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NSN 4820-01-495-3788, 4820014953788
VALVE,SAFETY RELIEF

Federal Supply Classification
FSC 4820 - Valves, Nonpowered
National Item Identification Number
NIIN 014953788
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 4820-01-495-3788

National Stock Number (NSN) 4820-01-495-3788, or NIIN 014953788, (valve,safety relief) was assigned March 14, 2002 in the Federal Logistics Information System (FLIS). This NIIN is Available for Manual Assignment. This NSN does not replace any other NSNs.

There are 3 manufacturer part numbers 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, one supplier is listed as an Active supplier for this NSN. Of the active suppliers, only one supplier is deemed design controlled or valid supply parts.

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

This NSN is unique to one weapons system.

There has been very little demand for this national stock number. The demand for this NSN originated from less than 5 countries. Based on a planned procurement review by the Primary Inventory Control Activity (PICA) on Jan 02, 2005, this NSN's acquisition method was noted as: Acquire directly from the actual manufacturer, whether or not the prime contractor is the actual manufacturer. The Government physically does not have in its possession sufficient, accurate, or legible data to purchase this part from other than current source(s). (NOTE: This code is applicable only to parts under immediate buy requirements and only as long as the deficiency is under review for resolution and appropriate recoding.) Valid AMCs: 1, 2, 3, 4 and 5.

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 4820014953788 does not contain precious metals.

This NSN is associated to Schedule B 8481400000: safety or relief valves. The Schedule B End Use is listed as industrial machines, other. NAICS classification category 332911: industrial valve manufacturing.

This information was last updated on .


Technical Characteristics

DISK LOADING METHOD
(ADSU) SPRING
ADJUSTABLE PRESSURE RANGE
(CQCY) +156.0 TO 183.0 POUNDS PER SQUARE INCH
BOLT HOLE NOMINAL DIAMETER
(CWCQ) 0.625 INCHES 2ND END
BOLT HOLE NOMINAL DIAMETER
(CWCQ) 0.750 INCHES 1ST END
BOLT HOLE QUANTITY
(AECS) 4 1ST END
BOLT HOLE QUANTITY
(AECS) 4 2ND END
BONNET ATTACHMENT METHOD
(ADST) BOLTED
BOLT CIRCLE NOMINAL DIAMETER
(CWCT) 3.875 INCHES 2ND END
BOLT CIRCLE NOMINAL DIAMETER
(CWCT) 5.500 INCHES 1ST END
CONNECTION TYPE
(AWLS) FLANGE 1ST END
CONNECTION TYPE
(AWLS) FLANGE 2ND END
FIRST CONNECTION FACE TO CENTERLINE DISTANCE
(CWCL) 3.875 INCHES
FLANGE FACE DESIGN
(CWDF) PLAIN 1ST END
FLANGE FACE DESIGN
(CWDF) PLAIN 2ND END
FLANGE SHAPE
(ARKN) ROUND WITH HOLES 1ST END
FLANGE SHAPE
(ARKN) ROUND WITH HOLES 2ND END
FLOW CONTROL DEVICE
(ADQU) DISK
NOMINAL PIPE SIZE ACCOMMODATED
(AAAR) 1.500 INCHES 1ST END
NOMINAL PIPE SIZE ACCOMMODATED
(AAAR) 1.500 INCHES 2ND END
NOMINAL THICKNESS
(CWCK) 0.562 INCHES 2ND END
NOMINAL THICKNESS
(CWCK) 0.625 INCHES 1ST END
MATERIAL DOCUMENT AND CLASSIFICATION
(MDCL) ASTM-A-216-GRADEWCB ASSN STD SINGLE MATERIAL RESPONSE BODY
MATERIAL DOCUMENT AND CLASSIFICATION
(MDCL) ASTM-A-276-GR-304 ASSN STD SINGLE MATERIAL RESPONSE FLOW CONTROL DEVICE
MATERIAL DOCUMENT AND CLASSIFICATION
(MDCL) ASTM-A-582 ASSN STD SINGLE MATERIAL RESPONSE STEM
MATERIAL
(MATT) STEEL BODY
MATERIAL
(MATT) STEEL CORROSION RESISTING FLOW CONTROL DEVICE
MATERIAL
(MATT) STEEL CORROSION RESISTING STEM
MOUNTING FACILITY
(AZGM) BRACKET
NOMINAL OUTSIDE DIAMETER
(CWCD) 5.000 INCHES 2ND END
NOMINAL OUTSIDE DIAMETER
(CWCD) 7.000 INCHES 1ST END
SECOND CONNECTION FACE TO CENTERLINE DISTANCE
(CWCR) 3.875 INCHES
PART NAME ASSIGNED BY CONTROLLING AGENCY
(CXCY) STEEL RELIEF VALVE 1 1/2 X 2 1/2 G ORIFACE
SPECIAL FEATURES
(FEAT) FLANGE FACES PLAIN W/RAISED FACES, APPROX 1/16IN
VALVE OPERATION METHOD
(AQLR) AUTOMATIC
VALVE SIZE
(CCFG) 2.500 INCHES
STYLE DESIGNATOR
(STYL) ANGLE FLANGED ENDS
ADJUSTABLE PRESSURE RANGE
(CQCY) +156.0/+183.0 POUNDS PER SQUARE INCH
STYLE DESIGNATOR
(STYL) ERR-090


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