Introductions of internal thread swing check valve

The double red check valve is a valve that automatically opens and closes the valve disc according to the flow of the medium itself and uses a rotating shaft to prevent the medium from flowing back. Also known as a one-way valve and return valve.

Here is the content list:

●Introductions of internal thread swing check valve

●Working principle of internal thread swing check valve

Introductions of swing check valves

The check valve is an automatic valve. Its main function is to prevent the media from flowing backward, prevent the pump and drive motor from turning backward and discharge the media in the container. The check valve can also be used to supply air to the auxiliary system whose pressure is higher than the system pressure. The check valve can be divided into a swing check valve (rotating according to the center of gravity) and a lift check valve (moving along the axis). These valves usually need to be installed horizontally in the pipeline.

Working principle of internal thread swing check valve

Working principle of internal thread swing check valve

The function of this valve is to allow the medium to flow in only one direction and prevent the flow direction. Typically, these valves operate automatically. The valve disc is opened due to hydraulic pressure flowing in one direction. When the fluid flows in the opposite direction, the fluid pressure and the self-matching of the valve disc act on the valve seat, thus preventing the flow.

Among them, the internal thread check valve and butterfly check valve belong to this type of valve, including the swing check valve and lift check valve. The swing check valve has a hinge mechanism and a gate valve disc, which can be freely placed on the inclined seat surface. The valve seam is designed with a hinge mechanism to make the valve seam reach the proper position on the valve seat surface every time, and the valve seam has enough rotation space to truly cover the valve seam. Contact the valve seat. The valve crack can be made of metal or can be covered with leather, rubber, or synthetic material, depending on the performance requirements.

When the swing check valve is fully opened, the hydraulic pressure is almost not blocked, and the pressure drops through the valve relatively small. The lift check disc is located on the sealing surface of the valve body seat. The rest of the valve is like a stop valve, but you can move the valve disc up and down freely. The pressure of the fluid lifts the disc from the sealing surface of the paper. When the medium returns, the disc returns to the paper, thus preventing the flow. According to the service conditions, the valve disc can be an all-metal structure, or it can be in the form of a rubber pad or rubber ring installed in the valve disc bracket. Like the globe valve, the fluid flow through the lift check valve is very narrow, so the pressure drop through the lift check valve is greater than the pressure drop of the swing check valve, limiting the flow of the swing check valve.

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If you want to know more information about the internal thread swing check valve, welcome to consult us. Our website is:www.luomaivalve.com.