What determines the size of the air inlet and outlet holes on a pneumatic actuator?
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May I ask, for pneumatic ball valves and pneumatic butterfly valves that are commonly used, how is the size of the air inlet and outlet ports connected to the solenoid valve on their pneumatic actuators determined? What is the basis for such calculations? (Some of these ports are 1/4\" in size, while others are 3/8\" etc.)
It is determined by the manufacturer, mainly based on the switching speed.
What was said upstairs is correct; in the absence of any special requirements, the manufacturer selects the standard inlet and outlet specifications based on the cylinder diameter. For valves with special requirements, especially those subject to SIS regulations, the required inlet and outlet specifications must be determined based on the valve’s opening and closing speed, with the gas filling and discharge speed serving as the basis for this calculation. At this point, quick exhaust valves or speed increase devices must be installed at the inlet and outlet.
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