General failures and treatments of centrifugal pump

1. General failures and treatments
of centrifugal pump (I)

2. • Pump can’t be started or boot load is large
• Causes and treatment methods are as follows:
• The prime mover or power is not normal. Approach is to check the power supply and the prime mover circumstances.
• Pump stuck. Approach is dynamic coupling plate by hand to check if necessary, checking the disintegration eliminate static and dynamic part of the fault.
• Packing too tight. Treatment is relaxing filler.
• The discharge valve is not closed. Approach is closed discharge valve, restart.
• The balance pipe is not smooth. Approach is to clear the balance pipe.
• The pump does not drain
• Causes and treatment methods are as follows:
• Lack of irrigation pump (or pump gas is not drained). Approach is to re-prime the pump.
• Pump turn is not right. Approach is to check the direction of rotation.
• The sanitary pump speed is too low. Approach is to check the speed, increase speed.
• Filter is clogged, the bottom valve is not working. Approach is to check the filter, to eliminate debris.
• On the suction height is too high, or a vacuum suction tank. Approach is to reduce the suction height; check the suction tank pressure.
• 3. Interruption after draining
• Causes and treatment methods are as follows:
• The suction line leak. Approach is to check the side pipe joints and sealing situation of stuffing box.
• The suction side of the gas is not drained when the pump is irrigating. Approach is asked to re-prime the pump.
• The suction side suddenly is blocked by foreign body. Treatment is to stop the pump and handle foreign body.
• Inhalation of large amounts of gas. Approach is to check whether there is a vortex inlet, submerged depth is too shallow.
• Honghai Pump Co., Ltd.