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H6 - Federal Item Name Directory
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16994
VALVE,WEIGHTED CONTROL,PISTON
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FIIG: A046B0
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Entry Date: Apr-01-1974
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Concept: 1
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Status: A
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Applicability: BB
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Type: 0
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Definition: A valve consisting of a ported, dead weighted, hollow piston which moves vertically across the inlet passage within the valve body. Changes in the pressure controlled position of the piston vary the effective area of the ports exposed to the inlet flow in such a manner as to maintain a constant outlet line pressure. It has no seats or disk. For dead weight loaded pressure regulating valve of seat and disk construction, see also VALVE, REGULATING, FLUID PRESSURE.
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Basic INC: 70646
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Basic Name: VALVE
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Description: 1. A mechanism designed to control the flow of liquids or gases either within a closed system such as a pipeline or between the atmosphere and a closed system. It may be manually and/or power operated, actuated by predetermined pressure and/or temperature, or a pressure and/or temperature differential. Excludes: FAUCET (as modified); COCK (as modified); and THERMOSTAT (as modified).
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Corresponding NIINs: 23
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