4820-01-283-1832 VALVE,SAFETY RELIEF Index 4820-01-283-1834 VALVE,BUTTERFLY

National Stock Number:
4820-01-283-1833

Federal Supply Class:
4820

National Item Identification Number:
012831833

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-4TT-2591816CIRCOR AEROSPACE, INC.
553814453711NAVAL SEA SYSTEMS COMMAND


Techincal Specification:
CONNECTION STYLEFLARED (TUBE) ALL ENDS
CONNECTION TYPETHREADED EXTERNAL TUBE ALL ENDS
FLOW CONTROL DEVICEPOPPET
OPERATING PRESSURE2500.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE
MATERIALSTEEL CORROSION RESISTING BODY
MAXIMUM OPERATING TEMP-65.0 FAHRENHEIT FIRST RESPONSE
MAXIMUM OPERATING TEMP275.0 FAHRENHEIT SECOND RESPONSE
MEDIA FOR WHICH DESIGNEDAIR FIRST RESPONSE
MEDIA FOR WHICH DESIGNEDALCOHOL, ETHYL SECOND RESPONSE
MEDIA FOR WHICH DESIGNEDAMMONIA, LIQUID FOURTH RESPONSE
MEDIA FOR WHICH DESIGNEDAMMONIA, GASEOUS THIRD RESPONSE
MEDIA FOR WHICH DESIGNEDREFRIGERANT 12 FIFTH RESPONSE
NOMINAL THREAD SIZE0.438 INCHES ALL ENDS
OPENING PRESSURE SETTING25.0 POUNDS PER SQUARE INCH
SEAT ANGLE37.0 DEGREES ALL ENDS
VALVE OPERATION METHODAUTOMATIC
STYLE DESIGNATORSTRAIGHT THRU NOTE: TO BE USED FOR VALVE BODIES OF ONE SECTION ONLY.
THREAD CLASS3A ALL ENDS
THREAD DIRECTIONRIGHT-HAND ALL ENDS
THREAD SERIES DESIGNATORUNIFIED NATIONAL JOINT FINE (UNJF) ALL ENDS
THREAD QUANTITY PER INCH20 ALL ENDS


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