The difference between electric butterfly valve and manual butterfly valve

Update:05 Jul 2019
Summary:

Electric butterfly valves can be classified as large-sc […]

Electric butterfly valves can be classified as large-scale electric valves, and can also be classified as electric control valves. The electric butterfly valve linking methods mainly include: flange type connection and clip type link; electric butterfly valve seal mainly includes: hard seal and soft seal. The electric butterfly valve controls the closing of the switch of the electric butterfly valve by an electric actuator. It can be used as a plugging valve, a regulating valve and a check valve for piping systems. With manual control assembly, if there is a problem with the actuator, the switch of the valve body can be controlled by the manual device without affecting the working condition.

Working principle of electric butterfly valve:

The pneumatic butterfly valve is composed of a pneumatic actuator and a butterfly valve. The pneumatic butterfly valve is opened and closed by a circular disc rotating with the valve stem. The pneumatic valve that has been completed is mainly used as a cut-off valve, which can be used as a switch and regulation application. The application of the butterfly valve in the high-pressure large-diameter pipe more and more. Pneumatic butterfly valve classification: stainless steel pneumatic butterfly valve, hard seal pneumatic butterfly valve soft seal pneumatic butterfly valve, carbon steel pneumatic butterfly valve.

Working principle of pneumatic butterfly valve:

It consists of a pneumatic actuator and a butterfly valve. The pneumatic butterfly valve drives the actuator through the compressed air to drive the circular disc to make a 90° rotary motion, which is used as a pipe switch and regulating flow. The pneumatic butterfly valve is operated by 0-90 degree opening and closing. That is, 0 degrees is the fully closed state, and 90 degrees is the fully open state. Add a positioner to the pneumatic actuator and input the corresponding signal to adjust the butterfly valve plate to 0-90 degrees. It can be used as a pneumatically regulated butterfly valve. In addition, a filter pressure reducing valve and a solenoid valve can be added to better control the use of the pneumatic butterfly valve.

Actuator Comparison: An actuator is a device in an automation technology tool that receives control information and exerts control over the controlled object. Actuators are classified into pneumatic, electric and hydraulic actuators according to the driving energy used. Electric actuators and pneumatic actuators are the current mainstream actuators. Our Guanliang valve analyzes the comparison between electric actuators and pneumatic actuators.

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