Can the air opening and air closing of the control valve be called?

With the increase of air pressure signal sent to the actuator, the gradual opening of the regulating valve is called air opening, and vice versa. The choice of gas switch mode mainly depends on the safety conditions in process production. Generally speaking, when the regulating valve is fully open, it is more dangerous for the production process or equipment to open the gas; When the regulating valve is fully closed, if the production process or equipment is in danger, the gas should be turned on.