4820-00-142-1541 VALVE,SAFETY RELIEF Index 4820-00-142-1547 VALVE,SAFETY RELIEF

National Stock Number:
4820-00-142-1543

Federal Supply Class:
4820

National Item Identification Number:
001421543

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.


Techincal Specification:
ADJUSTABLE PRESSURE RANGE+900.0 TO 1100.0 POUNDS PER SQUARE INCH
BOLT HOLE NOMINAL DIAMETER0.562 INCHES 2ND END
BOLT HOLE NOMINAL DIAMETER0.688 INCHES 1ST END
BOLT HOLE QUANTITY4 1ST END
BOLT HOLE QUANTITY4 2ND END
BONNET ATTACHMENT METHODBOLTED
BONNET TYPEEXPOSED SPRING
BOLT CIRCLE NOMINAL DIAMETER3.125 INCHES 2ND END
BOLT CIRCLE NOMINAL DIAMETER3.500 INCHES 1ST END
CONNECTION TYPEFLANGE 1ST END
CONNECTION TYPEFLANGE 2ND END
DISK LOADING METHODSPRING
FIRST CONNECTION FACE TO CENTERLINE DISTANCE3.250 INCHES
FLANGE FACE DESIGNPLAIN 2ND END
FLANGE FACE DESIGNRAISED STRAIGHT 1ST END
FLANGE SHAPEROUND WITH HOLES 1ST END
FLANGE SHAPEROUND WITH HOLES 2ND END
FLOW CONTROL DEVICEDISK
MATERIALSTEEL BODY
MATERIALSTEEL CORROSION RESISTING FLOW CONTROL DEVICE
MATERIALSTEEL CORROSION RESISTING SEAT
MATERIALSTEEL STEM
MAXIMUM OPERATING PRESSURE600.0 POUNDS PER SQUARE INCH SINGLE RESPONSE
MEDIA FOR WHICH DESIGNEDWATER, FRESH SINGLE RESPONSE
NOMINAL OUTSIDE DIAMETER4.250 INCHES 2ND END
NOMINAL OUTSIDE DIAMETER4.875 INCHES 1ST END
NOMINAL THICKNESS0.438 INCHES 2ND END
NOMINAL THICKNESS0.688 INCHES 1ST END
RAISED FACE NOMINAL DIAMETER2.000 INCHES 1ST END
RAISED FACE NOMINAL HEIGHT0.250 INCHES 1ST END
SECOND CONNECTION FACE TO CENTERLINE DISTANCE3.250 INCHES
VALVE OPERATION METHODAUTOMATIC OR MANUAL
VALVE SIZE1.000 INCHES
STYLE DESIGNATORANGLE FLANGED ENDS


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