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Lift Check Valve

Product introduction:

Lift check valve refers to a valve that automatically opens and closes the valve flap by relying on the flow of the medium itself to prevent the backflow of the medium, also known as check valve, one-way valve, reverse flow valve, and back pressure valve. The check valve is an automatic valve whose main function is to prevent the backflow of the medium, the reverse rotation of the pump and the driving motor, and the discharge of the medium in the container. Check valves may also be used on lines supplying auxiliary systems where pressure may rise above system pressure. Check valves can be mainly divided into swing check valves (rotating according to the center of gravity) and lift check valves (moving along the axis).

The disc of the lift check valve is seated on the sealing surface of the valve seat on the valve body. Except that the valve disc can rise and fall freely, the rest of the valve is like a globe valve. The fluid pressure lifts the valve disc from the sealing surface of the valve seat, and the backflow of the medium causes the valve disc to fall back to the valve seat and cut off the flow. According to the conditions of use, the disc can be of all-metal structure, or it can be in the form of a rubber pad or rubber ring embedded on the disc holder.



The function of the check valve is to only allow the medium to flow in one direction and prevent reverse flow. Usually this kind of valve works automatically. Under the action of fluid pressure flowing in one direction, the valve flap opens; when the fluid flows in the opposite direction, the fluid pressure and the self-coincident valve flap of the valve flap act on the valve seat, thereby cutting off the flow.

Product Description


The above data is for reference only, please contact us for more details.

Installation method

Lift check valve: A valve in which the disc slides along the centerline of the valve body. Pipeline check valve is a new valve. It is small in size, light in weight and good in processing technology. It is one of the development directions of check valve. However, the fluid resistance coefficient is slightly larger than that of the swing check valve.

Principle structure

1. When the medium flows in the specified direction, the valve disc is affected by the force of the medium, and when the medium is opened to flow back, the valve disc and the sealing surface of the valve seat are tightly closed due to the self-weight of the valve disc and the reverse force of the valve disc by the medium. It is closed to prevent the reverse flow of the medium.

2. The sealing surfaces of the valve body and disc are made of stainless steel surfacing.

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