4820-00-142-1014 VALVE,SAFETY RELIEF Index 4820-00-142-1022 VALVE,SAFETY RELIEF

National Stock Number:
4820-00-142-1020

Federal Supply Class:
4820

National Item Identification Number:
001421020

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:
R-6134-AL38056ASHCROFT INC
R6134AL16497DRESSER, INC.


Techincal Specification:
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 NOMINAL DIAMETER0.812 INCHES SECOND END
BOLT HOLE QUANTITY8 FIRST END
BOLT HOLE QUANTITY9 SECOND END
BONNET ATTACHMENT METHODBOLTED
BONNET TYPEEXPOSED SPRING
CONNECTION TYPEFLANGE FIRST END
CONNECTION TYPEFLANGE SECOND END
DISK LOADING METHODSPRING
FEATURES PROVIDEDVALVE STEM LOCK SHIELD
FIRST CONNECTION FACE TO CENTERLINE DISTANCE6.000 INCHES
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 DEVICEDISK
NOMINAL OUTSIDE DIAMETER7.500 INCHES FIRST END
NOMINAL OUTSIDE DIAMETER8.688 INCHES SECOND END
NOMINAL THICKNESS0.750 INCHES SECOND END
NOMINAL THICKNESS1.125 INCHES FIRST END
OPENING PRESSURE SETTING630.0 POUNDS PER SQUARE INCH
RAISED FACE NOMINAL DIAMETER4.125 INCHES FIRST END
RAISED FACE NOMINAL HEIGHT0.250 INCHES FIRST END
SECOND CONNECTION FACE TO CENTERLINE DISTANCE5.312 INCHES
VALVE DISCHARGE FLOW RATE49500.0 POUNDS PER HOUR
VALVE OPERATION METHODAUTOMATIC OR MANUAL
VALVE SIZE2.500 INCHES
STYLE DESIGNATORANGLE FLANGED ENDS


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