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Glossary of Pneumatic Terms
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Accumulator. A container in which fluid is stored under pressure as a source of fluid power.
Accumulator, Hydropneumatic Bladder. A hydro pneumatic accumulator in which the liquid and gas are separated by an elastic bag or bladder.
Acetal Plastic. Tough, stable engineering thermoplastic with a high modulus of elasticity, high strength, good rigidity, dimensional stability, resistance to moisture, solvents and other chemicals.
Active Device. A device that has an input(s) that controls a power supply to the device.
Actuator. A device in which power is transferred from one pressurized medium to another without intensification.
Additive. A chemical added to fluid to impart new properties or to enhance those that already exist.
Air Motor. A device that converts pneumatic fluid power into mechanical torque and motion. It usually provides rotary mechanical motion.
Air, Compressed (pressure). Air at any pressure greater than atmosphere.
Air, Dried. Air with moisture content lower than the maximum allowed for a given application.
Air, Free. Air at ambient temperature, pressure, relative humidity and density.
Air, Saturated. Air at 100% relative humidity with a dew point equal to temperature.
Air, Standard. Air at a temperature of 68.8° F, a pressure of 14.7 pounds per square inch absolute, and a relative humidity of 36% (0.0750 pounds per cubic foot). In gas industries the temperature of “standard air” is usually given as 60.8° F.
Air. A gas mixture consisting of nitrogen, oxygen, argon, carbon dioxide, hydrogen and small quantities of neon, helium and other gases.
Air Bleeder. A device for the removal of air.
Air Breather. A device permitting air movement between atmosphere and the component in which it is installed
Air Motor. A device which converts pneumatic power into mechanical force and motion which usually provides rotary mechanical motion.
Amplification. The ration between the output