What Is Pneumatic Butterfly Valve

Pneumatic butterfly valve is a kind of valve with a pneumatic actuator added to the body of the butterfly valve, and it is compressed air that drives the pneumatic butterfly valve to switch. So where is the pneumatic butterfly valve usually used? What is its role?

In general, the pneumatic butterfly valve is installed in the small diameter pipeline, used to control the flow of water, steam, air, slurry, oil and various corrosive media and other fluids. Pneumatic butterfly valves are small in size and light in weight, and are easy to install and maintain. As we mentioned above, pneumatic butterfly valve is driven by compressed air, which has high requirements for air quality, so the driving device of pneumatic butterfly valve also contains various accessories, such as air filtering and reducing valve, pneumatic solenoid valve, positioner, etc., the former's role is to filter the air impurities and water, and the latter's role is to control the actuator's opening and closing.

Working Principle Of Pneumatic Butterfly Valve

Pneumatic butterfly valve through the positioner, solenoid valve or other equipment, absorbed into the dry, lubricated air, and control them, these gases are transmitted to the cylinder of the pneumatic actuator, and the air is compressed to become the air source of the pneumatic actuator work, when the compressed air in the cylinder into the pneumatic actuator air chamber, the pneumatic pressure is applied to the piston, resulting in the thrust driven output shaft rotation, while driving the valve stem and butterfly plate At the same time, it drives the valve stem and butterfly plate to rotate, and then it completes an opening and closing action of the butterfly valve.

Pneumatic Butterfly Valve Working Principle

Pneumatic butterfly valve using compressed air to promote the actuator within the multi-group combination of pneumatic piston movement, the transmission of force to the beam and the characteristics of the inner curve of the track, driven by the hollow core spindle for rotary movement, compressed air air air disc to the cylinders, change the inlet and outlet position to change the direction of rotation of the spindle, according to the butterfly valve rotating torque requirements, you can adjust the number of combinations of cylinders, drive the butterfly valve work.

Add a valve positioner to the pneumatic butterfly valve to adjust the opening precisely. Intelligent positioner can also be used to connect with the field bus to detect the working status of the pneumatic butterfly valve.Pneumatic butterfly valve through the work of pneumatic actuator, can be flexible and fast to achieve the opening and closing of the switch, can effectively protect the pipeline safety, is a kind of control valve in the industrial pipeline to use more.