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2. Check valve - Wikipedia

   en.wikipedia.org/wiki/Check_valve

   Tilting-disc inconel check valve Check valve symbol on piping and instrumentation diagrams. The arrow shows the flow direction. Vertical lift check valve. A check valve, non-return valve, reflux valve, retention valve, foot valve, or one-way valve is a valve that normally allows fluid (liquid or gas) to flow through it in only one direction. [1]

3. 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 ...

4. 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.

5. Pneumatic circuit - Wikipedia

   en.wikipedia.org/wiki/Pneumatic_circuit

   A pneumatic circuit is an interconnected set of components that convert compressed gas (usually air) into mechanical work. In the normal sense of the term, the circuit must include a compressor or compressor-fed tank.

6. Control valve - Wikipedia

   en.wikipedia.org/wiki/Control_valve

   Pneumatic valve: Actuated using a compressible medium like air, hydrocarbon, or nitrogen, with a spring diaphragm, piston cylinder or piston-spring type actuator; Hydraulic valve: Actuated by a non-compressible medium such as water or oil; Electric valve: Actuated by an electric motor; A wide variety of valve types and control operation exist.

7. Aventics - Wikipedia

   en.wikipedia.org/wiki/Aventics

   Pneumatics uses compressed air as a drive medium. The company manufactures cylinders, [4] valves, valve systems, [5] as well as units for compressed air preparation and is increasingly focusing on electronic networking of system parts. Vacuum technology for non-contact transport systems, such as those used in the food industry [6] is an ...