Water-Ring Vacuum Pump Loses Vacuum

What is the water in -out temperature.

Does it going donward after runing how long time.

This pump need water to be cool.

We are using cooling coil to cool inlet water and recycle the water after cooling to reduce water wastage. In our system vaccume pump outlet water goes in a tank where we cool this water with cooling coil and again use it in vaccume pump for water ring. We are also using a circulation pump for water, installed in between water tank and vaccume pump.

Did you check the pressure and line specifications for feeding cool water in the pump. Too less or too much of water is a basic problem for all water ring vacuum pumps. Do you notice any leakage of water from the pumps shafts? Heavy leakage of water from the pump could also be a problem. Mahess

This is not the same pump. It is another one but both the pumps are of same capacity used in two different production lines.

The maximum vacuum able to be created by a water ring vacuum pump is that of the boiling pressure of the water at the temperature of the equipment. Refer to steam tables for a set of figures of the water/steam transition pressure at various temperatures.

A water ring vacuum pump will pull no vacuum at all at temperatures of 100degC and above, for example.