4820-01-338-2021 VALVE,SAFETY RELIEF Index 4820-01-338-2023 VALVE,SAFETY RELIEF

National Stock Number:
4820-01-338-2022

Federal Supply Class:
4820

National Item Identification Number:
013382022

Description:
VALVE,SAFETY RELIEF

Detail:
A valve designed to automatically release excessive pressures. It is actuated by static pressure upstream of the valve and is used as a safety valve or relief valve, and may be set to close at a predetermined pressure. It is not designed for regulation of continuously fluctuating loads. It may be inline or cartridge (manifold) design. Excludes VALVE (1), RELIEF, PRESSURE AND TEMPERATURE.


Manufacturer Information:
5177T-6TB-28091816CIRCOR AEROSPACE, INC.


Techincal Specification:
STYLE DESIGNATORSTRAIGHT THRU NOTE: TO BE USED FOR VALVE BODIES OF SEPARABLE SECTIONS.
VALVE OPERATION METHODAUTOMATIC
MATERIALSTEEL COMP 303 BODY
RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR SEAT
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-P-25732 MIL SPEC SINGLE MATERIAL RESPONSE SEAT
FLOW CONTROL DEVICEPOPPET
MEDIA FOR WHICH DESIGNEDAIR 1ST RESPONSE
ALCOHOL, ETHYL 2ND RESPONSE
AMMONIA, GASEOUS 3RD RESPONSE
AMMONIA, LIQUID 4TH RESPONSE
REFRIGERANT 12 5TH RESPONSE
MAXIMUM OPERATING PRESSURE2500.0 POUNDS PER SQUARE INCH SINGLE RESPONSE
MAXIMUM OPERATING TEMP-65.0 DEG FAHRENHEIT 1ST RESPONSE
275.0 DEG FAHRENHEIT 2ND RESPONSE
CONNECTION TYPETHREADED EXTERNAL TUBE 1ST END
THREADED INTERNAL BOSS 2ND END
CONNECTION STYLEFLARED (TUBE) 1ST END
GASKET SEAL(BOSS) 2ND END
SEAT ANGLE37.0 DEGREES 1ST END
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED0.375 INCHES 2ND END
THREAD SERIES DESIGNATORUNJF 1ST END
UNF 2ND END
NOMINAL THREAD SIZE0.562 INCHES ALL ENDS
THREAD CLASS3A 1ST END
3B 2ND END
THREAD DIRECTIONRIGHT-HAND ALL ENDS
DISK LOADING METHODWEIGHT
OPENING PRESSURE SETTING280.0 POUNDS PER SQUARE INCH


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