4820-01-321-1789 VALVE,CHECK Index 4820-01-321-1791 VALVE,SAFETY RELIEF

National Stock Number:
4820-01-321-1790

Federal Supply Class:
4820

National Item Identification Number:
013211790

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:
NMP121-3/4IN-L275954KUNKLE INDUSTRIES INC LONERGAN VALVE DIV
NMP121-3/4IN-L2122C-200 PSI01343ANDERSON GREENWOOD LP DBA ANDERSON GREENWOOD CROSBY
NMP121-3/4IN-L2122C-200 PSI15187EMERSON AUTOMATION SOLUTIONS FINAL CONTROL US LP
NMP121-3/4IN-L2122C-200 PSI75954KUNKLE INDUSTRIES INC LONERGAN VALVE DIV


Techincal Specification:
BOLT CIRCLE NOMINAL DIAMETER3.188 INCHES FIRST END
BOLT HOLE NOMINAL DIAMETER0.562 INCHES FIRST END
BOLT HOLE QUANTITY4 FIRST END
BONNET TYPEINSIDE SCREW
BONNET ATTACHMENT METHODTHREADED
CONNECTION STYLESOCKET SECOND END
CONNECTION TYPEFLANGE FIRST END
CONNECTION TYPEUNTHREADED INTERNAL PIPE SECOND END
FLANGE FACE DESIGNPLAIN FIRST END
FLANGE SHAPEROUND WITH HOLES FIRST END
FLOW CONTROL DEVICEDISK
MATERIALBRONZE FLOW CONTROL DEVICE
MATERIALBRONZE BODY
MATERIALCOPPER ALLOY STEM
MATERIALNICKEL ALLOY SEAT
MAXIMUM OPERATING TEMP150.0 FAHRENHEIT FIRST RESPONSE
MAXIMUM OPERATING TEMP425.0 FAHRENHEIT SECOND RESPONSE
MEDIA FOR WHICH DESIGNEDAIR FIRST RESPONSE
MEDIA FOR WHICH DESIGNEDSTEAM SECOND RESPONSE
MEDIA FOR WHICH DESIGNEDWATER, FRESH THIRD RESPONSE
NOMINAL OUTSIDE DIAMETER4.312 INCHES FIRST END
NOMINAL THICKNESS0.688 INCHES FIRST END
NOMINAL PIPE SIZE ACCOMMODATED0.750 INCHES SECOND END
OPENING PRESSURE SETTING200.0 POUNDS PER SQUARE INCH
OPERATING PRESSURE200.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SECOND RESPONSE
OPERATING PRESSURE400.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM FIRST RESPONSE
VALVE OPERATION METHODAUTOMATIC
STYLE DESIGNATORANGLE


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