4820-01-171-4390 VALVE,CHECK Index 4820-01-171-4392 VALVE,SAFETY RELIEF

National Stock Number:
4820-01-171-4391

Federal Supply Class:
4820

National Item Identification Number:
011714391

Description:
VALVE,CHECK

Detail:
A valve permitting flow in one direction only. It does not have a stem, except when equipped with a lever and weight and has no pressure adjustment. It may be inline or cartridge (manifold) design.


Manufacturer Information:
4C264099240CRISSAIR INC
4C2640-199240CRISSAIR INC
ST7M26076301THE BOEING COMPANY
ST7M260-476301THE BOEING COMPANY


Techincal Specification:
CONNECTION STYLEEXTERNAL SEAT FOR GASKET SEAL (BOSS) SECOND END
CONNECTION STYLEPLAIN (TUBE) FIRST END
CONNECTION TYPETHREADED EXTERNAL BOSS SECOND END
CONNECTION TYPETHREADED EXTERNAL TUBE FIRST END
DISK LOADING METHODSPRING
FLOW CONTROL DEVICEPOPPET
MATERIALSTEEL CORROSION RESISTING BODY
MATERIALSTEEL FLOW CONTROL DEVICE
MEDIA FOR WHICH DESIGNEDFUEL/OIL, HYDROCARBON SINGLE RESPONSE
MOUNTING POSITIONHORIZONTAL OR VERTICAL
NOMINAL THREAD SIZE0.438 INCHES FIRST END
NOMINAL THREAD SIZE0.563 INCHES SECOND END
OPERATING PRESSURE-65.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM FIRST RESPONSE
OPERATING PRESSURE450.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SECOND RESPONSE
SEAT ANGLE45.0 DEGREES FIRST END
VALVE OPERATION METHODAUTOMATIC
STYLE DESIGNATORSTRAIGHT THRU
THREAD CLASS3A ALL ENDS
THREAD DIRECTIONRIGHT-HAND ALL ENDS
THREAD QUANTITY PER INCH20 SECOND END
THREAD SERIES DESIGNATORUNIFIED NATIONAL JOINT FINE (UNJF) FIRST END
THREAD SERIES DESIGNATORUNJS SECOND END


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