Self acting control systems in distribution networks

Self acting control systemsin distribution networks

C 01

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901

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MAIN VALVE

• Specific hydraulic profile• Range ND 1“1/2 to 300 mm

• High pressure cast iron• Tested and preset at assembly

Position indicatorwith purgeBrass and stainless steelHigh pressure

valve headCast iron with epoxy coating

Membrane EPDMreinforced

Reversible seat sealEPDM

Replaceablestreamlined seatStainless steel

Body drain plugBrass

High pressure valve housingCast iron with epoxy coating

Pressure reliefholes

Pressure reliefholes

Nutsand boltsStainless steel

3

WORKING PRINCIPLEPRESSURE REDUCING VALVE TYPE C 101

CLOSING

When the downstreampressure raises, the pilotG valve closes. Pressurein the upper chamberraises also and forcesthe membrane to closethe main valve A whichreproduces the move-ment of the pilot.

CLOSING

CONTROLLING

G

A

G

A

G

A

When the downstreampressure is too low, nopressure is acting on themembrane and the pilotG opens, pressure in theupper chamber is relea-sed and the valve Aopens reproducing themovement of the pilot.

The pilot G is set at agiven downstream pres-sure to be maintained. Ifthe pressure downstreamis higher than the settingpressure, the valve Aworks in closing phaseuntil the setting pressureis reached. When the downstreampressure is below the set-ting pressure the valveworks in opening phaseuntil the setting pressureis reached downstream.The upstream pressuremust be fairly higher thanthe setting pressure.

4

CONTROLLING DOWNSTREAM PRESSURE



C 101 C 101 C C 101 DS

Controls and maintains a constantpreset reduced downstream pres-sure regardless of variations indownstream demand or upstreampressure.This valve reduces :• distribution pressure when the supplycomes from a source situated at a relati-vely high level.• distribution pressure to a working levelfor a given zone.• the pressure at the discharge side of apump when it is too high.• pressure in an irrigation system.

Equipped with non-return valves (check valves) :• it closes automatically in case of areturn of water. (C 101 C)• it opens automatically to reverse thedirection of flow if the upstream pressurebecomes less than the downstream pres-sure. (C 101 DS)

Setting ranges :

0.34 to 5.51 bar

1.72 to 8.5 bar

2.06 to 27.52 bar

Equipped with two pilot valvesidentical to C 101, valve C 102controls and maintains a constantpreset reduced downstream pres-sure regardless of variations indownstream demand or upstreampressure. The addition of a secondpilot allows uninterrupted workingwhile servicing one of the pilots orease of change to a different pre-set pressure setting.This valve reduces :• distribution pressure when the supplycomes from a source situated at a rela-tively high level.

• distribution pressure to one or two wor-king levels for a given zone.• the pressure at the discharge side of apump when it is too high.• pressure in systems required to function atlow pressures (eg irrigation).

Setting ranges :

0.34 to 5.51 bar

1.72 to 8.5 bar

2.06 to 27.52 bar

Controls and maintains a constantpreset reduced downstream pres-sure regardless of variations indownstream demand or upstreampressure. The valve can open com-pletely if the upstream pressurefalls below a given level.This valve reduces :• distribution pressure when the supplycomes from a source situated at a relati-vely high level,• distribution pressure to a working levelfor a given zone,• the pressure at the discharge side of apump when it is too high,

• pressure in systems required to function atlow pressures (eg irrigation).

