1. The range of frequencies of a device within which its performance, in respect to some characteristic, conforms to a specified standard. 2. The range within the limits of a frequency band.

Related Terms

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.

ALUM

Is an aluminum sulfate or filter alum. Acts in the range of 5.0 to 8.0 pH.

ISO SOLID CONTAMINANT CODE (ISO 4406)

A code assigned on the basis of the number of particles per unit volume greater than 5 and 15 micrometers in size. Range numbers identify each increment in the particle population throughout the spectrum of levels.

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.

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.

AIR CONDITIONER

A refrigeration device cooling or heating air.

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