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		                             National Stock Number: 4820-01-330-9427
  Federal Supply Class: 4820
  National Item Identification Number: 013309427
  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:
 | D559B-2M-25 | 91816 | CIRCOR AEROSPACE, INC. |   
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  Techincal Specification:
 | STYLE DESIGNATOR | STRAIGHT THRU |  | VALVE OPERATION METHOD | AUTOMATIC |  | MATERIAL | COPPER ALLOY BODY |  | FLOW CONTROL DEVICE | POPPET |  | MEDIA FOR WHICH DESIGNED | AIR 1ST RESPONSE |   | ACETYLENE 2ND RESPONSE |   | AMMONIA, GASEOUS 3RD RESPONSE |   | REFRIGERANT 12 4TH RESPONSE |   | HYDROGEN 5TH RESPONSE |  | MAXIMUM OPERATING PRESSURE | 200.0 POUNDS PER SQUARE INCH SINGLE RESPONSE |  | MAXIMUM OPERATING TEMP | 250.0 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 | 0.250 INCHES ALL ENDS |  | THREAD DIRECTION | RIGHT-HAND ALL ENDS |  | BONNET TYPE | INSIDE SCREW |  | BONNET ATTACHMENT METHOD | THREADED |  | OPENING PRESSURE SETTING | 25.0 POUNDS PER SQUARE INCH |  | FURNISHED ITEMS AND QUANTITY | 1 DEFLECTOR CAP |   
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