Provided with check valves :• it closes automatically in case of backflow.(C 108 C)

The same setting range for downs-tream pressure or open wide control :

0.14 to 2.41 bar1.72 to 8.6 bar6.89 to 17.24 bar

13.78 to 27.57 bar

C 101

C 101

C 101

C 101

C 108

C 102

C 108 C 108 C

For index of icones, see flap fold on the last page

5


Controls and maintains a constantpreset reduced downstream pressure together with a given ups-tream pressure whatever the varia-tions in downstream demand andupstream pressure.Equipped with non-return valves (checkvalves) it closes automatically in the eventof a return of water. (C 104 C)

Setting ranges :

Upstream pressure : 0.34 to 4.13 bar

1.72 to 7.57 bar2.06 to 17.22 bar

13.78 to 27.51 bar

Downstreampressure : 0.34 to 5.51 bar

1.72 to 8.5 bar2.06 to 27.52 bar

Controls and maintains a presetupstream pressure whatever thevariations in downstream demand.

This valve guarantees the maintenance of pressure upstream. It can also preventthe flow rate intake in a pump from fal-ling below a safe minimum. It preventsoverstretching of pumping capacity whenthe demand is too great.

Equipped with non-return valves (checkvalves) :

• it closes automatically in the event of areturn of water. (C 301 C)

• it opens automatically to reverse waterflow if the upstream pressure becomesless than the downstream pressure. (C 301 DS)

Setting ranges :


13.78 to 27.51 bar

Maintains a constant preset diffe-rential pressure across the valve oracross a pump.This valve allows :• the maintenance of a constant differen-tial pressure between two parts of a watersystem whatever the upstream pressure.• the maintenance of a constant differentialpressure between upstream and downstreamof a pump.Equipped with non-return valves (checkvalves) it closes automatically in the eventof a return of water. (C 306 C)

Setting ranges :


C 101C 301

C 301

C 306

C 104 C 104 C

CONTROLLING UPSTREAM PRESSURE

C 301 C 301 C C 301 DS

DIFFERENTIAL PRESSURE CONTROL

C 306 C 306 C


6

DISCHARGE VALVE

Installed on a bypass of the zoneto be protected, this valve openswhen the preset pressure is rea-ched. It stays open for as long asthe overpressure lasts and evacua-tes the surplus water into a tank, adrain or to a low pressure zone.Equipped with non-return valves (checkvalves) it closes in the event of a return ofwater in the discharge network.(C 401 C).

Setting ranges :


13.78 to 27.51 bar

Eliminates pressure fluctuationsdue to start up, shut down or fai-lure of a pump, or in case ofpower failure.This valve, always installed on a bypass,drains a certain volume of water towaste or back to the feeding reservoir.This may happen in two phases :a) the water hammer action creates inanticipation a drop in pressure which willrelease the corresponding volume ofwater.b) if effect is not sufficient, the valve willreact in real time to the following over-pressure.

• C 502 is similar to C 501 but the antici-pated surge protection pilot is replacedby a solenoïd valve.• C 503 is a combination of both C 501and C 502.

Setting ranges :


Generally installed on the mainline, this valve eliminates down-stream pressure surges and waterhammer during normal startingand stopping of a pump.This valve, whose control is integratedinto the electrical circuit of the pump,opens and closes at a slow, controlledspeed during start up and shut downphases of the pump.Set pressure depends on solenoid valve.

C 401

C 108

C 401

C 401 C 401 C

ANTI-WATER HAMMER VALVE

PUMP PROTECTION VALVE

C 501

C 601


7

WATER HAMMER PROTECTION VALVE

DN D H h Weight kg60 380 510 120 3065 380 510 120 3080 380 510 120 32

100 400 520 120 36125 570 550 130 65150 570 550 150 80200 690 700 180 120

PN 10 A PN 16

1. Adjustable setting screwin stainless steel

2. With seal3. Valve head in cast iron FGL 250

or steel (ND 150/200)4. Steel spring NCD5.6. Steel spring support7. Stainless steel stem8. Friction ring in PTFE9. Steel valve plug10. Valve plug sealing ring (polyurethane)11. Steel cover12. Stainless steel seat13. O-ring (NBR) nitrile rubber14. Steel flange15. Steel top plate16. Plug for manometer (1/4)17. Stainless steel boltPowder epoxy coated inside/outside

* Flange bolt holes PN 10, please indicate for PN 16 holes.

