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		                        | National Stock Number:
 4820-00-724-8470
 
 Federal Supply Class:
 4820
 
 National Item Identification Number:
 007248470
 
 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:
 
 | 112C1-4IN-275PSI | 75336 | F.C.KINGSTON CO. DBA STORM MANUFACTURING |  | 48-1-4-275 | 01343 | ANDERSON GREENWOOD LP DBA ANDERSON GREENWOOD CROSBY |  | 48-1-4IN275LB | 01343 | ANDERSON GREENWOOD LP DBA ANDERSON GREENWOOD CROSBY |  | A211557-2 | 32537 | JOY GLOBAL UNDERGROUND MINING LLC |  | A211557-2 | 83179 | JOY MFG CO AIR POWER GROUP MICHIGAN CITY PLANT | 
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 Techincal Specification:
 
 | STYLE DESIGNATOR | ANGLE |  | VALVE OPERATION METHOD | AUTOMATIC OR |  |  | MANUAL |  | MATERIAL | COPPER ALLOY OVERALL |  | FLOW CONTROL DEVICE | PISTON |  | MEDIA FOR WHICH DESIGNED | AIR SINGLE RESPONSE |  | MAXIMUM OPERATING PRESSURE | 300.0 POUNDS PER SQUARE INCH SINGLE RESPONSE |  | MAXIMUM OPERATING TEMP | 250.0 DEG FAHRENHEIT SINGLE RESPONSE |  | VALVE DISCHARGE FLOW RATE | 159.0 CUBIC FEET PER MINUTE |  | CONNECTION TYPE | THREADED EXTERNAL PIPE 1ST END |  | CONNECTION STYLE | PLAIN (PIPE) 1ST END |  | THREAD SERIES DESIGNATOR | NPT 1ST END |  | NOMINAL THREAD SIZE | 0.250 INCHES 1ST END |  | THREAD DIRECTION | RIGHT-HAND 1ST END |  | RENEWABLE SEAT RING TYPE | PRESSED-IN |  | BONNET TYPE | INSIDE SPRING |  | BONNET ATTACHMENT METHOD | PRESSURE SEAL, RING TYPE |  | DISK LOADING METHOD | SPRING |  | OPENING PRESSURE SETTING | 275.0 POUNDS PER SQUARE INCH |  | SPECIAL FEATURES | GRUMMAN,A10 AIRCRAFT | 
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