NSN 4820-00-068-8991
Part Details | SAFETY RELIEF VALVE
4820-00-068-8991 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: MC1665, 20980, 128SCH1071, 128SCH107-1, 4820-00-068-8991, 00-068-8991, 4820000688991, 000688991
Supply Group (FSG) | NSN Assigned | NIIN | Item Name Code (INC) |
---|---|---|---|
48 | JAN 01, 1963 | 00-068-8991 | 05488 ( VALVE, SAFETY RELIEF ) |
REFERENCE DRAWINGS & PICTURES
STRAIGHT THRU

Cross Reference | NSN 4820-00-068-8991
Part Number | Cage Code | Manufacturer |
---|---|---|
MC1665 | 76050 | EATON AEROSPACE LLCM C AEROSPACE DIV |
20980 | 99643 | EATON CORPORATIONDBA EATON AEROSPACE |
128SCH107-1 | 26512 | NORTHROP GRUMMAN SYSTEMS CORPORATIONDIV MISSION SYSTEMS |
Technical Data | NSN 4820-00-068-8991
Characteristic | Specifications |
---|---|
SURFACE TREATMENT | ANODIZE |
STYLE DESIGNATOR | STRAIGHT THRU |
FLOW CONTROL DEVICE | POPPET |
VALVE DISCHARGE FLOW RATE | 4.0 CUBIC FEET PER MINUTE |
VALVE OPERATION METHOD | AUTOMATIC |
BONNET TYPE | PACKING RETAINING |
DISK LOADING METHOD | SPRING |
ADJUSTABLE PRESSURE RANGE | 49.0 TO 51.0 POUNDS PER SQUARE INCH |
FEATURES PROVIDED | PRESSURE TIGHT OUTLET SIDE |