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A device that is installed to prevent the backwards flow of potentially contaminated water, gas, or other substance into any potable water supply or distribution piping.

Related Terms

RESTRICTOR

A device for producing a deliberate pressure drop or resistance in a line by reducing the cross-sectional flow area.

RESTRICTOR

A device for producing a deliberate pressure drop or resistance in a line by reducing the cross-sectional flow area.

SAFETY CONTROL

Device to stop unit, equipment or system if unsafe pressure and/or temperatures and/or dangerous conditions are reached.

AIR COOLER

A factory-encased assembly of elements whereby the temperature of air passing through the device is reduced.

FILTER ELEMENT

The porous device that performs the actual process of filtration. Also known as Cartridge

COMPRESSOR

A device which converts mechanical force and motion into pneumatic flow power.

COMPRESSOR

A device which converts mechanical force and motion into pneumatic flow power.

CORROSION INHIBITOR

Additive for protecting lubricated metal surfaces against chemical attack by water or other contaminants. There are several types of corrosion inhibitors. Polar compounds wet the metal surface preferentially, protecting it with a film of oil. Other compounds may absorb water by incorporating it in a water-in-oil emulsion so that only the oil touches the metal surface. Another type of corrosion inhibitor combines chemically with the metal to present a non- reactive surface.

REFRIGERATOR

A device to transfer heat from a low temperature to a high temperature medium.

AIR BREATHER

A device permitting air movement between atmosphere and the component in/ on which it is installed.
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