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		                        | National Stock Number:
 4820-00-445-4886
 
 Federal Supply Class:
 4820
 
 National Item Identification Number:
 004454886
 
 Description:
 VALVE,CHECK
 
 Detail:
 A valve permitting flow in one direction only. It does not have a stem, except when equipped with a lever and weight and has no pressure adjustment. It may be inline or cartridge (manifold) design.
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 Manufacturer Information:
 
 | 128SC-H159-3 | 26512 | NORTHROP GRUMMAN SYSTEMS CORPORATION |  | 128SC-H159-3 | 58730 | AIRBORNE TECHNOLOGIES, INC. |  | 128SC-H159-3 | 70974 | NORTHROP GRUMMAN SYSTEMS CORPORATION |  | 128SC-H159-3 | 79RG9 | NORTHROP GRUMMAN SYSTEMS CORPORATION |  | 72177 | 81982 | HYDRO-AIRE AEROSPACE CORP |  | 3C3306 | 99240 | CRISSAIR INC | 
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 Techincal Specification:
 
 | MATERIAL | STEEL CORROSION RESISTING OVERALL |  | SURFACE TREATMENT | ENAMEL |  | STYLE DESIGNATOR | STRAIGHT THRU |  | FLOW CONTROL DEVICE | POPPET |  | MEDIA FOR WHICH DESIGNED | AIR SINGLE RESPONSE |  | MAXIMUM OPERATING PRESSURE | 3000.0 POUNDS PER SQUARE INCH SINGLE RESPONSE |  | MAXIMUM OPERATING TEMP | 275.0 DEG FAHRENHEIT SINGLE RESPONSE |  | VALVE OPERATION METHOD | AUTOMATIC |  | CONNECTION TYPE | THREADED EXTERNAL TUBE ALL ENDS |  | CONNECTION STYLE | FLARED (TUBE) ALL ENDS |  | SEAT ANGLE | 37.0 DEGREES 1ST END |  | THREAD SERIES DESIGNATOR | UNF ALL ENDS |  | NOMINAL THREAD SIZE | 0.438 INCHES ALL ENDS |  | THREAD CLASS | 3A ALL ENDS |  | THREAD DIRECTION | RIGHT-HAND ALL ENDS |  | MOUNTING POSITION | HORIZONTAL OR |  |  | VERTICAL |  | DISK LOADING METHOD | SPRING | 
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