PN 25

REF. DN Spring Setting range Overpressure Flow ratein bars in bars L/s max.

5891DPN25 60 D 16 to 26 4,2 905892DPN25 65 D 16 to 26 4,2 905893DPN25 80 D 16 to 26 4,3 1505894DPN25 100 D 16 to 26 4,4 2805895DPN25 125 D 16 to 26 4,5 4005896DPN25 150 D 16 to 26 4,4 5505897DPN25 200 D 16 to 26 4,5 1200


REF. DN Spring Setting range Overpressure Flow ratein bars in bars L/s max.

5891 A 60 A 1 to 7 2,5 455891 B B 6 to 12 2,9 605891 C C 10 to 17 3,3 68

5892 A 65 A 1 to 7 2,5 455892 B B 6 to 12 2,9 605892 C C 10 to 17 3,3 68

5893 A 80 A 1 to 7 1,5 555893 B B 6 to 12 2,1 755893 C C 10 to 17 2,8 90

5894 A 100 A 1 to 7 2,2 805894 B B 6 to 12 2,7 1105894 C C 10 to 17 3,4 160

5895 A 125 A 1 to 7 2,3 1205895 B B 6 to 12 2,9 1605895 C C 10 to 17 3,5 200

5896 A 150 A 1 to 7 2,4 2005896 B B 6 to 12 3,2 2805896 C C 10 to 17 3,6 350

5897 A 200 A 1 to 7 2,7 5805897 B B 6 to 12 3,5 7505897 C C 10 to 17 4,5 900

AB 900

Its role is to protect systemsagainst surges (water hammer),whatever their source, by evacua-ting the water in excess straighta-way.

The mechanism consists of a springwhich is adjustable to the correctweighting to hold the valve firmly in place against its seat, keeping itwatertight.

When a pressure wave occurs this causescompression of the spring and the opening of the valve to allow evacuationof the water.

It should be noted that the stem (7) isdesigned to compensate for defect of alignment which could be caused by hydraulic pressure on the valve andby the force of the spring.

This avoids any instability and allows a self centering of the valve seat to centralize itself automatically whenwater passes.

8

PROGRESSIVE OPENINGAND CLOSUREPrevents overflowing and maintainsa constant level in a reservoir bymeans of a float tap. Opening andclosure are very gradual over thefew centimeters above and belowthe required level.This valve should preferably be installedat the foot of a reservoir or the top of a tank.Connecting pipe 10/12 mm from thefloat tap to the valve not included.(Must be adjusted on measure on site).

Identical to C 701, it guaranteesthe maintenance of sufficient upstream pressure while allowingthe reservoir to be filled when thenetwork permits. (diversion)Connecting pipe 10/12 mm from the pressure float tap to the valve notincluded.(Must be adjusted on measure on site).

Setting ranges :

Upstream pressure :0.34 to 4.13 bar1.72 to 7.57 bar2.06 to 17.22 bar

13.78 to 27.51 bar

Setting ranges :

Upstream pressure :0.34 to 4.13 bar1.72 to 7.57 bar2.06 to 17.22 bar

13.78 to 27.51 bar

NON-MODULATINGWORKS FULLY OPEN-FULLY CLOSEDValve controlled by a solenoidvalve connected to a float switch*.The solenoid (normally closed) isactivated when the float reachesthe low level ; it then re-closes atthe high level.

Regulated by volume not by level, this valveis suitable for night-time filling, since the"fullly open - fully closed" principle econo-mizes on energy in the case of supply by apump.

Equipped with non-return valves(check valves),• it closes automatically in the event of areturn of water. (C 707 C)• it guarantees the maintenance of sufficientupstream pressure while allowing the reser-voir to be filled when the pressure in the sys-tem allows it (C 727).Working pressure depends on solenoid valve.

