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		                        | National Stock Number:
 4820-00-474-1759
 
 Federal Supply Class:
 4820
 
 National Item Identification Number:
 004741759
 
 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.
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 Manufacturer Information:
 
 | 8182-11 | 81982 | HYDRO-AIRE AEROSPACE CORP | 
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 Techincal Specification:
 
 | BONNET TYPE | PACKING RETAINING |  | CONNECTION TYPE | THREADED EXTERNAL PIPE 2ND END |  | CONNECTION TYPE | THREADED EXTERNAL TUBE 1ST END |  | CONNECTION STYLE | FLARED (TUBE) 1ST END |  | CONNECTION STYLE | PLAIN (PIPE) 2ND END |  | DISK LOADING METHOD | SPRING |  | FEATURES PROVIDED | PRESSURE TIGHT OUTLET SIDE |  | FLOW CONTROL DEVICE | POPPET |  | MATERIAL | STEEL CORROSION RESISTING BODY |  | MATERIAL | STEEL CORROSION RESISTING FLOW CONTROL DEVICE |  | MATERIAL | STEEL CORROSION RESISTING SEAT |  | MAXIMUM OPERATING TEMP | 160.0 FAHRENHEIT SINGLE RESPONSE |  | NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED | 0.250 INCHES 1ST END |  | NOMINAL PIPE SIZE ACCOMMODATED | 0.125 INCHES 2ND END |  | NOMINAL THREAD SIZE | 0.437 INCHES 1ST END |  | NOMINAL THREAD SIZE | 0.125 INCHES 2ND END |  | OPENING PRESSURE SETTING | 25.0 POUNDS PER SQUARE INCH |  | SEAT ANGLE | 37.0 DEGREES 1ST END |  | STYLE DESIGNATOR | STRAIGHT THRU |  | THREAD DIRECTION | RIGHT-HAND 1ST END |  | THREAD DIRECTION | RIGHT-HAND 2ND END |  | THREAD CLASS | 3A 1ST END |  | THREAD SERIES DESIGNATOR | ANPT 2ND END |  | THREAD SERIES DESIGNATOR | UNF 1ST END |  | THREAD QUANTITY PER INCH | 20 1ST END |  | THREAD QUANTITY PER INCH | 27 2ND END |  | VALVE OPERATION METHOD | AUTOMATIC | 
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