4820-01-222-7811 VALVE,SAFETY RELIEF Index 4820-01-222-7813 VALVE,SAFETY RELIEF

National Stock Number:
4820-01-222-7812

Federal Supply Class:
4820

National Item Identification Number:
012227812

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:
559A-4DB-1491816CIRCOR AEROSPACE, INC.
80762296214RAYTHEON COMPANY
807622-196214RAYTHEON COMPANY


Techincal Specification:
CONNECTION TYPETHREADED EXTERNAL TUBE 1ST END
CONNECTION TYPETHREADED INTERNAL TUBE 2ND END
CONNECTION STYLEFLARE(TUBE) 2ND END
CONNECTION STYLEPLAIN (TUBE) 1ST END
FLOW CONTROL DEVICEDISK
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-A-25/6 FED SPEC SINGLE MATERIAL RESPONSE BODY
MATERIALALUMINUM ALLOY 2024 BODY
MAXIMUM OPERATING TEMP250.0 FAHRENHEIT SINGLE RESPONSE
MEDIA FOR WHICH DESIGNEDACETYLENE 2ND RESPONSE
MEDIA FOR WHICH DESIGNEDAIR 1ST RESPONSE
MEDIA FOR WHICH DESIGNEDHYDROGEN 4TH RESPONSE
MEDIA FOR WHICH DESIGNEDREFRIGERANT 12 3RD RESPONSE
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED0.250 INCHES 2ND END
NOMINAL THREAD SIZE0.438 INCHES ALL ENDS
OPENING PRESSURE SETTING14.0 POUNDS PER SQUARE INCH
STYLE DESIGNATORSTRAIGHT THRU NOTE: TO BE USED FOR VALVE BODIES OF ONE SECTION ONLY.
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-A-8625 MIL SPEC SINGLE TREATMENT RESPONSE
SURFACE TREATMENTANODIZE
THREAD CLASS3A 1ST END
THREAD CLASS3B 2ND END
THREAD DIRECTIONRIGHT-HAND ALL ENDS
THREAD SERIES DESIGNATORUNS ALL ENDS
THREAD QUANTITY PER INCH18 ALL ENDS
VALVE OPERATION METHODAUTOMATIC


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