What are the characteristics of pneumatic control valve compared with electric control valve? Is its controllable minimum flow and leakage the same thing? Why?

The pneumatic valve is simple in structure, safe and explosion-proof, and easy to realize fault safety; The accuracy is low, and gas supply equipment and signal conversion accessories are needed.

The electric valve has high control precision, can be used when there is electricity, and can bring many related functions; The explosion-proof grade is lower than that of pneumatic valve, so it is very troublesome to realize fault safety.

Controllable minimum flow is the characteristic of control valve, and it is a parameter that can be selected in type selection calculation.

Leakage is the flow through the regulating valve when it is completely closed. Ideally, it is zero. In fact, it is very difficult to do so, but there are strict allowable standards.