What is the definition of a pneumatic actuator for valves? A pneumatic actuator for valves is a device used to control the opening and closing of a valve automatically. It uses compressed air to move a piston or diaphragm to actuate the valve. The piston or diaphragm is connected to a stem, which is connected to a valve stem. The valve stem is connected to the valve, which can be opened or closed depending on the position of the actuator. In most cases, the actuator is controlled by a pressure switch that monitors the pressure in the system. When the pressure reaches a pre-determined level, the pressure switch triggers the actuator to move the valve stem, thereby opening or closing the valve.
Pneumatic actuators are generally used in industries where compressed air is available, such as in the chemical, oil, gas and food industries. They are mostly used to control process valves, but can also be