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		                        | National Stock Number:
 4820-00-911-7166
 
 Federal Supply Class:
 4820
 
 National Item Identification Number:
 009117166
 
 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:
 
 | 638X2-6 | 86768 | TELEDYNE INDUSTRIES INC TELEDYNE FLUID SYSTEMS REPUBLIC BUSINESS UNIT | 
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 Techincal Specification:
 
 | STYLE DESIGNATOR | ANGLE |  | VALVE OPERATION METHOD | AUTOMATIC |  | MATERIAL | COPPER ALLOY BODY |  |  | STEEL CORROSION RESISTING FLOW CONTROL DEVICE |  | FLOW CONTROL DEVICE | POPPET |  | CONNECTION TYPE | THREADED EXTERNAL TUBE 1ST END |  |  | THREADED EXTERNAL PIPE 2ND END |  | CONNECTION STYLE | FLARED (TUBE) 1ST END |  |  | PLAIN (PIPE) 2ND END |  | SEAT ANGLE | 37.0 DEGREES 1ST END |  | NOMINAL PIPE SIZE ACCOMMODATED | 0.250 INCHES 2ND END |  | NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED | 0.375 INCHES 1ST END |  | THREAD SERIES DESIGNATOR | UNF 1ST END |  |  | NPT 2ND END |  | NOMINAL THREAD SIZE | 0.562 INCHES 1ST END |  |  | 0.250 INCHES 2ND END |  | THREAD QUANTITY PER INCH | 18 1ST END |  |  | 18 2ND END |  | THREAD CLASS | 3A 1ST END |  | THREAD DIRECTION | RIGHT-HAND 1ST END |  |  | RIGHT-HAND 2ND END |  | BONNET TYPE | INSIDE SPRING |  | BONNET ATTACHMENT METHOD | THREADED |  | DISK LOADING METHOD | SPRING |  | ADJUSTABLE PRESSURE RANGE | 10.0 TO 50.0 POUNDS PER SQUARE INCH |  | FEATURES PROVIDED | BONNET PACKING |  | THE MANUFACTURERS DATA |  |  | MANUFACTURERS CODE | 86768 |  | DESIGN CONTROL REFERENCE | 638X2-6 | 
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