C301

FLOAT VALVES

C 701

FLOAT VALVES

FLOAT VALVES

C 702

C 707 C 707 C C 727


* not included

9

Regulates the volume of water ina reservoir by means of a 2 posi-tion mechanical float. It closes ata preset high level and opens at agiven low level.Connecting tubes 4/6 mm to the floatare not supplied.(Must be adjusted on measure on site).

Setting ranges :

High and low level : 0 to 3.6 m

Identical to type C 717, it guaran-tees the maintenance of sufficientupstream pressure while allowingthe reservoir to be filled when thesystem pressure allows it.Connecting tubes 4/6 mm to the floatare not supplied.(Must be adjusted on measure on site).

Setting ranges :

High and low leve : 0 to 3.6 mUpstream pressure :


13.78 to 27.51 bar

C 306

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Installation typeC701 - C702C707 - C717

INSTALLATION EXAMPLESButterflyvalveSOCLA

GatevalveESCO

CheckvalveSOCLA

RubberexpansionjointsSOCLA

Pump Pressuregauge

FLOAT VALVES

C 717

C 737

FLOAT VALVES

A filter must be installed betweenthe butterfly valve and the regula-ting valve. If the circuit is uphill orhorizontal, include an air-valveupstream. If it is downhill, includean air-valve downstream.

10

PROGRESSIVE OPENING AND CLOSUREPrevents overflowing and main-tains a constant level in a storagetank or reservoir by means of apilot. Both opening and closureare very gradual over the fewcentimeters above and below therequired level.This type of valve should be used whenthe supply pressure is appreciably higher(about 1 bar) than the head developedby a full storage tank or reservoir.

Equipped with non-return valves (checkvalves)• it closes automatically should any waterreturn. (C 201 C)• it opens automatically to reverse waterflow if the upstream pressure becomesless than the downstream pressure. (C 201 DS)

Exists in top-fill or bottom-fill versions.Setting ranges :


ALTITUDE VALVE WITH 2 PILOTSRegulates the volume of water ina reservoir by means of twopilots. It closes at a preset highlevel and opens at a given lowlevel (minimum 1.5 m).It guarantees the maintenance of suffi-cient upstream pressure while permittingthe reservoir to be filled when the pres-sure in the system allows it. (C 227)Working pressure : 6 bar


High level : 0.13 to 2.4 bar2.1 to 6.2 bar

Low level : 0 to 0,69 bar0.14 to 2.41 bar1.72 to 6 bar

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C 205

PP

ALTITUDE VALVES WITH PILOTS

C 201 C 201 C C 201 DS

ALTITUDE VALVES WITH PILOTS

C 207 C 227


11

Controls and maintains a presetmaximum flow rate out of thevalve regardless of variations in upstream and downstreampressure.This valve can be used to control theflow from a pump into a distribution orirrigation system, or as a flow limiter tofeed a secondary system.Equipped with non-return valves (checkvalves) it closes automatically should anywater return. (C 901 C)

Controls and maintains a presetmaximum flow from the valve anda reduced downstream pressurewhatever the variations in up-stream pressure.Equipped with a non-return valve, it clo-ses automatically should water return. (C902 C)

Setting ranges :

Flow rates available : 1 m/s to 4,5 m/sDownstream pressure regulations :


13.78 to 27. b

Setting ranges :

Flow rates available : 1 m/s to 4,5 m/s

Controls and maintains a maxi-mum flow rate and the high waterlevel of a reservoir by means of a regulating pilot valve.Equipped with a non-return valve (check valve) it closes automaticallyshould water return. (C 903 C)


Flow rate range : 1 m/s to 4,5 m/sAltitude pressure ranges :


C 901

C 901C 101

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C 901 C 201PP

FLOW LIMITERS

C 901 C 901 C

FLOW LIMITERS

C 902 C 902 C

FLOW LIMITERS

C 903 C 903 C


12

Safety valve which closes in theevent of an unusual high speed ofwater downstream (protectsagainst the consequences of aburst in the system downstream).Re-set manually.

