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In the operation of stainless steel horizontal multistage centrifugal pump will encounter a series of problems, such as lack of flow, lift is not enough, the pump can not get water, parts damage, motor burnout and other failures. When dealing with these problems, how to deal with it? The following methods for your reference. Stainless steel horizontal multistage centrifugal pump repair methods Want to solve these problems, you must first know how to use stainless steel horizontal multistage centrifugal pump and how to carry out maintenance. First of all: 1, test the motor's steering, looking from the motor to the pump, the pump rotates counterclockwise. Remember, the test time is short to avoid mechanical seal dry wear. 2, open the exhaust valve to allow liquid to flow until the liquid is full of water pump and then close the exhaust valve. 3, check the various parts of horizontal multistage centrifugal pump is abnormal. 4, with a lubricating liquid lubrication mechanical seal face. 5, high temperature horizontal multistage centrifugal pump should be preheated, heating rate of 50 ℃ per hour. Second: 1, open the suction inlet valve, close the outlet valve. 2, start the motor, observe the pump is running correctly. 3, adjust the outlet valve opening according to the required conditions, to ensure that the motor runs within the rated current, otherwise it will cause the pump overload operation to make the motor burn out. 4, check the seal leakage, the normal mechanical seal leakage should be less than 3 drops / minute. 5, check the motor, bearing temperature should be less than 70 ℃. Finally: 1, high-temperature multi-stage pump to first cooling, cooling rate of less than 10 ℃ / minute, the temperature dropped to 80 ℃ below. 2, close the spit valve outlet. 3, stop the motor. 4, close the suction inlet valve. 5, if the pump is not used for a long time, the pump should drain the liquid clean. (Editor: cloud sea)