7/27/2019 Bombas de anel líquido http://slidepdf.com/reader/full/bombas-de-anel-liquido 1/8 OUR PRODUCTS CENTRIFUGAL PUMPS Liqui dRing& RotaryVaneVacuumPumpsandSystems For additional information, please call for a free brochure. 200 Newsome Drive Yorktown, VA 23692 Tel: 800-535-4243 757-988-3930 Fax: 757-988-3975 www.travaini.com Our Other Products Liquid Ring Vacuum Pumps: 3 CFM to 10,000 CFM Liquid Ring Compressors up to 110 psig Heat Transfer Pumps for hot thermal oils up to 600˚F (320˚C) Systems Package Vacuum Systems with Partial or Total Recirculation Customer Engineered Vacuum Solutions Liquid Ring & Rotary Vane Vacuum Pumps and Systems TRH-TRS-TRM-TRV LIQUID RING VACUUM PUMPS AND COMPRESSORS Capacity up to 2100 ACFM Vacuum to 29” Hg MULTISTAGE CENTRIFUGAL PUMPS HOT OIL PUMP SELF-PRIMING CENTRIFUGAL PUMPS
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Designed and manufactured utilizing ISO 9001 standcomponents is guaranteed for the selected workmanship and performance through scrupulous during production and final testing of finished produc
FE
WER CO
MP
ONENT
S
Through engineered innovations and co-opertechnologically advanced foundries, the pumps are mwith less components than typically required. Fewer the rigidity and toughness of the pumps, they ar
assemble and maintenance is greatly facilitated.
CO
MPACT DIMENSIONS
The conventional stuffing boxes construction is eliminaTravaini Pumps’ standard design.The shaft lengthreduced thus eliminating the potential danger for shaftand vibrations to the mechanical seals which would incand bearing wear.
STANDARD ME
CHANICAL SE
ALS
In keeping pace with today’s technology, Travaini standardized all pumps to accept unified mechanical s24960 standards. Also available upon request, are c
with double mechanical seals (tandem or back tocartridge type mechanical seals.
L
ARGE SELE
CTION OF MATERIALSIn addition to the standard materials, Travaini Pum
available with special materials such as Ni-Resist D2B or C, Uranus B6, etc.to meet specific applications.
MECH
ANICAL RELIABILIT
YWith the simple design of liquid ring pumps the
reciprocating parts, no valves or sliding vanes. The imonly rotating component with no metal-to-metal cooperation has minimal wear, vibration free and noisreduced.
Pumps series TRSCapacity = 5-2100 ACFMVacuum = 150-760 Torr
TRM/TRVCapacity = 5-300CFMVacuum = 25-760 Torr
LIQUID RING VACUUM PUMPS
SERIES TRH-TRS-TRM-
2
Pumps series TRHCapacity = 2-2100 ACFM
Vacuum = 25-760 Torr
Exploded view pump series TRH
Travaini Pumps, USA is one of the leadingworldwide manufacturers of liquid ring vacuumpumps with single stage (TRS), two stage (TRH),
and single stage variported (TRM/TRV) designs. With
the experience developed over decades of engineeringresearch, continual in the latest technologicallyadvanced machinery, and sound mechanical know-how,Travaini Pumps’ product is synonymous with highquality, high efficiency, robust construction and
Liquid Ring & Rotary Vane Vacuum Pumps and Systems
LIQUID HANDLING C
APABILIT
Y
Pumps are capable of handling high volumes of vapors,condensables and liquids, without detrimentalconsequences to their performance or their mechanical
reliability. Pump service liquid can be water or other liquidssuch as oils, solvents, etc. to satisfy almost any processrequirements.
DISCH
AR
GE OIL FREE AIR
With clean water as pump service liquid, the aspirated air(or gas) is “washed clean” within the pump.Contrary toother types of vacuum pumps the discharged air can becompletely free of any oils, carbon or plastic particles.
MOUNTING T
O NE
MA MOTORS
Travaini Pumps standard design may be base-mountedcoupled to standard NEMA Motors. Pumps up to 40 HPcan be close coupled to C or D flanged NEMA Motorsutilizing specially designed attachment flanges.This close-
coupled arrangement allows utilization of standard readilyavailable electric motors, eliminates lenghty alignmentprocedures and costly breakdowns associated withmisalignments. Overall dimensions are reduced andengineered baseplates are no longer required.
