NSN 4820-00-287-3139
Part Details | SAFETY RELIEF VALVE
4820-00-287-3139 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.
Alternate Parts: 1990T12X13650PSI, 1990T-1/2X1-36-50PSI, 1990, 1990T121 3550PSI, 1990T-1/21 35-50PSI, 4820-00-287-3139, 00-287-3139, 4820002873139, 002873139
Supply Group (FSG) | NSN Assigned | NIIN | Item Name Code (INC) |
---|---|---|---|
48 | JAN 01, 1963 | 00-287-3139 | 05488 ( VALVE, SAFETY RELIEF ) |
REFERENCE DRAWINGS & PICTURES
ANGLE

Cross Reference | NSN 4820-00-287-3139
Part Number | Cage Code | Manufacturer |
---|---|---|
1990T-1/2X1-36-50PSI | 16497 | DRESSER, INC.DBA DRESSER EQUIPMENT GROUP |
1990 | 16497 | DRESSER, INC.DBA DRESSER EQUIPMENT GROUP |
1990T-1/21 35-50PSI | 16497 | DRESSER, INC.DBA DRESSER EQUIPMENT GROUP |
Technical Data | NSN 4820-00-287-3139
Characteristic | Specifications |
---|---|
STYLE DESIGNATOR | ANGLE |
FLOW CONTROL DEVICE | DISK |
VALVE DISCHARGE FLOW RATE | 93.0 POUNDS PER HOUR |
VALVE OPERATION METHOD | AUTOMATIC |
DISK LOADING METHOD | SPRING |
OPENING PRESSURE SETTING | 50.0 POUNDS PER SQUARE INCH |
ADJUSTABLE PRESSURE RANGE | 33.0 TO 55.0 POUNDS PER SQUARE INCH |
MINIMUM OPERATING TEMP | 401.0 DEG FAHRENHEIT |
SPECIAL FEATURES | W/LIFTING LEVER AND INCONEL SPRING |
NONDEFINITIVE SPEC/STD DATA | A-1 TYPE AND C CLASS |