Main advantages and working principle of pneumatic butterfly valve
Main advantages of pneumatic butterfly valve
Pneumatic butterfly valve is characterized by simple structure, small volume, light weight, low cost, etc. It is installed in the high-altitude secret passage. Controlled by two position five way solenoid valve, it is easy to operate and the flow medium can also be adjusted. The fluid resistance is small, the effective circulation area is large when the medium and large caliber pneumatic butterfly valve is fully opened, the switch is fast and labor-saving, and the switch can be completed by rotating the disc wrench 90 degrees. As the acting force of the butterfly wrench medium on both sides of the shaft is nearly equal, the torque direction is opposite, the switching torque is small, and the sealing is good under low pressure. The sealing materials of butterfly valve include NBR, fluororubber, edible rubber and PTFE lining, so it has good sealing performance. Among them, the hard seal butterfly valve is a soft and hard laminated metal plate.
working principle
The pneumatic butterfly valve is opened and closed by using the round butterfly plate with valve orange rotation, which is mainly used as the stop valve to realize the starting action of the pneumatic valve. It can also be designed to have the function of regulating or sectioning the valve. Disk valves are increasingly used in low-pressure large and medium caliber pipelines.
The butterfly valve is simple in structure, small in volume and light in weight, and only consists of a few parts. Only 90 ° rotation is required for quick opening and closing, and the operation is simple. The electric valve has good fluid control characteristics. When the butterfly valve is fully opened, the thickness of the butterfly plate is the single resistance when the medium flows through the valve body, so the pressure generated through the valve decreases
Very small, so it has good flow control characteristics. The butterfly valve has elastic seal and metal seal. For elastic sealing valves, the sealing ring can be embedded on the valve body or attached to the periphery of the butterfly plate.
The butterfly valve is required to be used as the flow control, and the size and type of the valve are mainly selected. The structure principle of butterfly valve is especially suitable for making large diameter valves. Butterfly valves are not only widely used in oil, gas, chemical, water treatment and other industries, but also widely used in the cooling water system of thermal power plants.
