4820-01-200-8555 VALVE,REGULATING,FLUID PRESSURE Index 4810-01-200-8557 VALVE,BUTTERFLY

National Stock Number:
4820-01-200-8556

Federal Supply Class:
4820

National Item Identification Number:
012008556

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:
1900D16497DRESSER, INC.
1900D-1912DC 4416497DRESSER, INC.
1900D-1912DC 448PSI BBT16497DRESSER, INC.
1912-00D-2-CC-MS-31-RF-LA-H16497DRESSER, INC.
1912DC-00-2MS-31-RF-LA16497DRESSER, INC.


Techincal Specification:
BOLT CIRCLE NOMINAL DIAMETER3.500 INCHES SECOND END
BOLT CIRCLE NOMINAL DIAMETER4.750 INCHES FIRST END
BOLT HOLE NOMINAL DIAMETER0.750 INCHES FIRST END
BOLT HOLE NOMINAL DIAMETER0.750 INCHES SECOND END
BONNET ATTACHMENT METHODBOLTEDBOLTED
BONNET TYPEINSIDE SPRINGINSIDE SPRING
CONNECTION TYPEFLANGE FIRST END
DISK LOADING METHODSPRINGSPRING
FIRST CONNECTION FACE TO CENTERLINE DISTANCE4.500 INCHES
FLANGE FACE DESIGNRAISED STRAIGHT FIRST END
FLANGE SHAPEROUND WITH HOLES FIRST END
FLANGE SHAPEROUND WITH HOLES SECOND END
FLOW CONTROL DEVICEDISKDISK
MATERIALSTEEL CORROSION RESISTING BODY
MATERIALSTEEL CORROSION RESISTING FLOW CONTROL DEVICE
NOMINAL OUTSIDE DIAMETER6.000 INCHES FIRST END
NOMINAL OUTSIDE DIAMETER4.875 INCHES SECOND END
NOMINAL THICKNESS0.688 INCHES FIRST END
NOMINAL THICKNESS0.688 INCHES SECOND END
OPENING PRESSURE SETTING448.0 POUNDS PER SQUARE INCH
RAISED FACE NOMINAL DIAMETER3.625 INCHES FIRST END
RAISED FACE NOMINAL HEIGHT0.062 INCHES FIRST END
SECOND CONNECTION FACE TO CENTERLINE DISTANCE4.125 INCHES
SPECIAL FEATURESWITH NOZZLE ON INLET END
VALVE OPERATION METHODAUTOMATICAUTOMATIC
VALVE SIZE1.000 INCHES


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