Gate valve (manual, electric, pneumatic)

1. Differences in control methods:

1. Manual valve: Manual valve is to control the flow and pressure of the medium by manually operating the handle, hand wheel, etc. The control method of manual valve is simple, easy to operate, does not require additional power source, and has low cost.

2. Pneumatic valve: Pneumatic valve is to control the opening and closing of the valve through air pressure, and can be remotely controlled using pneumatic actuators. The control mode of the pneumatic valve is reliable, the response speed is fast, the precision is high, and it is suitable for the occasions of large flow and high precision control

3. The electric valve is driven by the motor to open and close the valve, and can be controlled remotely using automation equipment such as PLC. The control method of electric valve has high precision and fast response speed, which is suitable for occasions requiring frequent control and high degree of automation.

Second, the difference in control accuracy

1. Manual valve: The control accuracy of manual valve is affected by manual operation, and the accuracy is relatively low, but for some occasions where the control requirements are not high, the manual valve is enough to use.

2. Pneumatic valve: The control accuracy of pneumatic valve is relatively high, the response speed is fast, and high precision flow and pressure control can be achieved, which is suitable for occasions with high control accuracy requirements.

3. Electric valve: The control accuracy of electric valve is relatively high, which can achieve high-precision flow and pressure control, and is suitable for occasions where the control accuracy is very high.

Third, the difference between applicable scenarios

1. Manual valve: Manual valve is suitable for small flow, low pressure occasions, control requirements are not high, manual operation is convenient occasions.

2. Pneumatic valve: Pneumatic valve is suitable for large flow, high pressure occasions, need high-precision control occasions, suitable for occasions with a high degree of automation.

3. Electric valve: Electric valve is suitable for large flow, high pressure occasions, need high-precision control occasions, suitable for high degree of automation, demanding environmental requirements, frequent control occasions.

Manual valves, pneumatic valves and electric valves have their own applicable scenarios and characteristics. When selecting the valve, it is necessary to choose the most suitable control mode and type according to the actual needs and scenarios. It should be noted that when selecting the valve, it is also necessary to consider factors such as materials, sealing performance, and pressure to ensure the use effect and safety of the valve.