Setting ranges :

Flow rates range : 1 m/s to 4,5 m/s

Controls and maintains a maxi-mum flow rate at the valve outletand a preset upstream pressure.Equipped with a non-return valve (checkvalve) it closes automatically shouldwater return. (C 904 C).

Setting ranges :

Flow rate range : 1 m/s to 4,5 m/sUpstream pressure range :


13.78 to 27.57 bar

C 901C 401

C 906

FLOW LIMITERS

C 904 C 904 C

C 906


"OVER SPEED" VALVE

C 901

Installation typeC901C902C903C904/906

INSTALLATION EXAMPLESButterflyvalveSOCLA

GatevalveESCO

CheckvalveSOCLA


Pump Pressuregauge


13

C 801 : Electrically controlledvalve which is normally closed in the absence of power.Used whenever an on/off systemis required.

C 802 : Identical to C 801 butnormally open when switched off.Working pressure depends on solenoïdvalve.

This control valve functions as ahydraulic check valve whichopens and closes at a controllableand regulated speed, reducingsudden jumps in pressure.The speed of closure can be regulatedindependently from the speed of opening.Like a conventional non return-valve(check valve), it reduces sudden jumps inpressure should water return (C 1001 C).After pressure jumps have stopped, thenormal flow is restored progressively.

Installation typeC801C802

INSTALLATION EXAMPLES

ELECTRICALLY OPERATED VALVES

C 801 C 802

NON RETURN VALVE

C 1001 C


ButterflyvalveSOCLA

GatevalveESCO

CheckvalveSOCLA


Pump Pressuregauge


Pilot

14

OPTIONS*Available for all versions

OPTION 1*

Pressure gauges withpurge taps(10 bar, 16 bar, 25 bar)

OPTION 4*

Mechanical position indicator(indicates wether the valve isopen or closed) (6A/300V)

OPTION 3

Two-way solenoid valve

OPTION 5

OTHER OPTIONS

Motorized flow pilotType C900(Except C906)

OPTION 6

DROP BOX FOR TYPE C 101 : Connecting box for hydro-electroniccontrol.To be connected to the pilot for transferof information from electronic memory.(Electronic control not included).


• PILOT PIPING ASSEMBLY,- stainless piping system and pilot.

• FLANGES DRILLINGDIFFERENT FROM STANDARD.

ELECTRONICCONTROL

DROP BOX

CONTROL VALVE C 101

Upstreampressure PurgeSetting

pressureDownstream

pressure

15

MAIN VALVE : TECHNICAL INFORMATION

Size Mini m3/h Maxi m3/h m3/h L/s z

except C 900 C 900

1” 1/2 0,52 - 20,34 26,35 7,32 5,78

40 0,675 4,5 32,00 45,66 12,68 1,93

50 0,675 7 32,00 45,66 12,68 4,70

65 0,855 12 54,00 57,75 16,04 8,39

80 1,6 18 82,00 80,00 22,22 10,00

100 2,72 28 127,00 136,00 37,78 8,47

125 4,4 44 199,00 220,00 61,11 7,90

150 5,28 64 286,00 264,00 73,33 11,38

200 13,5 113 509,00 600,00 166,67 6,96

250 25,00 177 795,00 900,00 250,00 7,56

300 40,9 255 1145,00 1224,00 340,00 8,47

A control valve is a modulating valve which throttles depend-ing on the application to maintain a preset upstream ordownstream pressure, a preset flow, a preset fluid level...To correctly size this valve and avoid undesirable operatingcharacteristics (noise, excessive wear, poor regulation) whichresult from oversizing (or undersizing), use the sizing guideand choose the smallest valve size compatible with the indi-cated flow rates.NOTA :1 - For a throttling valve application requiring a large fluctu-

ant flow rate, a dual valve installation should be used.2 - The maximum flow rates listed above were calculated by

using a velocity of 4,5 m/second. The throttling valve iscapable of handling larger flows for short periods of time ;however, the increase in maximum flow should be limitedto 25% of the above values.

