The types of filter sealing rings are mainly classified by material and structural type. The materials include multiple types of high-molecular materials such as nitrile rubber, fluorine rubber, and silicone rubber. The structural types cover O-rings, V-rings, lip seals, and others.

1. Coarse filtration: Coarse filters  have a wide range of filtration precision typically, generally between 50 μm and 500 μm. They are mainly used to filter larger particles or impurities, such as leaves, sand and gravel, etc., to protect the equipment and pipelines in the system.

Filter oil leakage may be caused by various reasons.

Manual backwashing filters are effective water treatment devices that can remove impurities and particles from water and keep it clean. The following are the operation steps of the manual backwashing filter:

Hydraulic filter by-pass valve is a valve used for filter by-pass in hydraulic system. Common filter by-pass ways include check valve, throttle valve and bidirectional by-pass valve.