Pneumatic butterfly valve from DBV
DBV pneumatic metal to metal seat butterfly valve uses the circular butterfly plate rotating with the valve as the opening and closing property to realize the opening and closing action. The pneumatic valve is mainly used as a block valve. It can also be designed to have the function of regulation or section valve and regulation. The butterfly valve is more and more used in low-pressure large and medium-sized pipelines.
The main advantages of pneumatic hard seal butterfly valve are simple structure, small volume, light weight and low cost. The characteristics of pneumatic butterfly valve are particularly remarkable. It is installed in a high-altitude concealed channel, controlled by two position five way solenoid valve, easy to operate and can also adjust the flow medium. The fluid resistance is small. When the pneumatic butterfly valve with medium and large diameter is fully opened, the effective flow area is large, and the opening and closing is fast and labor-saving. The opening and closing can be completed by rotating the disc plate at an angle of 90 degrees. Because the medium force of the disc plate on both sides of the rotating shaft is close to the same, and the torque direction is opposite, the opening and closing torque is small, and good sealing can be achieved under low pressure. The sealing materials of the butterfly valve include nitrile rubber and fluororubber, Edible rubber is lined with PTFE, so it has good sealing performance. The hard sealing butterfly valve is soft and hard laminated metal plate, which has the advantages of metal hard sealing and elastic sealing. It has excellent sealing performance no matter at low temperature.
If the butterfly valve is required to be used as flow control, the main thing is to correctly select the size and type of the valve. The structural principle of butterfly valve is especially suitable for making large-diameter valves. Butterfly valve is not only widely used in petroleum, gas, chemical industry, water treatment and other general industries, but also used in the cooling water system of thermal power station.