The temperature and quality of the sealing liquid (in this case water) can have a dramatic effect on both the performance and reliability of a liquid ring vacuum pump.

Cool, clean water should be supplied to the pump if available. The standard performance curves are based on actual tests performed with a seal water temperature of 60°F. Temperatures above 60°F result in a capacity reduction. For details see "Effect of service water temperature on the capacity of liquid ring vacuum pumps".

Avoid dirty water containing abrasives such as sand or other abrasive solids, as it will cause erosion of the internal pump parts.

Extremely hard water may result in the formation of scale deposits on the internal pump parts, which will reduce the clearances and may cause the pump to lock up. These scale deposits can be removed by using a descaling fluid (DVT’s Scale-eX). Another preventative method is the installation of a water treatment system.

If the water supply is a real problem an alternative solution would be to use the DVT oil-sealed liquid ring Vmax system , which eliminates the use of water completely. For full details and information if this type of system is suitable for your application: contact the factory at 1-888-925-5444.