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Swing Check Valves Features

Blog,Valves Study | Nov.02.2020

The swing check valves adopt a built-in rocker swing structure. All the opening and closing parts of the valve are installed inside the valve body and do not penetrate the valve body. Except for the sealing gasket and sealing ring at the middle flange, the whole structure is no leakage point, preventing the possibility of valve leakage. It is suitable for clean medium, not suitable for medium containing solid particles and high viscosity. As for the structural characteristics of the swing check valve, let’s introduce it to you!

The swing arm of the swing check valve adopts a spherical connection structure at the connection between the rocker arm and the valve flap, so that the valve flap has a certain degree of freedom within the range of 360 degrees, and there is an appropriate micro position compensation. Swing check valves have been widely used in many fields such as chemical industry, metallurgy, and pharmaceuticals.

Swing check valve is a valve that can automatically prevent fluid backflow. The disc of the check valve is opened under the action of fluid pressure, and the fluid flows from the inlet side to the outlet side. When the pressure on the inlet side is lower than that on the outlet side, the valve flap is automatically closed under the action of the fluid pressure difference, gravity and other factors to prevent the fluid from flowing back.

The flap of the swing check valve rotates around the axis of rotation, and its fluid resistance is generally lower than that of the lift check valve. The swing check valve is suitable for occasions with larger diameters. The installation position is not restricted. It is usually installed in a horizontal pipe. Road, it is suitable for occasions with larger diameters. According to the number of flaps, it can be divided into three types: single flap swing, double flap swing and multi flap swing. Single flap swing check valve is generally used in occasions with medium caliber. When single flap swing check valve is used for large-caliber pipelines, in order to reduce water hammer pressure, it is best to use a slow closing check valve that can reduce water hammer pressure. The double flap swing check valve is suitable for large and medium diameter pipelines. Wafer double flap swing check valve with small structure and light weight, it is a faster check valve; multi flap swing check valve is suitable for large diameter pipeline.

Swing check valve is suitable for various pipes with nominal pressure PN1.0MPa——42.0MPa, Class150-2500; nominal diameter DN15——1200mm, NPS1/2——48; working temperature——196——540℃ On the road, it is used to prevent the medium from flowing back. By selecting different materials, it can be applied to various media such as water, steam, oil, nitric acid, acetic acid, strong oxidizing media and urea.

The swing check valve adopts a built-in rocker swing structure. All the opening and closing parts of the valve are installed inside the valve body and do not penetrate the valve body. Except for the sealing gasket and sealing ring at the middle flange, the whole There is no leakage point, preventing the possibility of valve leakage. The swing arm of the swing check valve adopts a spherical connection structure at the connection between the rocker arm and the valve flap, so that the valve flap has a certain degree of freedom within the range of 360 degrees, and there is an appropriate trace position compensation. Swing check valve is suitable for clean medium, not suitable for medium containing solid particles and high viscosity.


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