The valve body parts of the electric valve and the pneumatic operated gate valve are the same. The main difference is that the actuator has different driving methods, one is pneumatic drive, and the other is electric drive. Electric valves are driven by motors, and pneumatic valves are driven by compressed air. Pneumatic operated gate valve is a valve whose valve body is opened and closed by compressed air, and an electric valve is a valve controlled by an electric actuator, so as to realize the opening and closing of the valve. Its action torque is larger than that of ordinary valves, its opening and closing speed is adjustable, its structure is simple, and it is easy to maintain.
So what is the difference between an electric valve and a pneumatic operated gate valve? I believe that this problem is also the first problem that many people encounter when choosing electric valves and pneumatic valves. Next, let's do an analysis and comparison to allow users to avoid various details when choosing a type. The price of these two kinds of valves is not much different, and how to choose the valve is mainly based on the analysis of the working conditions. The valve body parts of the electric valve and the pneumatic operated gate valve are the same. The main difference is that the actuator has different driving methods, one is pneumatic drive, and the other is electric drive. Electric valves are driven by motors, and pneumatic valves are driven by compressed air.
The action form of the electric valve actuator is divided into forward action, reaction, control form, adjustment type and switching type. When the input signal is interrupted, the working position of the control valve can be freely selected, and the explosion-proof grades are divided into EXDIIBT4, EXDIICT4, EXDIICT5 and EXDIICT6 explosion-proof grades.
The action forms of pneumatic operated gate valve actuators include single-acting, double-acting, control, regulation and switching input signals. The working position can be fully open, fully closed and adjustable configurable positioner with spring return function. Explosion-proof grades are also divided into SIL1, SIL2, SIL3, SIL4 and intrinsically safe explosion-proof grades.
How to choose electric valve and pneumatic operated gate valve needs to comprehensively consider their differences, advantages and disadvantages, working environment, technical requirements, pipeline size, pressure and temperature. The choice of electric valve and pneumatic operated gate valve first depends on the working conditions. Electric valve is used when electricity is convenient, and pneumatic valve is used when gas is convenient. If you want to switch quickly, or choose a pneumatic valve, switch quickly. Secondly, the fire pipeline still chooses pneumatic valves, because the valve positioner of the pneumatic actuator is far superior to the electric actuator. The explosion-proof requirements are not high, and the electric valve is preferred when the gas supply is inconvenient.