Working Principle Of Air Actuated Butterfly Valves

Air Actuated Butterfly Valve is composed of pneumatic actuator and butterfly valve. The basic working principle of pneumatic 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 valve, mainly for the use of cut-off 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 actuator butterfly valve includes simple structure, small size, lightweight, 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.

Working Principle of Air Actuated Butterfly Valves

Air actuated butterfly valves use compressed air to control the opening and closing of a butterfly valve. The basic working principle of air actuated butterfly valves involves the following steps:

Compressed Air Supply: Compressed air is supplied to the air actuator of the valve, which then converts the air pressure into mechanical force.

Actuator Movement: The actuator moves in response to the air pressure, which causes the valve stem to move and the valve disc to rotate.

Valve Opening: As the valve disc rotates, the flow of fluid or gas through the valve increases. The valve is fully open when the disc is in a 90-degree position.

Valve Closing: When the air pressure is released from the actuator, the valve disc rotates back to its original position, closing the valve and stopping the flow of fluid or gas.

Pneumatic Butterfly Valve is divided into Spring Return(Single Acting) Pneumatic Butterfly Valve and Double Acting Pneumatic Butterfly Valve.

Spring Return(single acting) pneumatic actuator 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 valves need to be equipped with 5-way 2-position solenoid valve to control the air goes into different entrances 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.

The following animation video allows us to better understand the working principle of the pneumatic actuator butterfly valve.

Features Of Air Actuated Butterfly Valves:

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

Technical Parameters Of Air Actuated Butterfly Valves:

● Connection Type: Wafer, Lug, Tri Clamp, Double Flange

● Material: Cast Iron, Stainless Steel and Plastic

● Actuator Type: Spring Return / Double Acting

● Operating Pressure: 10 / 16 bar

● Medium Temperature: -10 to 180 ℃

● Size Range: 2" to 24"

● Air Pressure Supply: 6-8 bar

 

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