WEAR SLEEVE
A replaceable metal ring generally used in assemblies to eliminate expensive shaft replacement caused by grooving that may occur at the seal-shaft interface.
WEATHERING
The surface deterioration of a rubber article during outdoor exposure, such as cracking, crazing, or chalking.
WEEPAGE
A minute amount of liquid leakage by a seal.
WELD IN BAFFLE
A baffle that is designed to be welded to the duct wall. This design can be either single or double acting type.
WELDING BLANKET
A fire resistant blanket that is placed over the expansion joint to protect it from weld splatter during field welding operation.
WHIP
Deflection of a shaft (usually on a mixer or pump) due to a rotating mechanical load. A long shaft that is not supported by bearings is more susceptible to whip than a short shaft or one that is supported by bearings.
WICKING
Leakage through a gasket, not around it.
WIPER RING
A ring of braided packing, used in conjunction with graphite foil rings to wipe a reciprocating valve stem clean of graphite particles and keep the graphite contained in the stuffing box.
WIRE-REINFORCED
A product containing wire(s) to give added strength, increased dimensional stability or crush resistance.
WORK PRESSURE
The maximum operating pressure encountered during normal service.