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liquid ring vacuum pumps

applications

advantages: disadvantages: suction capacity: How it works:

liquid ring vacuum pump - principle

two-stage liquid ring vacuum pump
two-stage liquid ring vacuum pump, flat sided (axial distribution) (Travaini)

single stage liquid ring vacuum pump
single stage liquid ring vacuum pump, radial distribution (Alstom, Bell,...)

NASH 904
NASH 904 Vacuum Pump.
The NASH 904 replaced the popular NASH CL pump in the 1980's.
This 904 pump can be found in major industries, including Paper, Chemical, and Mining.

double lobe liquid ring vacuum pump
double lobe:
2 complete cycles (inlet, compression, discharge) for each revolution.

 

FAQ's - liquid ring vacuum pumps


liquid ring vacuum pumps manufacturers

Books about liquid ring technology

Liquid ring patents

 

More vacuum? Using water at 15°C as sealant (Partial Vapour Pressure = 17 mbar), the end vacuum will be around 25 mbar.
With water at 35°C (PVP = 57 mbar), the end vacuum will be around 70 mbar.
With ethylenglykol at 80°C (PVP=1 mbar), the end vacuum will be around 10 mbar.

 

Higher compression ratio?