Pneumatic butterfly valve Introduction

Pneumatic valve pneumatic butterfly valve is composed of pneumatic actuators and butterfly valves. Pneumatic butterfly valve is used with the rotation of the circular disc Kom do hoist, so as to enable the operation of pneumatic valves to achieve the main shut-off valve used to do, or can be designed to have a regulating valve and regulate the function of segment, in low voltage high current butterfly The use of medium-caliber pipes more and more.
Pneumatic valve
Butterfly butterfly plate mounted on the pipe diameter direction. In the valve body, the cylindrical passage, the disc-shaped disc around the axis of rotation, angle of rotation between 0 ° -90 °, rotation to 90 ° when the valve is in the fully open state. Butterfly simple structure, small size, light weight, by only a few parts. And just rotate 90 ° to quickly open and close, easy to operate, while the fluid control valve has good features. Valve in the fully open position, the disc thickness is the only medium flows through the resistance of the valve body, through the valve so that the pressure drop generated is small, it has a better flow control characteristics. There are bombs and metal sealing butterfly valve sealing two kinds of cable marker ties type. Elastic sealing valves, seals can be mounted on the body or attached to the disc periphery. Metal sealed valve generally higher than the elastic sealing valves, long life, but it is difficult to completely seal. Metal seal can accommodate the higher operating temperature, the elastic truck seal is a temperature limit of defects. If the requested use as a flow control valve, main valve of choice is the right size and type. Butterfly structure principle is particularly suitable for the production of large diameter valves. Butterfly not only in oil, gas, chemical, water treatment and other general industries are widely used, but also used in thermal power plant cooling water system. Common butterfly valve wafer type butterfly valve and flange type butterfly two kinds. Wafer type butterfly valve is connected to the valve stud in two pipe flanges, flange type butterfly valve is a valve with a flange bolt flanged ends of the valve in the pipe flange.