4820-01-451-2555 VALVE,SAFETY RELIEF Index 5935-01-451-2557 BACKSHELL,ELECTRICAL CONNECTOR

National Stock Number:
4820-01-451-2556

Federal Supply Class:
4820

National Item Identification Number:
014512556

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:
199016497DRESSER, INC.
1990C-1 X .75 135PSI16497DRESSER, INC.


Techincal Specification:
CONNECTION STYLEPLAIN (PIPE) FIRST END
CONNECTION STYLEPLAIN,OPTIONAL END(PIPE) SECOND END
CONNECTION TYPETHREADED EXTERNAL PIPE FIRST END
CONNECTION TYPETHREADED INTERNAL PIPE SECOND END
DISK LOADING METHODSPRING
FURNISHED ITEMS AND QUANTITY1 LEVER
FLOW CONTROL DEVICEDISK
OPERATING PRESSURE2000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE
MATERIAL DOCUMENT AND CLASSIFICATIONASTM A276 COND T ASSN STD SINGLE MATERIAL RESPONSE STEM
MATERIAL DOCUMENT AND CLASSIFICATIONASTM A479 ASSN STD SINGLE MATERIAL RESPONSE BODY
MATERIAL DOCUMENT AND CLASSIFICATIONASTM A479 ASSN STD SINGLE MATERIAL RESPONSE FLOW CONTROL DEVICE
MATERIALSTEEL COMP 316 BODY
MATERIALSTEEL COMP 316 FLOW CONTROL DEVICE
MATERIALSTEEL COMP 410 STEM
MAXIMUM OPERATING TEMP400.0 FAHRENHEIT SINGLE RESPONSE
MEDIA FOR WHICH DESIGNEDAIR FIRST RESPONSE
MEDIA FOR WHICH DESIGNEDSTEAM SECOND RESPONSE
MINIMUM OPERATING TEMP-20.0 FAHRENHEIT
NOMINAL THREAD SIZE0.750 INCHES FIRST END
NOMINAL THREAD SIZE1.000 INCHES SECOND END
OPENING PRESSURE SETTING135.0 POUNDS PER SQUARE INCH
SPECIAL FEATURESCARBON STEEL (PHOSPHATED) SRING;ORIFICE AREA 0.110 SQ IN.
VALVE OPERATION METHODAUTOMATIC
STYLE DESIGNATORANGLE
THREAD DIRECTIONRIGHT-HAND ALL ENDS
THREAD SERIES DESIGNATORNPT ALL ENDS


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