ZYB series unloading pumps common faults and troubleshooting

Fault Causes Remedy Others No oil or oil drained 1、Inhalation height exceeds rated value Increase suction liquid level 2、Intake pipe leak Check all connections, add asbestos plate and other sealing materials 3、The direction of rotation is not as shown in the pump The direction to be corrected 4, suction pipe plugging or valve closing Check the pipe is blocked, the valve is fully open 5, safety valve stuck or grinding damage to open the safety valve cleaning, and use fine grinding sand grinding valve hole taper, make it fit 6, Low liquid temperature and high viscosity Preheat liquid or reduce discharge pressure 7 Gear wear Replace gear seal Oil leakage 1 Shaft seal not adjusted Readjusted 2 Seal wear gap Large amount Tighten gland bolts or replace seals 3、Mechanical Sealed dynamic and static ring friction surface damage replacement replacement, static ring or re-grinding 4, spring relaxation replacement spring noise or vibration 1, suction pipe or filter plug to remove dirt on the filter, the suction pipe into the liquid surface is shallow Suction tube should reach about 0.5 meters into the liquid level 3, enter the air in the pipeline to inspect the joints to make them seal 4, the discharge resistance is too large Check the discharge pipe 5, gears, bearings or Severe wear of the side plate Removal of cleaning and trimming of defects or replacement 6. Interference of the rotating part Checking of the interference part and elimination of 7. Inhalation of liquid Viscosity is too great for viscosity measurement, can be compared with hot liquid or reduce discharge pressure 8, suction height exceeds rated value increase Inhalation level