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NSN 4820-00-482-5681, 4820004825681
VALVE,SAFETY RELIEF

Federal Supply Classification
FSC 4820 - Valves, Nonpowered
National Item Identification Number
NIIN 004825681
Codification Country
United States
Item Name Code
INC 05488
Criticality
(X) This item does not have a nuclear hardened feature or any other critical feature such as tolerance, fit restriction or application.
Hazardous Material Indicator Code
(N) There is no data in the HMIRS and the NSN is in an FSC not generally suspected of containing hazardous materials.
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DLMS® Summary

National Stock Number 4820-00-482-5681

National Stock Number (NSN) 4820-00-482-5681, or NIIN 004825681, (valve,safety relief) was assigned February 1, 1971 in the Federal Logistics Information System (FLIS). This NSN does not replace any other NSNs.

There is only one manufacturer part number associated with this NSN. None of the associated part number(s) are considered obsolete. The manufacturer part numbers were originally supplied by one supplier. Today, there are no suppliers listed as an Active supplier for this NSN. Of the active suppliers, there are no suppliers that are deemed design controlled or valid supply parts.

This part number has not been procured by the US Government in over 5 years.

Based on a planned procurement review by the Primary Inventory Control Activity (PICA) on Apr 02, 1991, this NSN's acquisition method was noted as: Not established. Not established.

This NSN is assigned to Item Name Code (INC) 05488. [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.]. This item does not have a nuclear hardened feature or any other critical feature such as tolerance, fit restriction or application. There is no data in the HMIRS and the NSN is in an FSC not generally suspected of containing hazardous materials. NSN 4820004825681 contains an unknown precious metal.

This information was last updated on .


Technical Characteristics

NOMINAL PIPE SIZE ACCOMMODATED
(AAAR) 4.000 INCHES 2ND END
CONNECTION STYLE
(AHNC) PLAIN,OPTIONAL END(PIPE) 2ND END
FEATURES PROVIDED
(CBBL) VALVE STEM LOCK SHIELD AND BONNET PACKING AND PRESSURE TIGHT OUTLET SIDE
MEDIA FOR WHICH DESIGNED
(MEDA) AIR 1ST RESPONSE
THREAD SERIES DESIGNATOR
(THSD) NPT 2ND END
FLANGE FACE DESIGN
(CWDF) RAISED STRAIGHT 1ST END
RAISED FACE NOMINAL HEIGHT
(CWDH) 0.063 INCHES 1ST END
RAISED FACE NOMINAL DIAMETER
(CWDL) 5.687 INCHES 1ST END
MATERIAL
(MATT) COPPER ALLOY SEAT
MATERIAL
(MATT) IRON CAST BODY
BONNET ATTACHMENT METHOD
(ADST) BOLTED
BOLT HOLE QUANTITY
(AECS) 8 1ST END
CONNECTION TYPE
(AWLS) FLANGE 1ST END
NOMINAL THREAD SIZE
(CQJX) 4.000 INCHES 2ND END
MATERIAL
(MATT) COPPER ALLOY FLOW CONTROL DEVICE
FLANGE SHAPE
(ARKN) ROUND WITH HOLES 1ST END
BOLT HOLE NOMINAL DIAMETER
(CWCQ) 0.750 INCHES 1ST END
RENEWABLE SEAT RING TYPE
(ADZH) THREADED
STYLE DESIGNATOR
(STYL) ANGLE
STYLE DESIGNATOR
(STYL) ERR-090
CONNECTION TYPE
(AWLS) THREADED INTERNAL PIPE 2ND END
MAXIMUM OPERATING PRESSURE
(CQGM) 250.0 POUNDS PER SQUARE INCH 1ST RESPONSE
MAXIMUM OPERATING PRESSURE
(CQGM) 250.0 POUNDS PER SQUARE INCH 2ND RESPONSE
MATERIAL
(MATT) STEEL STEM
FLOW CONTROL DEVICE
(ADQU) DISK
NOMINAL THICKNESS
(CWCK) 1.250 INCHES 1ST END
MEDIA FOR WHICH DESIGNED
(MEDA) STEAM 2ND RESPONSE
THREAD DIRECTION
(AAJF) RIGHT-HAND 2ND END
BONNET TYPE
(ADSR) INSIDE SPRING
DISK LOADING METHOD
(ADSU) SPRING
NOMINAL OUTSIDE DIAMETER
(CWCD) 8.250 INCHES 1ST END
VALVE DISCHARGE FLOW RATE
(ADSY) 14235.0 CUBIC FEET PER MINUTE
CONNECTION STYLE
(AHNC) G9 PLAIN,OPTIONAL END(PIPE) 2ND END
MAXIMUM OPERATING TEMP
(AEHZ) 406.0 DEG FAHRENHEIT 2ND RESPONSE
MAXIMUM OPERATING TEMP
(AEHZ) 406.0 DEG FAHRENHEIT 1ST RESPONSE
VALVE OPERATION METHOD
(AQLR) AUTOMATIC
BOLT CIRCLE NOMINAL DIAMETER
(CWCT) 6.625 INCHES 1ST END
THREAD QUANTITY PER INCH
(CMLP) 8 2ND END

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