Vapour phase or state of a substance

A gas which will not form into a liquid under normal pressure-temperature conditions (in a refrigeration system this is often air)

Device for controlling flow of gas

A resilient or flexible material used between mating surfaces of refrigerating unit parts or of refrigerator doors to provide a leak proof seal

A joint sealing device made of rubber or plastic foam strips

Instrument for measuring pressures both below and above atmospheric pressure

Instrument for measuring pressures in range of 0 psig and 500 psig (0 bar to 35 bar)

Instrument for measuring pressures in range of 30" Hg and 120 psig ( bar to 9 bar)

A device constructed to hold compound and high pressure gauges and valved to control flow of fluids through it

Instrument used to measure pressures below atmospheric pressure. Normally measured in Torr or mbar. 1 Torr = 1.33 mbar

A unit of weight and equal to one 7000th of a pound. It is used to indicate the amount of moisture in the air

A plastic metal or rubber doughnut-shaped protector for wires or tubing as they pass through hole in object

An electrical wire which will safely conduct electricity from a structure into the ground

A fault in an electrical circuit allowing electricity to flow into the metal parts of the structure