Products > Special pumps >  TRAVAINI Italy, liquid ring vacuum pumps

Pompetravaini was born in the distant past of 1929, through the entrepreneurship of its founder Carlo Travaini, father of the present President Engineer Mario Travaini.  The company produces liquid ring vacuum pumps and systems, centrifugal pumps for diathermic oils and a very wide range of centrifugal pumps for capacities up to 2000 m3/h and pressures up to 64bars. For more detailed information you can visit the company's site here.

You can also have a brief overview of the whole production range by downloading the pdf file

1 Shaft
2 Air inlet
3 Blade
4 Impeller
5 Liquid ring
6 Air outlet

The shaft is eccentrically fitted inside the pump's body. It is neccessry to feed the pump with service liquid (usually water). While the pump is rotating and due to the centrifugal force, the service liquid forms a liquid ring, concentric with the pump's body. Incomming air is trapped within the impeller's blades and the liquid ring. Air is gradually compressed and is finally expelled towards the pump's outlet.

Due to the compression of th air, the temparature of the service liquid is gragually increasing. It is neccessary to supply the pump with new fresh service liquid or in case of total recirculation to effectively cool the service liquid.

Liquid ring vacuum pumps can suck any kind of gas, providing that this is chemically compatible with pump's materials and that does not react with the service liquid. They are used in central vacuum units in hospitals, in pharmaceutical factories, in slaughter houses, in tobacco drying ovens, in textile industries and wherever vacuum creation is required.

TRM, in close-coupled version
Single stage, in close coupled version. Simple and robust construction. Smooth and noiseless running.

SPECIFICATIONS
• Max capacity 280 m3/h
• Final pressure 33 mbar
• Bore 1" to 2"
• Power 1 to 10HP
MATERIALS
• Pump body in cast iron
• Impeller in bronze or in stainless steel AISI304
• Shaft in AISI420
• Mechanical seal
• Also available in AISI316 version
MOTOR DATA
• TEFC motor
• 2 pole in 25,32 and 4 pole 40,50
• Voltage 3~ 400V/50HZ or 3~ 440V/60HZ

Brochure TRMB 25, 32

Brochure TRMB 40-50

TRMX, in close-coupled version
Pompetravaini new liquid ring pump series TRMX 250 and TRMX 320 are single stage, variable-port design, featuring greater performance than the previous TRMB pump series. Compact dimensions and volume 50% less compared with the traditional liquid ring vacuum pump designs.

SPECIFICATIONS
• Max capacity 95 m3/h
• Final pressure 33 mbar
• Bore 1" to 1 1/2"
• Power 1 to 5.5HP
MATERIALS
• Pump body in cast iron
• Impeller in bronze or in stainless steel AISI304
• Shaft in AISI420
• Mechanical seal
• Also available in AISI316 version
MOTOR DATA
• TEFC motor
• 2 pole in 25,32
• Voltage 3~ 400V/50HZ or 3~ 440V/60HZ

TRH, TRS  in bare shaft version

Double stage (TRH) or single stage (TRS). Wide range series.
Heavu duty construction for industrial and marine use.
SPECIFICATIONS
• Max capacity 3500 m3/h
• Final pressure 33 - 900 mbar
• Bore 1" to 8"
• Power 1 to 150HP
MATERIALS
• Pump body in cast iron
• Impeller in stainless steel AISI304
• Shaft in AISI420
• Mechanical seal
• Other materials on demand

MARCO PUMPS supplies also all TRH, TRS pumps as complete units with 3~ 400V/50HZ or 3~ 440V/60HZ electric motors

TRVX,  in bare shaft version

The new series of single stage, variported, design liquid ring vacuum pumps TRVX 1000 and TRVX 1250 introduce a new design in performance and reliability concepts.  The pump weight is average 30% less compared with the traditional liquid ring vacuum pump designs with compact supporting components dimensions. This advantage allows an installation and transportation costs saving.

SPECIFICATIONS
• Max capacity 2000 m3/h
• Final pressure 33 mbar
• Bore 4" to 5"
• Power 20 to 100HP

Calculation of required capacity 

A formula for the required pump capacity is :

      2,3 V x 60            P1
S = ------------  log10 ----, where :
              T                 P2

S= Required capacity, in m3/h
V= Volume to be evacuated, in m3
Τ= Time required to reach the final vacuum, in minutes
P1= Initial pressure in Torr
P2= Required final pressure in Torr