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		                        | National Stock Number:
 4820-00-774-0543
 
 Federal Supply Class:
 4820
 
 National Item Identification Number:
 007740543
 
 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:
 
 | 256893 | 82577 | RAYTHEON COMPANY |  | 620B-11-6-2 | 09990 | PARKER-HANNIFIN CORPORATION |  | 620B11-6-2 | 86768 | TELEDYNE INDUSTRIES INC TELEDYNE FLUID SYSTEMS REPUBLIC BUSINESS UNIT | 
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 Techincal Specification:
 
 | STYLE DESIGNATOR | ANGLE |  | VALVE OPERATION METHOD | AUTOMATIC |  | MATERIAL | ALUMINUM ALLOY OVERALL |  | FLOW CONTROL DEVICE | DISK |  | CONNECTION TYPE | THREADED INTERNAL BOSS ALL ENDS |  | CONNECTION STYLE | GASKET SEAL(BOSS) ALL ENDS |  | NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED | 0.375 INCHES ALL ENDS |  | THREAD SERIES DESIGNATOR | UNF ALL ENDS |  | NOMINAL THREAD SIZE | 0.562 INCHES ALL ENDS |  | THREAD CLASS | 3B ALL ENDS |  | THREAD DIRECTION | RIGHT-HAND ALL ENDS |  | BONNET TYPE | INSIDE SPRING |  | BONNET ATTACHMENT METHOD | THREADED |  | DISK LOADING METHOD | SPRING |  | OPENING PRESSURE SETTING | 2500.0 POUNDS PER SQUARE INCH |  | FEATURES PROVIDED | VALVE STEM LOCK SHIELD AND |  |  | PRESSURE TIGHT OUTLET SIDE | 
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