Some users find that the self-priming ability of oil pump gradually decreases after using it for a period of time. Why?
First of all, make sure you use a centrifugal oil pump or a gear oil pump or a screw oil pump. Here are some examples:
A: high temperature gear pump is not oiling reasons: general this gear pump is because the use of too long time inside the gear or other parts wear caused by the suction oil, the need to replace the internal parts or return to the factory for maintenance, and another is to determine how much temperature is? Is it caused by high temperature and so on.
Two: CYZ centrifugal pump is not oiling reason: this pump self-priming ability is very strong, if the new pump is not oiling should detect whether there is a problem in the pipeline, or whether the height is too high, more than the pump itself can withstand the limit; The use time is too long. The friction time between internal parts and materials is too long. It is necessary to replace a new pump.
Three: heat conduction oil pump self-priming ability is weak, suitable for heat conduction oil circulation, if not oilling, should change the pipeline or think of other methods. The filling of the air conduction oil pump in the inlet pipe and the pump body has been worn or compressed too loose due to long-term use, resulting in a lot of water from the gap between the packing and the pump shaft sleeve ejected, the result is that the external air enters the pump from these gaps, affecting the water lifting. The horizontal section of the inlet pipe in contact with the water pump shall apply a descent gradient of more than 0.5% in the reverse water flow direction, and the end connecting the water pump inlet shall be the highest, not completely horizontal. If upwarped, the inlet pipe will retain air, reducing the vacuum in the water pipe and pump, affecting oil absorption.
To sum up, pay attention to check the following points: whether the rotation direction is correct, whether the pump body parts of the oil pump are sealed well, whether the internal parts are worn seriously.
Why is the oil pump not oiled above? The introduction is written by botou Haina Oil Pump Co., LTD. (http://www.hinapump.com/) technical staff, shall not be reproduced without consent,
