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		                        | National Stock Number:
 4820-00-833-7839
 
 Federal Supply Class:
 4820
 
 National Item Identification Number:
 008337839
 
 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:
 
 | 684-2-1-8D1 | 86768 | TELEDYNE INDUSTRIES INC TELEDYNE FLUID SYSTEMS REPUBLIC BUSINESS UNIT |  | 684-2-1/8D1 | 09990 | PARKER-HANNIFIN CORPORATION |  | 788C424 | 48306 | NORTHROP GRUMMAN SUPPORT SERVICES CORP |  | 788C424H07 | 48306 | NORTHROP GRUMMAN SUPPORT SERVICES CORP |  | 788C424H07 | 97942 | NORTHROP GRUMMAN SYSTEMS CORPORATION |  | 788C424 | 97942 | NORTHROP GRUMMAN SYSTEMS CORPORATION | 
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 Techincal Specification:
 
 | STYLE DESIGNATOR | STRAIGHT THRU |  | VALVE OPERATION METHOD | AUTOMATIC |  | MATERIAL | ALUMINUM ALLOY BODY |  |  | STEEL COMP 303 FLOW CONTROL DEVICE |  |  | RUBBER SYNTHETIC SEAT |  | FLOW CONTROL DEVICE | POPPET |  | MEDIA FOR WHICH DESIGNED | AIR 1ST RESPONSE |  |  | GAS, INERT 2ND RESPONSE |  | MAXIMUM OPERATING PRESSURE | 50.0 POUNDS PER SQUARE INCH SINGLE RESPONSE |  | MAXIMUM OPERATING TEMP | 225.0 DEG FAHRENHEIT SINGLE RESPONSE |  | CONNECTION TYPE | THREADED EXTERNAL PIPE ALL ENDS |  | CONNECTION STYLE | PLAIN (PIPE) ALL ENDS |  | THREAD SERIES DESIGNATOR | NPT ALL ENDS |  | NOMINAL THREAD SIZE | 0.125 INCHES ALL ENDS |  | THREAD DIRECTION | RIGHT-HAND ALL ENDS |  | DISK LOADING METHOD | SPRING |  | OPENING PRESSURE SETTING | 20.0 POUNDS PER SQUARE INCH | 
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