Glossary Of Terms
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V, W & Y
Valve:
A device used to control the flow of fluid contained in a pipe line.
WOG:
Water-oil-gas - a rating designation generally used for small valves chiefly in low ratings. Indicates maximum working pressure at ambient + 32° F to +100° F. Also called Nonshock Rating.
Working pressure:
The pressure (pounds per square inch) at which a valve is designed to operate.
Wall thickness:
The thickness of the wall of the pressure vessel or valve. For steel valves, minimum thickness requirements are defined in ASME B16.34, , and .
Worm gears:
A gear set in which the input shaft is offset from and perpendicular to the output shaft, and driving gear is very small and perpendicular to the driven gear. Worm gear operators are used on ball valves.
Yield strength:
The limiting stress beyond which a material will sustain permanent deformation.
Yoke:
The part of gate or globe valve which acts as a bracket to support the top or outer end of the stem and stem bearing.
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A device used to control the flow of fluid contained in a pipe line.
WOG:
Water-oil-gas - a rating designation generally used for small valves chiefly in low ratings. Indicates maximum working pressure at ambient + 32° F to +100° F. Also called Nonshock Rating.
Working pressure:
The pressure (pounds per square inch) at which a valve is designed to operate.
Wall thickness:
The thickness of the wall of the pressure vessel or valve. For steel valves, minimum thickness requirements are defined in ASME B16.34, , and .
Worm gears:
A gear set in which the input shaft is offset from and perpendicular to the output shaft, and driving gear is very small and perpendicular to the driven gear. Worm gear operators are used on ball valves.
Yield strength:
The limiting stress beyond which a material will sustain permanent deformation.
Yoke:
The part of gate or globe valve which acts as a bracket to support the top or outer end of the stem and stem bearing.
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