PRE
SSURE TO LES
S TH
AN 25 TORR
Liquid ring vacuum pumps, typeTRH/TRM/TRV in series with devices
such as ejector and/or vacuumboosters can operate at pressureslower than 1Torr.
TYPICAL CROSS SECTION OF A TWO STAGE VACUUM PUMPWITH MECHANICAL SEAL
C
OMP
ONENT
S
PART NO. DESIGNATION
106 Suc tion ca si ng107 Discharge cas ing110 Imp el le r c as ing140 Intermediate element147 Manifold210 Shaft230 1st s ta ge imp el le r
230.1 2nd s tage impel ler357.1 Bearing and mechanicalseal housing
PRINCIPLE OF OPERATIOGas entering via the suction port is conveyed impeller casing AB and trapped in the spacebetween two impeller blades.As the impeller - eccentrically to the liquid ring and casing - thvolume between the blades increases creatingvacuum.As the cycle progresses towards thedischarge port the volume decreases as the liqring creates compression.This compression countil the gas is discharged through the discharCD. A small amount of seal liquid is dischargethe gas and it is necessary to supply make-up
continuously.This make-up liquid also maintainliquid ring and absorbs the heat energy ofcompression.I = Suction phase II = Compression pha
When handling saturated air and/or using service liquid with temperature other than 15°C (59°F) the capacity will change substantially(see diagrams on page 16).The vacuum pumps can operate as compressors at a pressure 25 psi maximum higher than standard atmospheric pressure.For workingperformances contact our Sales Office.
Pu mp Ty pe RP M A CF M B HP ACF M BH P AC FM BH P ACF M BHP ACF M BH P AC FM B HP AC FM BHP GP MFlangSize
MotorPower
This data represents average values for pumps in standard and all iron materials of construction (GH, RZ, F), discharging against atmospheric pressure at sea level (760All stainless steel (A3) pumps have 10% less capacity. Capacity in ACFM subject to 10% tolerance handling dry air at 20°C (68°F) and using 15°C (59°F) water as liquid.When handling 100% saturated air capacity increases substantially (see diagrams on page 16).
Break horse power refers to water at 15°C (59°F), used as service liquid and tolerance 10%.(1) For detailed information pls consult the specific performance curves of the requested pump.
The performance data published for vacuum pumps is b ased on using water at 15°C (59°F) as the servicevapor pressure of the service liquid has a direct influence on pump capacity.The following diagrams allow to make corrections to the published data when using service water at temperathan 15°C (59°F).
T E M P E R A T U R E F A C T O R
ABSOLUTE PRESSURE
ABSOLUTE PRESSURE
SERVICE WATER TEMPERATURE
TWOSTAGEPUMP
L O W E S T A L L O
W A B L E
S U C T I O
N P R E S S U R E
Example of double spump that operates a22°C (71°F) sertemperature.The necessary capacto the published data (will be:
where Qty is tcapacity andobtained from
Qty
0.8
The performance data published for vacuum pumps are based on handling dry air at 20°C (68°F). When handling mixvapour the pump capacity will increase depending upon the air/vapour temperature as well as the service water temperatThese diagrams will allow the users to determine the condensing factors when handling saturated air at various temperatservice water at 15°C (59°F) or 25°C (77°F).For more detailed informations contact our Sales Office.
TECHNICAL INFORMATION
Example of two stapump that operates a40°C (104°F) satura25°C (77°F) sertemperature. The creferred to the publishpage 10) will be:
Where requeste2.1 the factor atempera(values odiagram
Qty
2.1x0.85 C O N D E N S
I N G F
A C T O R
AIR / VAPOUR MIXTURETEMPERATURE
USING 25¡C (77¡F) SERVICE WATER
Effect of service water temperature and saturated air on the capacity of liquid ring vacuum pump.
