A special type of oil free, positive displacement reciprocating compressor, working without piston rings. The seal between piston and cylinder wall is produced by a series of labyrinths.

A deposit resulting from the oxidation and polymerization of fuels and lubricants when exposed to high temperatures. Similar to, but harder, than varnish.

A technique for predicting whether water will tend to dissolve or precipitate calcium carbonate. If the water precipitates calcium carbonate, scale forming may result. If the water dissolves calcium carbonate, it has a corrosive tendency.

Blended cylinder gas for laser operation-nitrogen, carbon dioxide, and helium.

Pounds.

An unintended loss of compressed air to ambient conditions.

An instrument designed to detect the ultrasonic emissions and convert them to audible signal.

The distance between the seat and disc seating surfaces when a valve is open.

An extrication tool, consisting of air sacs or bags, filler hoses, air regulator, control valves, and a supply of compressed air.

An air cylinder.

Filter parts that provide protection and support for the filter media.

A gas which, under a charged pressure, is partially liquid at a temperature of 70°F (21.1°C).

A liquid piston compressor is a rotary compressor in which a vaned rotor revolves in an elliptical casing, with the rotor spaces sealed by a ring of liquid rotating with it inside the casing.

A compressor in which a vaned rotor revolves in an elliptical stator, with the spaces between the rotor and stator sealed by a ring of liquid rotating with the impeller.

A liquid piston compressor is a rotary compressor in which a vaned rotor revolves in an elliptical casing, with the rotor spaces sealed by a ring of liquid rotating with it inside the casing.

Units typically reach over 200 feet in length, over 14 feet in diameter, and weigh more than 250 tons and are used to liquefy natural gas at major gas processing facilities around the world.

An electrical measurement; e.g., the output of one or several electric machines; load also denotes the power carried by a particular circuit.

A filter element so full of contaminants that it no longer can pass rated flow without an excessive pressure differential.

Ratio of average compressor load to the maximum rated compressor load over a given period of time.

Time period from when a compressor loads until it unloads.

Control method that allows the compressor to run at full-load or at no load while the driver remains at a constant speed.

A type of journal bearing in centrifugal air compressors.

In spray painting, the process of applying the final coat of paint at a lower air pressure. Used to apply uniformity to a finish or for blending.

A material (such as oil) used between moving parts of machinery to make the surfaces slippery and reduce friction.

An instrument designed to add lubrication into the compressed air line.

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