How does the air enter the hydraulic oil? What are the hazards? What are the ways to prevent it?

- Apr 28, 2018 -

Insufficient degassing of the hydraulic oil injected into the system by vacuum, or leakage of the inlet or suction pipe of the pump will allow the gas to enter the hydraulic oil.


Hydraulic oil with a large amount of gas will produce cavitation, vibration, noise, crawling, slow reaction and soft operation during system operation, and accelerate oil aging.


The ways to prevent are:

(1) The suction hoses of all pumps are installed below the tank surface;

(2) Ensure that the pump absorbs enough oil and the suction pipe does not leak;

(3) To facilitate venting in the system, a purge valve may be installed at the highest point of the system.


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