The control ring in a valve which surrounds the seat, used to
control pre open and blow down.
Water cooled
compressors
Machines cooled by water circulated through jackets
surrounding the cylinders or casings.
Wet bulb temperature
Is used in psychrometry and is the temperature recorded by a
thermometer whose bulb has been covered with a wetted wick and
whirled on a sling psychrometer. Taken with the dry bulb, it
permits determination of relative humidity of the atmosphere.
Wet gas
Is any gas or gas mixture in which one or more of the
constituents is at its saturated vapor pressure. The constituent
at saturation pressure may or may not be water vapor.
Wet helical lobe
unit
Is one which 1) handles a small constant flow of liquid with
the gas; 2) utilizes evaporative (injection) cooling; or 3)
circulates a liquid for sealing and/or cooling. The last may or
may not be evaporative cooling.
Wicking
The vertical absorption of a liquid into a porous material by capillary forces.
Winch
An air operated device for hoisting or pulling. Similar to a
slusher or tugger
WMW
Welded Minimum Wall tubing
WOG
WOG - A pressure rating in psi for valves. W. Water, O. Oil, G. Gas
Work
Is energy in transition and is defined in units of Force times
Distance. Work cannot be done unless there is movement.
Working pressure
The normal working pressure for an air motor (6 bar).
