NEWS CENTER


Pneumatic butterfly valve installation analysis


Release time:

2021-06-17

pneumatic butterfly valveIt is composed of pneumatic actuator and butterfly valve. The pneumatic butterfly valve is made of a circular butterfly plate rolling with the valve orange to open and close, so as to realize the pneumatic valve that enables the action. It is mainly used as a block valve. It can also be designed to have the function of conditioning or section valve and conditioning. At present, the butterfly valve is used more and more in low-pressure and large-diameter pipelines.

Pneumatic butterfly valve installation analysis

pneumatic butterfly valveIt is composed of pneumatic actuator and butterfly valve. The pneumatic butterfly valve is made of a circular butterfly plate rolling with the valve orange to open and close, so as to realize the pneumatic valve that enables the action. It is mainly used as a block valve. It can also be designed to have the function of conditioning or section valve and conditioning. At present, the butterfly valve is used more and more in low-pressure and large-diameter pipelines.
The butterfly plate of the butterfly valve is installed in the diameter direction of the pipeline. In the cylindrical passage of the butterfly valve body, the disc-shaped butterfly plate rotates around the axis, and the rotation angle is between 0 °-90 °. When rotating to 90 °, the valve is in a fully open condition. Butterfly valve structure is simple, small size, light weight, only by a small number of parts.
And only need to rotate 90 ° can be quickly opened and closed, the operation is simple, together with the valve has good fluid control characteristics. When the pneumatic butterfly valve is completely open, the thickness of the butterfly plate is the only resistance when the medium flows through the valve body, so the pressure drop generated by the valve is very small, so it has good flow control characteristics.
Butterfly valve has elastic seal and metal seal two types of sealing. Elastic sealing valve, the sealing ring can be embedded in the valve body or attached to the periphery of the butterfly plate.
Metal-sealed valves generally have a longer life than elastic-sealed valves, but it is difficult to seal completely. Metal seals can adapt to higher operating temperatures, while elastic seals have the disadvantage of being temperature-limited.
If the butterfly valve is required to be used as a flow control, the first thing is to correctly select the size and type of valve. The structure principle of butterfly valve is especially suitable for making large diameter valve. Butterfly valve is not only widely used in oil, gas, chemical industry, water treatment and other general industries, but also used in the cooling water system of thermal power stations.
Commonly used butterfly valve with wafer type butterfly valve and flange type butterfly valve two. The wafer type butterfly valve is to connect the valve between the two pipe flanges with stud bolts. Flanged butterfly valve is to have a flange on the valve, and the flange on both ends of the valve is connected to the pipe flange by bolts.