4820-01-171-4391 VALVE,CHECK Index 4820-01-171-4393 VALVE,SAFETY RELIEF

National Stock Number:
4820-01-171-4392

Federal Supply Class:
4820

National Item Identification Number:
011714392

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:
20210H51M01343ANDERSON GREENWOOD LP DBA ANDERSON GREENWOOD CROSBY
20210H51M15187EMERSON AUTOMATION SOLUTIONS FINAL CONTROL US LP
20210H51MCP03950NAVAL INVENTORY CONTROL POINT MECHANICSBURG
20210H51MCP15187EMERSON AUTOMATION SOLUTIONS FINAL CONTROL US LP


Techincal Specification:
ADJUSTABLE PRESSURE RANGE+45.0 TO 55.0 POUNDS PER SQUARE INCH
BONNET ATTACHMENT METHODBOLTED
BONNET TYPEINSIDE SPRING
CONNECTION TYPEUNTHREADED INTERNAL PIPE 1ST END
CONNECTION STYLEGASKET SEAL (PIPE) 1ST END
CRITICALITY CODE JUSTIFICATIONZZZY
DISK LOADING METHODSPRING
FLOW CONTROL DEVICEDISK
MATERIALCOPPER ALLOY 922 BODY
MATERIALNICKEL ALLOY 400 OR NICKEL ALLOY R-405 FLOW CONTROL DEVICE
MATERIALNICKEL ALLOY 400 OR NICKEL ALLOY R-405 SEAT
MATERIALNICKEL ALLOY 400 OR NICKEL ALLOY R-405 STEM
NOMINAL PIPE SIZE ACCOMMODATED0.500 INCHES 1ST END
REFERENCE NUMBER DIFFERENTIATING CHARACTERISTICSCLEANING, PACKAGING, AND MARKING IAW MIL-STD-1330D
STYLE DESIGNATORANGLE
VALVE OPERATION METHODAUTOMATIC


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