4820-00-618-7820 VALVE,SAFETY RELIEF Index 4820-00-618-7822 VALVE,SAFETY RELIEF

National Stock Number:
4820-00-618-7821

Federal Supply Class:
4820

National Item Identification Number:
006187821

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:
51847173030HAMILTON SUNDSTRAND CORPORATION
824A4TT491816CIRCOR AEROSPACE, INC.


Techincal Specification:
CONNECTION STYLEEXTERNAL SEAT FOR GASKET SEAL (BOSS) FIRST END
CONNECTION TYPETHREADED EXTERNAL BOSS FIRST END
DISK LOADING METHODSPRING
FLOW CONTROL DEVICEPOPPET
OPERATING PRESSURE600.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-A-225/6 FED SPEC SINGLE MATERIAL RESPONSE BODY
MATERIALALUMINUM ALLOY 2024 BODY
MAXIMUM OPERATING TEMP480.0 FAHRENHEIT SINGLE RESPONSE
MOUNTING POSITIONHORIZONTAL OR VERTICAL
NOMINAL THREAD SIZE0.438 INCHES FIRST END
SEAT ANGLE37.0 DEGREES FIRST END
SPECIAL FEATURESNON-STANDARD CRACKING PRESSURE 8 IN. H2O
VALVE OPERATION METHODAUTOMATIC
STYLE DESIGNATORSTRAIGHT THRU
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-A-8625,TY 1 MIL SPEC SINGLE TREATMENT RESPONSE
SURFACE TREATMENTANODIZE
THREAD CLASS3A FIRST END
THREAD DIRECTIONRIGHT-HAND FIRST END
THREAD SERIES DESIGNATORUNIFIED NATIONAL JOINT FINE (UNJF) FIRST END


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