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		                        | National Stock Number:
 4820-00-828-2730
 
 Federal Supply Class:
 4820
 
 National Item Identification Number:
 008282730
 
 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:
 
 | D559A-1M-4 | 91816 | CIRCOR AEROSPACE, INC. | 
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 Techincal Specification:
 
 | CONNECTION TYPE | THREADED EXTERNAL PIPE 1ST END |  | CONNECTION STYLE | PLAIN (PIPE) 1ST END |  | DISK LOADING METHOD | SPRING |  | FURNISHED ITEMS AND QUANTITY | 1 DEFLECTOR CAP |  | FLOW CONTROL DEVICE | POPPET |  | MATERIAL | ALUMINUM ALLOY  AND RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR FLOW CONTROL DEVICE |  | MATERIAL | ALUMINUM ALLOY BODY |  | MATERIAL | ALUMINUM ALLOY SEAT |  | MAXIMUM OPERATING TEMP | 250.0 FAHRENHEIT SINGLE RESPONSE |  | MAXIMUM OPERATING PRESSURE | 200.0 POUNDS PER SQUARE INCH SINGLE RESPONSE |  | MEDIA FOR WHICH DESIGNED | AIR 1ST RESPONSEACETYLENE 2ND RESPONSEAMMONIA, GASEOUS 3RD RESPONSEREFRIGERANT 12 4TH RESPONSEHYDROGEN 5TH RESPONSE |  | NOMINAL PIPE SIZE ACCOMMODATED | 0.125 INCHES 1ST END |  | NOMINAL THREAD SIZE | 0.125 INCHES 1ST END |  | OPENING PRESSURE SETTING | 64.0 POUNDS PER SQUARE INCH |  | STYLE DESIGNATOR | STRAIGHT THRU W/BAFFLE |  | SURFACE TREATMENT | ANODIZE |  | THREAD DIRECTION | RIGHT-HAND 1ST END |  | THREAD SERIES DESIGNATOR | NPT 1ST END |  | VALVE OPERATION METHOD | AUTOMATIC | 
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