4820-01-178-2938 VALVE,CHECK Index 4810-01-178-2940 VALVE,SAFETY RELIEF

National Stock Number:
4820-01-178-2939

Federal Supply Class:
4820

National Item Identification Number:
011782939

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:
2R293499240CRISSAIR INC
TE2052180206NAVAL AIR DEVELOPMENT CENTER WARMINSTER NAVAIRSYSCOM HQ


Techincal Specification:
CONNECTION TYPETHREADED EXTERNAL TUBE ALL ENDS
CONNECTION STYLEFLARELESS (TUBE) ALL ENDS
FLOW CONTROL DEVICEPOPPET
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-A-225/6 FED SPEC SINGLE MATERIAL RESPONSE FLOW CONTROL DEVICE
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-A-225/6 FED SPEC SINGLE MATERIAL RESPONSE BODY
MATERIALALUMINUM ALLOY 2024 BODY
MATERIALALUMINUM ALLOY 2024 FLOW CONTROL DEVICE
MAXIMUM OPERATING TEMP275.0 FAHRENHEIT SINGLE RESPONSE
MAXIMUM OPERATING PRESSURE140.0 POUNDS PER SQUARE INCH SINGLE RESPONSE
MEDIA FOR WHICH DESIGNEDOIL, HYDRAULIC SINGLE RESPONSE
NOMINAL THREAD SIZE0.438 INCHES 2ND END
NOMINAL THREAD SIZE0.562 INCHES 1ST END
OPENING PRESSURE SETTING120.0 POUNDS PER SQUARE INCH
SEAT ANGLE12.0 DEGREES ALL ENDS
STYLE DESIGNATORSTRAIGHT THRU NOTE: TO BE USED FOR VALVE BODIES OF ONE SECTION ONLY.
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-A-8625,TYPE 2 MIL SPEC SINGLE TREATMENT RESPONSE
SURFACE TREATMENTANODIZE
THREAD DIRECTIONRIGHT-HAND ALL ENDS
THREAD CLASS3A ALL ENDS
THREAD SERIES DESIGNATORUNJF ALL ENDS
THREAD QUANTITY PER INCH18 1ST END
THREAD QUANTITY PER INCH20 2ND END
VALVE DISCHARGE FLOW RATE1.0 GALLONS PER MINUTE
VALVE OPERATION METHODAUTOMATIC


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