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		                        | National Stock Number:
 4820-01-197-3679
 
 Federal Supply Class:
 4820
 
 National Item Identification Number:
 011973679
 
 Description:
 VALVE,RELIEF,PRESSURE AND TEMPER
 
 Detail:
 A VALVE DESIGNED TO RELEASE UNDER EXCESSIVE PRESSURE AND/OR EXCESSIVE TEMPERATURE BY OPENING AT A PREDETERMINED PRESSURE AND/OR TEMPERATURE. THERMOSTATICALLY OPERATED VALVES CLOSE WHEN THE PRESSURE IS RELIEVED OR THE TEMPERATURE IS REDUCED. FUSIBLE PLUG VALVES REQUIRE REPLACEMENT OF THE PLUG. SEE ALSO VALVE, SAFETY RELIEF AND VALVE, REGULATING. TEMPERATURE.
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 Manufacturer Information:
 
 | 261-5749471-003 | 53711 | NAVAL SEA SYSTEMS COMMAND |  | 4P149-1 | 82829 | ALLEN AIRCRAFT PRODUCTS INC | 
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