GHL filter products
Many oil filters are equipped with bypass valves and check valves, but few people know their role. Let us briefly introduce the functions and functions of its components.
1 Bypass Valve
When the filter element in the filter is blocked due to excessive impurities, the bypass valve will open, and the lubricating oil will directly enter the engine for lubrication without passing through the filter element. The bypass valve is designed for emergency lubrication, so as not to cause more serious dry wear of the engine due to lack of lubricating oil.
The common bypass valve has two structures, one is spot welded or riveted on the lower end cover, and the other is placed on the top. The specific structure and components are shown in the figure below:
Animation of the working principle of the bypass valve
2 Check Valve
When the installation position of the filter is facing downwards or in a horizontal position, if the engine stops working, the oil will flow back to the oil pan, resulting in no oil in the oil filter. But when the engine is started next time, in order to ensure the safety of the engine, the oil must be refilled in the entire lubricating system, which prolongs the time for the lubricating oil to reach the lubrication of the engine body and increases the wear of the engine body. The function of the check valve is to prevent the oil in the filter from draining, and to ensure that the filter is full of oil at any time. When the engine is restarted, the oil can reach the engine body for lubrication almost instantly.
Post time: Sep-18-2021