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2. Air-operated valve - Wikipedia

   en.wikipedia.org/wiki/Air-operated_valve

   An air-operated valve, also known as a pneumatic valve, is a type of power-operated pipe valve that uses air pressure to perform a function similar to a solenoid. As air pressure is increased, the compressed air starts to push against the piston or diaphragm walls which causes the valve to actuate. Whether the valve opens or closes depends on ...

3. Pneumatic circuit - Wikipedia

   en.wikipedia.org/wiki/Pneumatic_circuit

   In general, based on the application, a pneumatic cylinder is usually a single-acting cylinder, where there is a single port in the cylinder. In single-acting cylinders, the port extends using compressed air and retracts using an open coiled spring. In double-acting cylinders, two ports both extend and retract using compressed air.

4. Pneumatic cylinder - Wikipedia

   en.wikipedia.org/wiki/Pneumatic_cylinder

   A single-acting cylinder (SAC) has one port, which allows compressed air to enter and for the rod to move in one direction only. The high pressure of the compressed air causes the rod to extend as the cylinder chamber continues to fill. When the compressed air leaves the cylinder through the same port the rod is returned to its original position.

5. Valve actuator - Wikipedia

   en.wikipedia.org/wiki/Valve_actuator

   Air (or other gas) pressure is the power source for pneumatic valve actuators. [1] They are used on linear or quarter-turn valves. Air pressure acts on a piston or bellows diaphragm creating linear force on a valve stem. Alternatively, a quarter-turn vane-type actuator produces torque to provide rotary motion to operate a quarter-turn valve.

6. Control valve - Wikipedia

   en.wikipedia.org/wiki/Control_valve

   Globe control valve with pneumatic diaphragm actuator and "smart" positioner which will also feed back to the controller the actual valve position. Taking the example of an air-operated valve, there are two control actions possible: "Air or current to open" – The flow restriction decreases with increased control signal value. "Air or current ...

7. Single- and double-acting cylinders - Wikipedia

   en.wikipedia.org/wiki/Single-_and_double-acting...

   Typical horizontal steam engine with double-acting cylinder. A double-acting cylinder is a cylinder in which the working fluid acts alternately on both sides of the piston. . In order to connect the piston in a double-acting cylinder to an external mechanism, such as a crank shaft, a hole must be provided in one end of the cylinder for the piston rod, and this is fitted with a gland or ...