3 - For C900 series : min. flow 1m/s.

CAVITATION HEADLOSS CHART

A too large differential pressure and alow downstream pressure may result indamage to the valve by cavitation. Toavoid it, refer to the cavitation curve.

To avoid cavitation please refer to abovediagram and if needed reduce the diffe-rential pressure by installing and connec-ting two or more control valves in sameline (consult us).Stainless steel seat and counter seat arestandard

H

BC

E

A

HOW TO SELECT THE RIGHT SIZE KV FACTOR FLOW RATE/OPENING

CAVITATION CURVE

PRESSION AMONT

DO

WN

STR

EAM

PR

ESSU

RE

VALVE FULLY OPENED

DIMENSIONS (except type 900)

DIMENSIONS TYPES 901 - 902 - 903 - 904 - 906

Connection : flanges drilled (GN 10 - GN 16 - GN 25 : to be specified).

Minimum upstream pressure : 1 barTemperature maxi : 90°CVersion with flanges : PFA 25 if not indicatedThreaded version : 1”1/2 F/F except C900Vertical installation : on request

CAVITATION ZONE

(1) 78 / on flats

BC

ZZ

D

F9 9

9 910

DN A mm B mm C mm C mm Ø Ø F mm H mm Z mm Weight Ø 9” Ø 10”except C501 C501 D mm E mm kg

1” 1/2(F/F) 230 267 210 594 170 6 pans (1) - 55 254 8 1/4 1/440 230 285 210 594 170 152 23 55 254 12 1/4 1/450 230 285 210 594 170 161 23 55 254 13 1/4 1/465 290 352 257 641 200 185 24 76 254 21 3/8 1/480 310 372 272 565 217 200 26 90 254 26 3/8 3/8

100 350 423 302 686 241 235 28 90 254 39 3/8 3/8125 400 506 371 755 296 270 30 100 254 59 3/8 3/8150 480 551 401 905 363 300 20 100 254 73 3/8 3/8200 600 709 529 987 467 360 22 114 254 122 3/8 3/8250 730 844 631 1089 587 425 24 127 254 208 1/2 1/2300 850 975 730 1188 680 486 27 140 254 328 1/2 1/2

DN A mm B mm C mm Ø D mm Ø E mm F mm H mm Z mm Weight kg Ø 9” Ø 10”

40 274 285 210 170 152 23 55 254 15 1/4 1/450 274 285 210 170 161 23 55 254 16 1/4 1/465 314 352 257 200 185 24 76 254 24 3/8 1/480 334 372 272 217 200 26 90 254 29 3/8 3/8

100 374 423 302 241 235 28 90 254 42 3/8 3/8125 430 506 371 296 270 30 100 254 63 3/8 3/8150 512 551 401 363 300 20 100 254 77 3/8 3/8200 626 709 529 467 360 22 114 254 127 3/8 3/8250 760 844 631 587 425 24 127 254 218 1/2 1/2300 880 975 730 680 486 27 140 254 348 1/2 1/2

BORES FOR PRESSURE GAUGES

9 10

FLOW IN M3 /H

16


INSTALLATION EXAMPLESA filter must be installed between the butterfly valve and the regulating valve. If the circuit is uphill or horizontal, include an air-valve

upstream. If it is downhill, include an air-valve downstream.

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Installation type

C101 - C102C104 - C108

C 301

Installation typeC301

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Installation typeC205C201C207bottom filled

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Installation typeC201C205 - C207Top-filled

C 30

6


ButterflyvalveSOCLA

GatevalveESCO

CheckvalveSOCLA


Pump Pressuregauge

17


INSTALLATION EXAMPLES


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C 401



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C 401

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C 108

C 301Installation typeC501

C 306

A filter must be installed between the butterfly valve and the regulating valve. If the circuit is uphill or horizontal, include an air-valve upstream. If it is downhill, include an air-valve downstream.

