|  | 
                            
                                |   | 
		                    
		                        | National Stock Number:
 4820-00-837-0210
 
 Federal Supply Class:
 4820
 
 National Item Identification Number:
 008370210
 
 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.
 | 
		                    
		                        | 
 Manufacturer Information:
 
 | 2R2220 | 99240 | CRISSAIR INC |  | 50-089 | 72429 | MISSION SYSTEMS DAVENPORT INC. |  | P132 | 06239 | AUSCO INC |  | 50089 | 72429 | MISSION SYSTEMS DAVENPORT INC. | 
 | 
				            
					            | 
 Techincal Specification:
 
 | MATERIAL | ALUMINUM ALLOY BODY |  |  | ALUMINUM ALLOY SEAT |  | FLOW CONTROL DEVICE | DISK |  | SEAT ANGLE | 37.0 DEGREES 1ST END |  |  | 37.0 DEGREES 2ND END |  | NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED | 0.375 INCHES 1ST END |  |  | 0.250 INCHES 2ND END |  | THREAD SERIES DESIGNATOR | UNF 1ST END |  |  | UNF 2ND END |  | NOMINAL THREAD SIZE | 0.562 INCHES 1ST END |  |  | 0.438 INCHES 2ND END |  | THREAD QUANTITY PER INCH | 18 1ST END |  |  | 20 2ND END |  | THREAD DIRECTION | RIGHT-HAND 1ST END |  |  | RIGHT-HAND 2ND END |  | DISK LOADING METHOD | SPRING |  | OPENING PRESSURE SETTING | 100.0 POUNDS PER SQUARE INCH |  | SPECIAL FEATURES | 3/8 IN. VALVE SIZE |  | THE MANUFACTURERS DATA |  |  | MANUFACTURERS CODE | 99240 |  | DESIGN CONTROL REFERENCE | 2R2220 | 
 |