Vacuum Pumps

$ 1,456.00

Liquid-ring systems can be single- or multistage.  Typically a multistage pump will have up to two compression stages on a common shaft.   In vacuum service, the attainable pressure reduction is limited by the vapor pressure of the ring-liquid.  As the generated vacuum approaches the vapor pressure of the ring-liquid, the increasing volume of vapor released from the ring-liquid diminishes the remaining vacuum capacity.  The efficiency of the system declines as a result.


Liquid-Ring Vacuum Pumps is a rotating positive-displacement pump.

They are typically used as a vacuum pump, but can also be used as a gas compressor.  The function of a liquid-ring pump is similar to a rotary vane pump.  The big difference being that the vanes are an integral part of the rotor and churn a rotating ring of liquid.  This liquid formation engages the compression-chamber seal.

They are an inherently low-friction design, with the rotor being the only moving part.  Sliding friction is limited to the shaft seals.  Liquid-ring pumps are typically powered by an induction motor.


How does the Vacuum Pumps work?


The liquid-ring Vacuum pumps compress gas by rotating a vaned impeller located eccentrically within a cylindrical casing.  Liquid (usually water) is fed into the pump and, by centrifugal acceleration, forms a moving cylindrical ring against the inside of the casing.

This liquid ring creates a series of seals in the space between the impeller vanes, which form compression chambers.  The eccentricity between the impeller’s axis of rotation and the casing geometric axis results in a cyclic variation of the volume enclosed by the vanes and the ring.

In addition the Gas, often air, is drawn into the pump through an inlet port in the end of the casing.  The gas is trapped in the compression chambers formed by the impeller vanes and the liquid ring.

Also, the reduction in volume caused by the impeller rotation compresses the gas.  This then reports to the discharge port in the end of the casing.

Furthermore, compressed gas on discharge of pump contains certain amount of working liquid which is usually removed in vapor–liquid separator.

In conclusion, if this Vacuum Pumps does not meet your application we can provide a different type of vacuum related pump.  If it is not a vacuum pump you are looking for, pls select the following below

Visit our other selections

Centrifugal Pumps

Gear Pumps

Lobe Pumps

Additional information

Weight 45 lbs
Dimensions 30 × 14 × 14 in
Materials of Construction

Cast, Stainless

Connection End

NPT Threaded, Flanged, Triclamp


General Duty, Hazardous


Single Stage, Dual Stage








There are no reviews yet.

Only logged in customers who have purchased this product may leave a review.

You may also like