Pneumatic butterfly valve selection guide
- - - - - - - - - - - - : pneumatic butterfly valve by pneumatic piston quarter-turn actuators and composition, is one of the control valve used in more extensive, especially in low pressure, large diameter under the condition of high cost performance, quickly switch, switch can be used to adjust and control. A single eccentric butterfly valve have been made by the midline structure development, double eccentric, three eccentric structure, can be selected according to different working conditions. Customers buy pneumatic butterfly valve requirements, according to the use place, purpose, and understand the relevant laws and regulations, specifications, standards, guidelines and allowable approval can choose suitable for various requirements of the valve; , confirm the valve working conditions, suitable medium, working pressure, medium temperature; Or to determine the match the pipe nominal diameter DN ( mm) 、NPS( ” ) ; , determine the way connected to pipe flange, ( ) Screw type, welding type, the wafer, the clamp, the card sets of type; , make sure the valve drive mode of the operation manual, worm gear and worm drive, pneumatic, electric, hydraulic, electromagnetic actuator, electric hydraulic, etc. ; , confirm the type of valve gate valve, globe valve, throttle valve, plunger valve, ball valve, butterfly valve, diaphragm valve, plug valve, check valve, electric actuator, drain valve, pressure reducing valve and other special valves; , determine the use form of the switch valve type, external regulation, safe, etc; Or to determine the valve body and internal parts material of carbon steel, alloy steel, stainless steel, ductile iron, grey cast iron, copper alloy, aluminum alloy, plastic, etc. ; , to determine the valve sealing performance requirements, rank or seal leakage; , to determine the valve protective coating requirements, packaging requirements, transportation requirements; , special needs, also should determine the structure length, height of valve, valve installation dimensions, flow resistance, discharge capacity, flow characteristics, protection grade, explosion-proof performance parameters such as; , determine the installation position of the valve and position. Pneumatic butterfly valve usually linked by electric actuators and pneumatic butterfly valve, after installation and debugging as electric valve. Use electricity as the power of electric valve to turn on the electric actuator pneumatic butterfly valve, pneumatic butterfly valve switch, adjust the action. So as to achieve medium switch or adjust the purpose of the pipes.