Pneumatic butterfly valve

Pneumatic butterfly valve introduction

Pneumatic butterfly valve is composed of butterfly valve and single acting or double acting pneumatic actuator with accessories:.positioner,handwheel, solenoid valve,limit switch,air regulator.
Specific categories of pneumatic butterfly valves are: stainless steel pneumatic butterfly valve,carbon steel pneumatic butterfly valve, PTFE FEP PFA lined pneumatic butterfly valve,Flanged end pneumatic butterfly valve,Wafer end pneumatic butterfly valve,Lug end pneumatic butterfly valve,concentric pneumatic butterfly valve,eccentric pneumatic butterfly valve and other butterfly valves.

Pneumatic butterfly valve can according to the sealing performance into metal seal and soft seal with compact structure、small volume、reliable operation、good sealing、easy maintenance installation convenient and the adoptability is strong advantages. Pneumatic butterfly valve can be widely used in petroleum、chemical industry、light industry、papermaking industrial、pharmaceutical、car automatic control system on a remote concentrated or local control.
 

Pneumatic butterfly valve technical parameter

● Connection Type: Wafer, Lug, Tri Clamp, Double Flange
● Material: Cast Iron, Ductile iron, Carbon steel. Stainless Steel and others
● Actuator Type: Spring Return / Double Acting
● Operating Pressure: 10-100 bar,150LB-900LB
● Medium Temperature: -10 to 180 ℃ for rubber seat, -40 to 450℃ for metal seat.
● Size Range: 2″ to 100″
● Air Pressure Supply: 6-8 bar
● Suitable Medium: Water, Oil, Air, Gas, etc

Pneumatic butterfly valve working principle

The basic working principle of pneumatic butterfly valve is that compressed air enters the pneumatic actuator to drive the piston, and then rotating or lifting torsion shaft drives the stem. Pneumatic Butterfly Valve is a circular disc rotating with the stem as an opening and closing function, in order to achieve the opening action of the pneumatic butterfly valve,which is mainly for the use of cut-off Valve, Pneumatic butterfly valve can also be designed to have the function of regulation or section valve and regulation At present, the use of butterfly valve in low pressure large and medium diameter pipeline is more and more.
The main advantages of pneumatic butterfly valve,is simple structure, small size, light weight, low cost, pneumatic butterfly valve this feature is particularly significant, installed in the high-altitude tunnel, through two-five-way solenoid valve control easy to operate, but also can adjust the flow medium.

Pneumatic butterfly valve is divided into Spring Return(Single Acting) Pneumatic Butterfly Valve and Double Acting Pneumatic Butterfly Valve.
Spring Return(single acting) pneumatic butterfly valve is the spring-driven Piston structure, there are two principles: normally open(NO) and normally closed(NC), which means that: when air goes in, the valve closed(NO); when air goes in, the valve opened(NC).
Double Acting pneumatic butterfly valve need to be equipped with 5-way 2-position solenoid valve to control the air goes into different entrance and then control the valve open and close. When driving the same valve body, the opening and closing speed of double acting is faster than the single acting.
 

Pneumatic butterfly valve feature

1.Small and light, easy to disassemble and repair, and can be installed in any location
2.The utility model has the advantages of simple and compact structure, small operating Torque, and quick 90-turn opening
3.Large size range for selection