EVACUATION FROM A CLOSED VESSELTo determine necessary time to change the absolute pressure inside a closed vessel of rated volume (V)from P2 to P1 the following formula has to be used:
t = V x 60 x In P2 or Q = V x 60 x In P2
Q P1 t P1
PRIMING OF CENTRIFUGAL PUMPShe liquid ring vacuum pumps are used also for the priming of centrifugal pumps or similar.According to plant design the following formulas are to be used:
where:t = Requested t ime (minu tes)
V = Total volume to evacuate (f t3)Q = Capacity of the vacuum pump (ACFM)
P1 = Final pressure (Torr)P2 = Starting pressure (Torr)
In P2 = See below tableP1
where:t = Requested t ime (minu tes)
V1 = Total volume of piping (ft3)
V2 = Total volume of vertical piping (ft3)
V3 = Total volume of horizontal piping (ft3)
P1 = Absolute pressure (Torr) at the suction of the pump when the piping is full(generally using water is: ~ barometric pressure [Torr] - H [m] x 98)
P2 = Starting absolute pressure (mbar) inside the piping before priming(generally is the barometric pressure)
Q = Capacity of vacuum pump (ACFM)
In P2 = See below tableP1
a) t = V1 x 60 x 2 - P1 x In P2Q P1 - P2 P1
b) t = V2 x 60 x 2 - P1 x In P2 + V3 In P2 1Q P1 - P2 P1 Q P1
Note: The above mentioned formulas are applied when the capacity (Q) of vacuum pump between P2 P1 is constant: if this is not possible, it is necessary tosplit calculation in more steps where the capacity (Q) could be considered constant.
( )
( ( ))
Towards the vacuum pump
T o w a r d s t h e v a c u u m p
u m p
Towards the vacuum pump
LOGARITHMIC TABLE BAROMETRIC PRESSURE VARIATION R ELATED TO ALTITUDE
N a t u r a l l o g a r i t h m
I n
P2
P1
6
4
3
2
1
0,7
0,3
0,5
0,2
1 2 4 6 10 20 40 60 100 300
Pressure ratio
20000
15000
10000
5000
0
50060070080090010001013
6000
5000
4000
3000
2000
1000
0
mbar
A l t i t u d e i n m e t e r s
A l t i t u d e
i n
f e e t
Absolute pressure
TECHNICAL DATA UNIT CONVERSION AND TECHNICAL DATA FOR V
Installed in place of thedischarge manifold to separate the seal
liquid from the gas.Supplied with pipes andfittings for partial recycle and drain connection.
Available in carbon steel or s tainless steel AISI 316.
PUMP MOUNTED SEPARATOR
Installed on the discharge branch it separates thegas/liquid. Complete with pipes and fittings forpartial recycle drain. Available in carbon steel andstainless steel AISI 316.
FREE STANDING SEPARATORFOR FULL RECOVERY SYSTEM
Affords excellent separation of gas/liquid mixture.Essential when the seal liquid is recycled a closecircuit and cooled by a heat exchanger.Suppliedcomplete with level gauge, thermometer drain valve,excess liquid drain valve and connection for pressuregauge.Available in carbon steel and stainless steelAISI 316.
NON-RETURN VALVE WITH LOW PRESSURE DROP
Installed between the suction flange and thecounter flange of the suction pipe.Preventsbackflow into the system in the event of the pumpstopping.It has a very low pressure drop andideal for higher vacuum conditions. Available in avariety of materials.
ATMOSPHERIC AIR (or gas)OPERATED EJECTOR.
Provided when suction pressure below 25 Torrare required.Will o perate down to 5 Torr.Installed on the suction branch and utilizes airfrom the atmosphere as motive air.Available ina variety of materials.
AUTOMATIC DRAIN VALVE
Provided to drain the pump casing down to thecentre line when the pump is stopped.Preventsstarting the pump with the casing full of sealliquid and avoids heavy starting loads.Available in brass with nitrile seal ring.
VACUUM RELIEF VALVE
A manually adjustable safety valve.Used tocontrol the degree of vacuum and assist in theprevention of cavitation.
VALVE
Installed in the seal liquid supply pipe in theplace of regulating valves.Ensures the correctamount of seal liquid is supplied to the pumpirrespective of the supply pressure.Effectseconomies in the quantity of seal liquid.
VACUUM GAUGES,PRESSURE GAUGESAND COMPOUND GAUGES
TRAVAINI PUMPS USA
REGIONAL SALES LOCATIONS
Liquid Ring & Rotary Vane Vacuum Pumps and Systems
Continuing research of TRAVAINI PUMPSUSA results in product improvements; therefore any specifications may be subject to change without notice.