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		                        | National Stock Number:
 4820-00-491-3047
 
 Federal Supply Class:
 4820
 
 National Item Identification Number:
 004913047
 
 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:
 
 | 240 | 39305 | ITT MCDONNELL-MILLER A UNIT OF ITT FLUID HANDLING DIV |  | 240-1-1-21N30 | 39305 | ITT MCDONNELL-MILLER A UNIT OF ITT FLUID HANDLING DIV |  | 3301-30 | 06631 | ITT BELL AND GOSSET-HYDRONICS A UNIT OF ITT FLUID HANDLING DIV |  | 3301 | 1N911 | REALTECH OF FLORIDA  DBA VIERK INDUSTRIAL PRODUCTS |  | 260-1-1/2IN | 39305 | ITT MCDONNELL-MILLER A UNIT OF ITT FLUID HANDLING DIV | 
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 Techincal Specification:
 
 | STYLE DESIGNATOR | ANGLE |  | VALVE OPERATION METHOD | AUTOMATIC |  | MATERIAL | COPPER ALLOY BODY |  |  | STEEL FLOW CONTROL DEVICE |  | FLOW CONTROL DEVICE | DISK |  | MAXIMUM OPERATING PRESSURE | 125.0 POUNDS PER SQUARE INCH SINGLE RESPONSE |  | MAXIMUM OPERATING TEMP | 250.0 DEG FAHRENHEIT SINGLE RESPONSE |  | CONNECTION TYPE | THREADED EXTERNAL PIPE 1ST END |  |  | THREADED EXTERNAL PIPE 2ND END |  | CONNECTION STYLE | PLAIN (PIPE) ALL ENDS |  | THREAD SERIES DESIGNATOR | NPT 1ST END |  |  | NPT 2ND END |  | NOMINAL THREAD SIZE | 2.000 INCHES 1ST END |  |  | 1.500 INCHES 2ND END |  | THREAD DIRECTION | RIGHT-HAND 1ST END |  |  | RIGHT-HAND 2ND END |  | DISK LOADING METHOD | SPRING |  | OPENING PRESSURE SETTING | 30.0 POUNDS PER SQUARE INCH | 
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