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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. Air-line fitting - Wikipedia

   en.wikipedia.org/wiki/Air-line_fitting

   30 20/30 H US Industrial 3/8" HP 8 ISO 6150C 170.08 381 84 ARO 310 9 014.09 40 AA Scandinavian 9.5/10 9.5/10 032.10 408 32/1800 Eurostandard 10 10 027 410 27 Schrader 1/2" 017.10 TL US Industrial 1/2" 11 A-A-59439, ISO 6150B 037 550 37 20/30 G US Industrial 1/2" HP 11 ISO 6150C 170.11 471 Tru-Flate/Automotive 1/2" 10 G German/Walther 12 12 200.12

4. Compressed air - Wikipedia

   en.wikipedia.org/wiki/Compressed_air

   An early major application of compressed air was in the drilling of the Mont Cenis Tunnel in Italy and France in 1861, where a 600 kPa (87 psi) compressed air plant provided power to pneumatic drills, increasing productivity greatly over previous manual drilling methods. Compressed-air drills were applied at mines in the United States in the 1870s.

5. Bleed air - Wikipedia

   en.wikipedia.org/wiki/Bleed_air

   Bleed air in aerospace engineering is compressed air taken from the compressor stage of a gas turbine, upstream of its fuel-burning sections.Automatic air supply and cabin pressure controller (ASCPC) valves bleed air from low or high stage engine compressor sections; low stage air is used during high power setting operation, and high stage air is used during descent and other low power setting ...

6. Flow coefficient - Wikipedia

   en.wikipedia.org/wiki/Flow_coefficient

   A simplified version of the definition is: The k v factor of a valve indicates "The water flow in m 3 /h, at a pressure drop across the valve of 1 kgf/cm 2 when the valve is completely open. The complete definition also says that the flow medium must have a density of 1000 kg/m 3 and a kinematic viscosity of 10 −6 m 2 /s , e.g. water.

7. Pressure regulator - Wikipedia

   en.wikipedia.org/wiki/Pressure_regulator

   A typical nominal regulated gauge pressure from a medical oxygen regulator is 3.4 bars (50 psi), for an absolute pressure of approximately 4.4 bar and a pressure ratio of about 4.4 without back pressure, so they will have choked flow in the metering orifices for a downstream (outlet) pressure of up to about 2.3 bar absolute.