The common faults of water ring vacuum pump are low vacuum degree or stuck.

1. Stuck during test run or operation

Cause: serious scaling solution: dismantle and remove or use acid pickling

Cause: the packing gland is too tight. Solution: loosen the gland bolt

Cause: internal parts rust solution: pull the rotor and clean with oxalic acid

Cause: foreign matters jam pump rotor solution: wash with water and open for inspection

2. Motor short circuit or overload

Cause: winding short circuit solution: check the motor winding.

Cause: the working fluid flow is too high. Solution: adjust the water inlet valve to reduce the working fluid flow

Cause: the exhaust pressure is too high. Solution: reduce the exhaust pressure to the specified range

Cause: the liquid content in the inhaled gas is too high. Solution: install separator at the inlet or reduce the flow rate of working fluid

3. Low vacuum

Cause: the belt slip causes the speed to drop. Solution: tighten the belt

Cause: the water supply is insufficient or the temperature is too high. Solution: adjust the water supply and reduce the temperature of the working fluid

Cause: vacuum system leakage solution: check the stuffing box pipeline and the gap in the pump for leakage

Cause: the vacuum gauge shows incorrect solution: replace the vacuum gauge

Cause: valve plate falls off solution: replace valve plate

4. High vibration and noise

Cause: shaft alignment is not good solution: re alignment and locking

Cause: the foundation bolt is loose. Solution: tighten the anchor bolt

Cause: the flow rate of working fluid is too high. Solution: install orifice flowmeter to reduce the flow

Cause: the suction and exhaust pipe wall is too thin. Solution: use a thick tube

5. The bearing is heated

Cause: lack or excess of lubricating grease solution: improve lubrication conditions

Cause: improper bearing installation solution: adjust the bearing

Cause: the bearing is rusted and the raceway is scratched. Solution: replace the bearing with a new one