NSN 4820-01-078-4788
Part Details | GASEOUS PRODUCTS PRESSURE EQUALIZING VALVE
4820-01-078-4788 A valve consisting of a single deadweight loaded disk, or two deadweight loaded disks each with a seperate seat. It is specifically designed for the relief of small pressure and vacuum conditions within a tank or other container to or from the atmosphere. The center of a single deadweight loaded disk may contain a spring loaded disk forming an additional seat or aperture. It may be spring loaded and/or equipped with a manual unloader on either the pressure or vacuum side. Exclude VALVE, VACUUM BREAKING.
Alternate Parts: 1853332, 4820-01-078-4788, 01-078-4788, 4820010784788, 010784788
| Supply Group (FSG) | NSN Assigned | NIIN | Item Name Code (INC) |
|---|---|---|---|
| 48 | JUN 14, 1979 | 01-078-4788 | 10958 ( VALVE, PRESSURE EQUALIZING, GASEOUS PRODUCTS ) |
REFERENCE DRAWINGS & PICTURES
STRAIGHT THRU
SOCKET
FLARED
SOCKET
FLARED
SOCKET
FLARED
SOCKET
FLARED
Cross Reference | NSN 4820-01-078-4788
| Part Number | Cage Code | Manufacturer |
|---|---|---|
| 1853332 | 03956 | NORTHROP GRUMMAN SYSTEMS CORPORATIONDIV NAVIGATION AND MARITIME SYSTEMS |
Technical Data | NSN 4820-01-078-4788
| Characteristic | Specifications |
|---|---|
| BODY STYLE | STRAIGHT THRU |
| BODY MATERIAL | STEEL |
| FLOW CONTROL DEVICE | S ANY ACCEPTABLE |
| END CONNECTION QUANTITY | 2 |
| FIRST END CONNECTION TYPE | THREADED EXTERNAL TUBE |
| FIRST END STYLE DESIGNATOR | FLARED |
| FIRST END OUTSIDE DIAMETER TUBE ACCOMMODATED | 0.500 INCHES NOMINAL |
| FIRST END THREAD PITCH DIAMETERS | +0.5976 TO +0.5978 INCHES |
| FIRST END THREAD DIRECTION | RIGHT-HAND |
| FIRST END THREAD SERIES DESIGNATOR | UNEF |
| FIRST END NOMINAL THREAD SIZE | 0.625 INCHES |
| FIRST END THREAD TOLERANCE CLASS | 3A EXTERNAL |
| SECOND END RELATIONSHIP WITH FIRST END | NOT IDENTICAL |
| SECOND END CONNECTION TYPE | UNTHREADED INTERNAL HOSE |
| SECOND END STYLE DESIGNATOR | 0 SOCKET |
| SECOND END INSIDE DIAMETER HOSE ACCOMMODATED | 0.250 INCHES NOMINAL |
| SECOND END OUTSIDE DIAMETER HOSE ACCOMMODATED | 0.250 INCHES MINIMUM AND 0.437 INCHES MAXIMUM |
| MAXIMUM OPERATING PRESSURE | 45.0 POUNDS PER SQUARE INCH |
| MEDIA FOR WHICH DESIGNED | E AIR |
| VALVE VENTING DESIGN TYPE | ATMOSPHERIC |
| VALVE RELIEF DESIGN TYPE | PRESSURE AND VACUUM |
| END ITEM IDENTIFICATION | USED ON MASTER GYRO COMPASS MK 27 MOD 1 SYSTEM ONBOARD VARIOUS COAST GUARD VESSELS |