Structure and installation of check valve for hydraulic pump

Check valve is one of the components of the hydraulic pump, about its working principle and structure, Xiaobian and everyone to do a brief introduction.

About structure

The valve check valve cylindrical disk-shaped, around the seat channel through a rotating shaft for rotation, because the valve channel into a streamlined, compared rose butterfly valve, the utility model has the advantages of small flow resistance, suitable for large caliber occasions with low velocity and flow changes, but not for the pulsating flow, the sealing performance is less than lift. Single, double flap and most butterfly butterfly valve is the main classification, mainly according to the valve diameter to divide, the purpose is to prevent the medium stopped flow or backflow, weakening hydraulic impact.

Working principle

The ball can be used on the high pressure small caliber check valve. The valve shape of the Muffler check valve is the same as that of the globe valve, so it has a large coefficient of fluid resistance.

The structure is similar to the globe valve, and the valve body and valve clack are the same as the globe valve. When the medium is downstream, the valve is opened by the medium thrust; when the medium stops, the valve falls down on the valve seat and prevents the medium from flowing upstream.

Through the butterfly valve, the direction of the entrance and exit of the medium is perpendicular to the direction of the valve seat; the vertical lift check valve has the same direction of the inlet and outlet of the medium and the direction of the valve seat, and its flow resistance is smaller than that of the straight through check valve.

Check valve that rotates around the pin pin in the valve seat. The disc type check valve is simple in structure and can only be installed on the horizontal pipeline, and the sealing is better. A valve sliding along the centerline of a valve body. Pipe type check valve is a new kind of valve, which is small size, light weight, good processing technology, is one of the development direction of check valve. But the fluid resistance coefficient is slightly larger than that of the swing check valve.

Compression type check valve: This valve is used as boiler water supply and steam cut-off valve, it has the lift check valve and globe valve or angle valve comprehensive function.

In addition, there are - some do not apply to pump outlet check valve is installed, such as valve, spring type, Y type check valve.