Manifold block

How does Manifold block hydraulic system enter air?


Hydraulic system exhaust usually refers to the new installation or maintenance after the first action, to remove the air in the pipeline. Air entering the hydraulic system will form bubbles in the oil, which will lead to unstable system pressure and vibration of the pipeline and equipment.


It is usually to open the exhaust device of the actuator (pressure measuring joint or press head), so that the actuator moves slowly, and observe whether there is air discharge until there is no air, install the exhaust plug, and repeat 1 to 3 times. Some hydraulic actuators have no exhaust device, so just make the hydraulic cylinder full line action 3 to 5 times. It is also possible to open the exhaust by pressing the head at the highest point of the line in the same way as the exhaust on the hydraulic device.


By increasing the oil return filtration, the bubbles in the oil can be appropriately reduced.


Increasing the volume of the tank can facilitate the rise of bubbles in the oil and eliminate the presence of air.


The return pipe goes directly into the oil tank below the page to reduce the generation of bubbles.


In addition, the suction pipe line of the pump should be checked for leakage. If so, there will be air entering the pipeline when the pipeline is empty. Recommended reading: “Hydraulic system noise, vibration, how to do”

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