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Pressure in low side of refrigerating system; also called suction pressure or low-side pressure.

Fluid opening/closing such as a gauge opening or to seal the joint where the valve stem goes through the valve body.

Is the fraction of the gas turbine work used to drive the compressor.

Sound other than the wanted signal. In room acoustics, the irreducible noise level measured in the absence of any building occupants.

Backing in a form of a ring, generally used in welding of piping.

The counter-current flow of water through a resin bed (that is, in at the bottom of the exchange unit, out at the top) to clean and regenerate the bed after exhaustion (water treatment). Also, the pro [..]

Microscopic unicellular living organisms.

Plate or vane used to direct or control movement of fluid or air within confined area.

Are the nonflammable portion of the gas, such as carbon dioxide.