The structure and working principle of stainless steel pneumatic flange butterfly valve

Stainless steel pneumatic flange butterfly valve, with pneumatic actuators in application, because pneumatic actuators perform very fast and do not need to be done by workers themselves, it can save manpower and time cost.

Working principle of stainless steel pneumatic flange butterfly valve

The advantages of stainless steel pneumatic butterfly valve flange mainly has simple structure, small volume and light weight, cheap price, usually installed in the upper passage, after two position five way solenoid valve control easy to operate, but also can adjust the flow of medium. The fluid resistance is low, medium and large caliber pneumatic butterfly valve fully open when the larger effective flow, quick opening and closing and pulling rotation angle of 90 degrees to the butterfly can be opened and closed, because the shaft on both sides of the disc hand medium is approximately equal to the force, torque and the opposite direction, so the opening and closing torque is small, but also under low pressure good sealing butterfly valve sealing material is mainly butadiene acrylonitrile rubber, fluorine rubber, edible rubber, PTFE, so the sealing performance should be relatively good, which is soft and hard sealing butterfly valve has the advantages of laminated sheet metal, metal seal and elastic sealing, even under low temperature sealing performance is also very good.

Application of stainless steel pneumatic butterfly valve is used to rotate with the valve orange do open and close, thus enable the action of the pneumatic valve main shut-off valve used to do, can be designed to have a section of the valve or adjust the function and regulation, is now very much application of butterfly valve in the low pressure large size pipelines.

The structure of the pneumatic flange butterfly valve of stainless steel

The butterfly plate of the butterfly valve is installed in the direction of the diameter of the pipe. In the cylindrical channel of pneumatic flange valve body, the disc shaped butterfly plate revolves around the axis, the rotation angle is between 0 degrees -90 degrees, when the rotation is 90 degrees, the valve is in the full open state.

The butterfly valve is usually made up of only a few small parts. And as long as the rotation of 90 degrees can be completed fast opening and closing, easy operation, and the electric valve of the fluid control performance is very good. When the pneumatic flange butterfly valve is fully open, the thickness of the butterfly plate is the only resistance of the medium flowing through the valve body, so the pressure generated by the valve will be very low, so it has relatively good flow control characteristics.

The seal form of pneumatic flange butterfly valve has two kinds of elastic seal and metal seal. Elastic sealing valve, sealing ring can be inlaid on the valve body or attached to the circumference of the butterfly plate.

The life of a valve using a metal seal is generally better than a flexible sealing valve, but it is also difficult to complete a complete seal. Metal seals can adapt to higher working temperatures, and elastic seals have a temperature limitation.

If the stainless steel pneumatic flange butterfly valve is used as the flow control, it is generally to choose the size and type of the valve. The structural principle of the butterfly valve is especially suitable for making large caliber valves. The butterfly valve is not only widely used in oil, gas, chemical, water treatment and other common industries, but also used in the cooling water system of the thermal power station.

Source: China Butterfly Valve Manufacturer – Yaang Pipe Industry Co., Limited (

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