D643 Pneumatic Hard Seal Flange Ball Valve Faden Valve Xi'an Office

D643 Pneumatic Hard Seal Flange Stainless Steel Butterfly ValveBy compressing air into the actuator, the actuator drives the butterfly plate to rotate 90 degrees, which is used as a pipeline switch and to regulate flow rate. The so-called switch mode control is only used for valve opening and closing. And the regulating control is to install a valve positioner on the pneumatic actuator, input corresponding signals, and adjust the butterfly valve disc from 0 to 90 degrees to achieve control of parameters such as medium flow rate, pressure, temperature, etc. Pneumatic flange butterfly valves have two sealing types: elastic sealing and metal sealing. Elastic sealed butterfly valve, the sealing ring can be embedded on the valve body or attached to the butterfly plate, with * sealing performance, but the disadvantage is that it is not suitable for high temperature places due to temperature limitations. Metal sealed butterfly valves can adapt to higher operating temperatures and generally have a longer lifespan than elastic sealed butterfly valves, but it is difficult to achieve * sealing.

D643 Pneumatic Hard Seal Flange Stainless Steel Butterfly ValveThe pneumatic valve, which uses a circular butterfly plate that rotates with the valve to achieve opening and closing, is mainly used as a block valve to achieve activation action. It can also be designed to have the function of regulating or regulating both section valves. Currently, the use of butterfly valves in low-pressure large and medium diameter pipelines is increasing.

1. The metal hard sealed butterfly valve adopts a three eccentric sealing structure, with almost no wear on the valve seat and butterfly plate, and has a sealing function that becomes tighter as it is closed;

2. The sealing ring is made of stainless steel, which has the dual advantages of metal hard sealing and elastic sealing. It has excellent sealing performance in both low and high temperatures, corrosion resistance, and long service life;

3. The sealing surface of the butterfly plate is made of welded cobalt based hard alloy, which is wear-resistant and has a long service life;

4. The large-sized butterfly plate adopts a truss structure, with high strength, large flow area, and low flow resistance;

5. This valve has bidirectional sealing function, which is not limited by the flow direction of the medium or the spatial position during installation, and can be installed in any direction;