ButterflyvalveSOCLA

GatevalveESCO

CheckvalveSOCLA


Pump Pressuregauge

COMPRESSEUR

C 401

C 601

18

CLEAR WATER AIR VALVES

VE 320

TRIPLE FUNCTION AIR VALVE FOR CLEAR WATERThis model ensures continuous andautomatic evacuation but also influxand release of air at a fast rate.

1. Valve housing in cast iron FGS 400-152. Float in PE (polyethylene)3. PVC closing head4. Polyamid retaining sleeve5. Large orifice sealing ring in polyurethane or NBR (nitrile)6. Small air orifice (stainless steel)7. Top plate (stainless steel)8. Air orifice seal (NBR nitrile)9. Valve cover (cast iron)10. Ball valve (optional)11. Drain plug (to check mechanism is in good

working order))12. Sheild profile13. Float guides14. Stainless steel screwsInterior/exterior epoxy coated.

WITH STOP VALVE

Ref. For pipe D H WeightPN 16 PN 25 DN diameter mm kg kgmm5884 5884PN25 40/50/60 ≤ 200 200 320 125885 5885PN25 65 ≤ 200 200 320 125886 5886PN25 80 ≤ 500 225 320 195887 5887PN25 100 ≤1000 255 370 22

Ref. For pipe D H WeightPN 16 PN 25 DN diameter mm kg kgmm5884R 5884RPN25 40/50/60 ≤ 200 200 460 135885R 5885RPN25 65 ≤ 200 200 460 13


1. FAST RELEASE OF AIRWhen a system is filled, the aircontained in the pipes must be eva-cuated.The primary function of the airvalve is therefore to allow a largequantity of air to be evacuated.Because in the beginning the pipesare full of air, the mobile float/valveseat assembly is resting on theshield profile.Thus the air can be evacuatedrapidly through the large orificewithout involving the float/valve seatmechanism.

2. RELEASING AIR UNDERPRESSURE

When the network is under pres-sure, the closing head stays flatagainst the seal. The float alonerises with the level of the waterbecause of the clearance gap inthe sleeve of the float.Thus, as air accumulates in the airvalve the float falls with the levelof the water which frees the smallorifice which acts as a drain. Thisevacuates the air.

3. RAPID INFLUX OF AIRDuring emptying or a burst in the system, there will be sudden loss of pressure in the pipework.The 3rd function is to allow a largequantity of air to enter in order toavoid problems associated withsuch a pressure loss. (Vacuumeffect).A rapid drop of water level occursin the pipework.The float/valve seat mechanismfalls to rest on the aerodynamicshield allowing the air to enter.

All water pipes carryair... This air may havebeen introduced atthe time the watersystem was filled, orduring maintenanceworks, but can alsoarise from the workingof pumps or dissolved air in reser-voirs...

The installation ofautomatic equipmentsuch as air valves andanti-water hammervalves allows most of the problems caused by air to beresolved.

19


3 FUNCTION AIR VALVESFOR WASTE WATERThis model functions in the same way as VE 320.The body of the valve is simply over-sizedto avoid contact between waste waterand the top part of the moving section.

WASTE WATER AIR VALVES

VE 330

1. Small orifice drain in stainless steel 2. Large orifice seal in polyurethane3. Support for the PVC seal4. Spindle in polyamide5. Cap in cast iron FGL 2506. Valve head in PVC7. Rod in polyamide8. Float in polyethylene9. Valve housing in steel10. Decompression valve11. Lifting rings12. Steel top plate13. Polyurethane drain seal14. Float guides in steelScrews in stainless steelSteel parts epoxy coated inside/outside

Ref. For pipe D H WeightPN 16 DN diameter mm kg kgmm

5888 80 80 to 200 325 580 35,55889 100 200 to 600 325 580 35,55890 150 > 600 360 650 55

Air valves are instal led at the high points of a piping system where air is accumulated.- Triple function air valves : at the highest levels- Single function air valves : at intermediary highpoints, between the triple function air valves.

