (4),a Venturi tube (5), and a flexible pipe (6) to be connectedto the pump intake.
fig. 7.2.5 - The air accumulated inside the body pushes the rubberball (2) to the bottom, thus blocking the passage. At thispoint the valve closes and the rubber ball prevents the airaccumulated inside the body of the air supply unit fromreaching the pump intake.
Air supply unit operation
fig. 7.2.3 - When the pump starts up, the intake pressure is lowerthan the pressure in the surge tank. This differencecauses water to flow from the surge tank to the pumpintake, through the air supply unit.
fig. 7.2.6 - When the pump stops the depression ceases and a flowof water is produced, which lifts the ball and pushes theair in the body of the supply unit into the tank.
fig. 7.2.4 - The flow of water that passes through theVenturi tube (5) generates a depression andallows the opening of the air valve (4). As aconsequence, air enters the body of the supplyunit.
Air supply unit selection tankTANK AVERAGE PRESSURE SETTING
CAPACITYbar
L 2,5 3,5 4,5 5,5 6,5 7,5
tab. 7.2.7
This cycle is repeated each time the pump starts up until the required quantity of air has accumulated. To ensure proper system operation, nocheck valve must be mounted between the pump delivery outlet and the surge tank, as it would impede the return flow of water through thepump.
2.5 3.5 4.5 5.5 6.5 7.5
100
200
300
500
700
1000
1500
2000
2500
3000
4000
5000
6000
g_air-en_a_th
TANK
CAPACITY
L
AVERAGE PRESSURE SETTING
bar
LOW 40
LOW 5
LOW 10
LOW 25
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ASSESSMENT OF PROBABLE DEMAND (VALID IN U.K. ONLY)
The method adopted is based on loading unit values as detailed in the Plumbing Engineering Design Guidepublished by the Institute of Plumbing.
When designing a hot or cold water supply system an assessment must be made to obtain the maximum probablesimultaneous demand.Depending on the type of services being provided it rarely occurs for all the appliances to be used at the same timetherefore the design usually allows for a peak usage which is less than the maximum.Probable demand will depend on, the type of building and its use, type of appliances installed and frequency ofuse.The simultaneous demand in most installations can be calculated with an adequate degree of accuracy using theloading unit concept.The usage patterns and types of appliances in different installations will vary greatly.Sports and Leisure centres for example are usually calculated directly by the flow rates of each appliance, withoutdiversity factors. Each case will need to be looked at in its own right and assessed accordingly. Judgement of thedesigner must prevail.
Loading unit values vary for each type of appliance. A loading unit has noprecise value in terms of litres per second. See loading unit table below.By multiplying the total number of each appliance by the appropriateloading unit number and adding the resultant totals together, therecommended flow can be read from chart.
Loading unit table
Working Example
A block of standard flats containing a total of 70 dwellings
Each standard flat is assumed to have: 1 x Hand basin hot & cold = 3 L/U x 70 = 2101 x WC cold only = 1.5 L/U x 70 = 1051 x Shower hot & cold = 10 L/U x 70 = 7001 x Sink hot & cold = 6 L/U x 70 = 420
Total Loading Unit =1435
This figure can now be read from chart opposite: total flow = 8.5 L/s
The head required in a boosted cold water system consists of three components, static head, residual pressureand system friction losses. The values of these three components are added together to give the total requiredhead at the system flow rate.
Static head (He): This is the difference between the breaktank low water line and the highest discharge point in thebuilding. If the height of the build is not known, then 2.8-3.0metres per floor can be used to assess the building height.
Residual pressure (Hr): This is the pressure required at thehighest outlet device, normally 20metres. Note: some modern showers may require higher pressures.
System friction losses (Hc): The total losses throughpipework, pipework fittings, valves, PRV’s and all otherequipment fed through the pumpset must be added to find thetotal system losses.On conventional systems that do not include excessive runs ofpipe or specialised components a rough guide would be to allow0.05 metres friction loss for each metre of static head.
Example:Static head (He): Building height four floors @ 2.8m each = 11.2m +Residual pressure (Hr): Pressure at highest outlet = 20m +Friction loses (Hc): 11.2 (static head) x 0.05 = 0.56mTotal pump head required (H) = 31.76m (3.11 Bar)
Pressure limitationsThe designer must ensure that adequate precautions are taken to ensure that the system is capable ofwithstanding the closed valve head produced by the pump set. In cases where closed valve pressures cannot betolerated, pressure reducing valvesshould be fitted down stream ofthe booster set.
VelocityPipework within the system shouldbe sized to limit the velocity to thefigures stated in table belowHigher velocities will lead toexcessive noise, ware and higherrunning costs
BOOSTER SIZING
What information do we require to size a booster set?
• As a minimum we need to know:– The total flow rate, or information to assess this.– The total head at flow rate, or the height of building.– If the pumps are to operate under positive head, or suction lift conditions.– Where the set is to be sited, I.E. basement or roof.– Preferred choice fixed or variable speed
• Additional information if available:– How to split the duty for particular applications I.E. duty/standby or duty/assist.– The size and material of the connecting pipework.– Is a Jockey pump required.
Hc
H
Hr
He
G_at_005_a
PIPE SIZE SUCTION PIPE DELIVERY PIPE
m/s m/sLess than 80mm 0,46 0,91 to 1,07100-150mm 0,55 1,22 to 1,52200mm 0,76 1,68250 and above 0,91 1,82 to 2,13