The pneumatic gate valve is a valve whose body is opened and closed by a Compressed air, and the electric valve is a valve controlled by an electric actuator, thus realizing the opening and closing of the valve. Its action torque than ordinary valves, open and close speed adjustable, simple structure, easy to maintain. So What's the difference between an electric valve and a pneumatic gate valve? Believe that this problem is also a lot of people in the choice of electric valve and pneumatic valve when the first encounter the problem. Let's do an analysis comparison so that users can avoid all the details when choosing a type. The two valves have little difference in price, mainly based on the analysis of how to select the valve working conditions. Electric valve and pneumatic gate valve body parts are the same, the main difference is that the actuator has different driving mode, one is pneumatic drive, one is electrical drive. The electric valve is driven by a motor, and the pneumatic valve is driven by a Compressed air.

The difference between electric valve and pneumatic gate valve: 1, electric valve actuator action is divided into positive action, reaction, control form, regulation type and switch type. When the input signal (4 ~ 20mA, 4 ~ 12mA, 12 ~ 20mA, 0 ~ 10mA) is interrupted, the working position of the control valve can be chosen freely. The explosion-proof grade is divided into EXDIIBT4, EXDIICT4, EXDIICT5 and EXDIICT6. 2. The actuators of pneumatic gate valve have single-acting, double-acting, controlling, regulating and switching input signals (4 ~ 20mA, 4 ~ 12mA, 12 ~ 20mA) . Air supply pressure (140 ~ 400kpa) . The working position can be a fully open, fully closed and adjustable configurable positioner with a spring return function. Explosion-proof grade is also divided into SIL1, SIL2, SIL3, SIL4 and intrinsic safety explosion-proof grade.

Electric valve and pneumatic gate valve advantages and disadvantages analysis: electric valve: 1, the advantages of electric valve is more suitable for large diameter pipeline valve matching, power as power, torque value enough. In addition, the handwheel mechanism can be attached, and explosion-proof and protection grade can be selected. Electric valves are not affected by climate or Air compressor pressure. 2, the disadvantage of electric valve is not easy to use in wet environment, open and close the process is slow, need 15 seconds to complete the entire valve open and close action, if not meet some open and close time requirements, the cost will be higher. Pneumatic gate valve: 1, pneumatic valve is more suitable for the advantages of small and medium-sized pipelines. It is driven by Compressed air. Under the condition of stable air pressure, it can open and close quickly for about 2.5 seconds. It has the advantages of free opening and closing, low cost and convenient maintenance. The disadvantage of pneumatic valves is that they are susceptible to air pressure fluctuations, especially in the winter due to moisture in the Compressed air and freezing in cold weather, which can cause the drive part to freeze and cause the cylinder to lose control, no response.

Electric valve and pneumatic gate valve selection method: How to select electric valve and pneumatic gate valve, the differences, advantages and disadvantages, working environment, technical requirements, pipe size, pressure and temperature should be considered comprehensively. The choice of electric valve and pneumatic gate valve first depends on the working conditions. When the electricity is convenient, use the electric valve, when the gas is convenient, use the pneumatic valve. If you want to switch quickly, or select the pneumatic valve, switch quickly. Secondly, pneumatic valve is still used in fire pipeline, because pneumatic actuator valve positioner is much better than electric actuator. Explosion-proof requirements are not high, gas supply is not convenient when the preferred electric valve.