BALL
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Valve that has a ported ball that can be turned relative to the body seat ports
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BUTTERFLY
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Valve in which a streamlined disc pivots about a diametric axis
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CONFIGUREDGATE
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Screwdown valve in which the closing gate is shaped in a configured manner to have a more precise control of pressure and flow change across the valve
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GLAND
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Valve with a tapered seating, in which a rotatable plug is retained by means of a gland and gland packing
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GLOBE
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Screwdown valve that has a spherical body
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LUBRICATEDPLUG
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Plug valve in which a lubricant is injected under pressure between the plug face and the body
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NEEDLE
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Valve for regulating the flow in or from a pipe, in which a slender cone moves along the axis of flow to close against a fixed conical seat
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PARALLELSLIDE
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Screwdown valve that has a machined plate that slides in formed grooves to form a seal
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PLUG
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Plug valve in which a lubricant is injected under pressure between the plug face and the body
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WEDGEGATE
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Screwdown valve that has a wedge shaped plate fitting into tapered guides to form a seal
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OTHER
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required category not on scale
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NOTKNOWN
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Value is unkown
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UNSET
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Value has not been specified
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