DN 80 - 100 150

H mm 1,200 1,500

L x l mm 1,000 x 1,000 1,200 x 1,200

Air inlet (grille) mm 300 x 300 300 x 300

The air valves must be installed according to the following parameters.

VE 330

DN 50-40 / 60-65 80 100

H mm 1,100 1,200 1,300

L x l mm 600 x 600 600 x 600 600 x 600

Air inlet (filter) mm 150 x 150 200 x 200 300 x 300

VE 320

INSTALLATION

1. FUNCTION 2. FUNCTION 3. FUNCTION

FAST RELEASE OF AIR RELEASING AIR UNDERPRESSURE

RAPID INFLUX OF AIR

WHERE TO INSTALL AN AIR VAVLE

20

CLEAR WATER AIR VALVES

TECHNICAL PARAMETERSFLOW / PRESSURE GRAPHS

VE 120

SINGLE FUNCTION AIR VALVEFOR CLEAR WATERcontinuously and automaticallyevacuates accumulated air fromthe high points of installations.

RANGE AVAILABLE1. Air valve female thread 1"2. Air valve with flange

DN 40/50/60/65 mm3. Air valve with male thread nipple 1"4. Air valve with male ball stop valve 1"5. Air valve with ball stop valve flange

DN 40/50/60/651. Cast iron valve housingFGS 400-15 epoxy coatedinside/outside2. Float in polypheny-lene oxide (PPO)3. Cast iron valve head(FGS 400-15) epoxycoated4. Stainless steel filter5. Stainless steel clips6. Manual drain screw(brass)7. O-ring NBR (nitrile)8. Plug drain screw(brass)

9. O-ring NBR (nitrile)10. O-ring NBR (nitrile)11. Drain12. Drain nut (brass) 13. Float spindle (stain-less steel)14. Float seal NBR(nitrile)15. Washer16. Screw (stainless steel)17. Valve (nickel platedbrass)18. Cast iron flangeFGS 400-15 epoxycoated

DESCRIPTION PN16 PN25 CONNEC- A (mm) B TOTAL WEIGHTTIONS HEIGHT KgXX X

1) Air valve female thread 1" 2867 2868 1”F - 175 158 5,160

2) Air valve with flange DN 40/50/60/65 mm 2867BR 2868BR 40/50/60/65 185 175 216 8,400

3) Air valve with male thread nipple 1" 2867RM 2868RM 1”M - 175 192 5,300

4) Air valve with male ball stop valve 1" 2867VA 2868VA 1”M - 175 222 5,600

5) Air valve with ball stop valve 2867VB 2868VB 40/50/60/65 185 175 246 8,700flange DN 40/50/60/65

PN 2

5 -

PN 1

6 -

INLET PRESSURE(BAR)

Flow rate (Nm3/H)

VE 120

LARGEORIFICE

PRESSURE in m/WC

FLOW in L/s

SUCTION in m/WC

VE 320VE 330


PRESSURE in m/WC

SUCTION in m/WC

INLET AIR FLOW RATE

OUTLET AIR FLOW RATE

These graphs indicate the flow of air evacuated or sucked in by the largeorifice of the air valves.The choice of preset flow rate of the air valve is a function of the loss ofpressure which can be sustained by the system.

MAINTENANCEOF AIR VALVESTo check that an air valve isfunctioning correctly, simplyunscrew the drain plug :- a jet of water indicates thatthe apparatus i s work ingcorrectly.- an air leak under pressureindicates that the air valve isnot performing correctly andshould be cleaned.

Self acting control systems in distribution networks

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