4820-00-142-1020 VALVE,SAFETY RELIEF Index 4820-00-142-1029 VALVE,STOP-LIFT-CHECK

National Stock Number:
4820-00-142-1022

Federal Supply Class:
4820

National Item Identification Number:
001421022

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:
DD445S5103-3880064NAVAL SHIP SYSTEMS COMMAND
R6134A016497DRESSER, INC.


Techincal Specification:
BOLT HOLE NOMINAL DIAMETER0.187 INCHES SECOND END
BOLT CIRCLE NOMINAL DIAMETER5.875 INCHES FIRST END
BOLT CIRCLE NOMINAL DIAMETER7.125 INCHES SECOND END
BOLT HOLE NOMINAL DIAMETER0.812 INCHES FIRST END
BOLT HOLE QUANTITY8 FIRST END
BOLT HOLE QUANTITY8 SECOND END
CONNECTION TYPEFLANGE FIRST END
CONNECTION TYPEFLANGE SECOND END
DISK LOADING METHODSPRING
FLANGE FACE DESIGNRAISED STRAIGHT FIRST END
FLANGE FACE DESIGNPLAIN SECOND END
FLANGE SHAPEROUND WITH HOLES FIRST END
FLANGE SHAPEROUND WITH HOLES SECOND END
FLOW CONTROL DEVICEPOPPET
MATERIALSTEEL BODY
MATERIALSTEEL CORROSION RESISTING FLOW CONTROL DEVICE
MATERIALSTEEL CORROSION RESISTING SEAT
MATERIALSTEEL CORROSION RESISTING STEM
NOMINAL OUTSIDE DIAMETER7.500 INCHES FIRST END
NOMINAL OUTSIDE DIAMETER8.687 INCHES SECOND END
NOMINAL THICKNESS0.875 INCHES SECOND END
NOMINAL THICKNESS1.437 INCHES FIRST END
OPENING PRESSURE SETTING639.0 POUNDS PER SQUARE INCH
RAISED FACE NOMINAL DIAMETER4.125 INCHES FIRST END
RAISED FACE NOMINAL HEIGHT0.250 INCHES FIRST END
VALVE DISCHARGE FLOW RATE44700.0 POUNDS PER HOUR
VALVE OPERATION METHODAUTOMATIC
STYLE DESIGNATORANGLE


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