4820-00-287-2977 VALVE,SAFETY RELIEF Index 4820-00-287-2981 VALVE,SAFETY RELIEF

National Stock Number:
4820-00-287-2978

Federal Supply Class:
4820

National Item Identification Number:
002872978

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:
MILV2006581349MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
TYA1CLC3-4 400-298T0354SBU03950NAVAL INVENTORY CONTROL POINT MECHANICSBURG


Techincal Specification:
STYLE DESIGNATORANGLE FLANGED ENDS
VALVE OPERATION METHODAUTOMATIC
MATERIALCOPPER ALLOY BODY
COPPER ALLOY AND
NICKEL ALLOY FLOW CONTROL DEVICE
NICKEL ALLOY SEAT
NICKEL ALLOY STEM
VALVE SIZE0.750 INCHES
FLOW CONTROL DEVICEPOPPET
MEDIA FOR WHICH DESIGNEDAIR SINGLE RESPONSE
MAXIMUM OPERATING PRESSURE400.0 POUNDS PER SQUARE INCH SINGLE RESPONSE
CONNECTION TYPEUNTHREADED INTERNAL PIPE 1ST END
CONNECTION STYLESTREAMLINED WITH ONE BRAZING RING 1ST END
NOMINAL PIPE SIZE ACCOMMODATED0.750 INCHES 1ST END
BONNET TYPEEXPOSED SPRING
BONNET ATTACHMENT METHODUNION
DISK LOADING METHODSPRING
ADJUSTABLE PRESSURE RANGE136.0 TO 169.0 POUNDS PER SQUARE INCH
NONDEFINITIVE SPEC/STD DATAA1 TYPE AND
C CLASS
SPEC/STD CONTROLLING DATA
MANUFACTURERS CODE81349
NON-DEFINITIVE GOVERNMENT SPEC/STD REFERENCEMILV20065


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