(1) Symptom: Pump can not discharge Failure reasons: a, the opposite direction of rotation; b, suction or discharge valve is closed; c, no inlet or pressure is too low; d, viscosity is too high, the pump can not bite material Countermeasures: a, confirm the direction of rotation; b, confirm whether the valve is closed; c, check the valve and pressure gauge; d, check the liquid viscosity to low-speed operation by the speed ratio of the flow rate is there, (2) Symptom: Insufficient pump flow Failure reasons: a, suction or discharge valve is closed; b, the inlet pressure is low; c, the outlet pipe plugging; d, packing box leakage; e, low speed Countermeasures: a, confirm whether the valve is closed; b, check the valve is open; c, confirm the discharge volume is normal; d, tighten; a large number of leaks affect production, should stop running, disassembly inspection; ; (3) Symptom: abnormal sound Failure reasons: a, coupling eccentric or poor lubrication b, motor failure; c, reducer abnormalities; d, shaft seal at the installation of bad; e, shaft deformation or wear Countermeasures: a, find or fill grease; b, check the motor; c, check the bearings and gears; d, check the shaft seal; e, parking disintegration inspection (4) Symptom: the current is too large Failure reasons: a, the outlet pressure is too high; b, melt viscosity is too large; c, shaft seal assembly bad; d, shaft or bearing wear; e, motor failure Countermeasures: a, check the downstream equipment and pipelines; b, test viscosity; c, check the shaft seal, appropriate adjustments; d, check after parking, hand crank car is too heavy; (5) Symptom: Pump suddenly stopped Failure reasons: a, power failure; b, motor overload protection; c, coupling damage; d, the outlet pressure is too high, interlocking reaction; e, abnormal bite into the pump; f, shaft and bearing stuck stuck Countermeasures: a, check the power; b, check the motor; c, open the safety cover, disk inspection; d, check the instrument interlock system; e, after parking, reversing confirmation; f, Polyurethane System For Tyre Wheel Pu Wheel Chemicals,Wheel Polyurethane Casting Resin,Polyurethane Foam Type,Custom Wheel Pu Materials XUCHUAN CHEMICAL(SUZHOU) CO., LTD , https://www.xuchuanchem.com