NSN 4820-00-401-3974 004013974
Product Details | SAFETY RELIEF VALVE
4820-00-401-3974 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.
Part Alternates: 004013974
| Supply Group (FSG) | NSN Assign. | NIIN | Item Name Code (INC) |
|---|---|---|---|
| 48 | 00-401-3974 | 05488 ( VALVE, SAFETY RELIEF ) |
Drawings & Photos | NSN 4810-00-401-3974
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Technical Data | NSN 4820-00-401-3974
| Characteristic | Specifications |
|---|---|
| MATERIAL | STEEL BODY STEEL CORROSION RESISTING FLOW CONTROL DEVICE STEEL CORROSION RESISTING SEAT STEEL CORROSION RESISTING STEM |
| STYLE DESIGNATOR | C1 ANGLE |
| FLOW CONTROL DEVICE | DISK |
| VALVE DISCHARGE FLOW RATE | 58300.0 POUNDS PER HOUR |
| VALVE OPERATION METHOD | AUTOMATIC |
| CONNECTION TYPE | FLANGE 1ST END FLANGE 2ND END |
| FLANGE SHAPE | ROUND WITH HOLES 1ST END ROUND WITH HOLES 2ND END |
| NOMINAL OUTSIDE DIAMETER | 7.500 INCHES 1ST END 8.688 INCHES 2ND END |
| NOMINAL THICKNESS | 1.438 INCHES 1ST END 0.875 INCHES 2ND END |
| BOLT HOLE QUANTITY | 8 1ST END 9 2ND END |
| BOLT HOLE NOMINAL DIAMETER | 0.812 INCHES 1ST END 0.812 INCHES 2ND END |
| BOLT CIRCLE NOMINAL DIAMETER | 5.875 INCHES 1ST END 7.125 INCHES 2ND END |
| FLANGE FACE DESIGN | RAISED STRAIGHT 1ST END PLAIN 2ND END |
| RAISED FACE NOMINAL HEIGHT | 0.250 INCHES 1ST END |
| RAISED FACE NOMINAL DIAMETER | 5.000 INCHES 1ST END |
| RENEWABLE SEAT RING TYPE | THREADED |
| BONNET TYPE | PACKING RETAINING |
| FEATURES PROVIDED | PRESSURE TIGHT OUTLET SIDE |
| REFERENCE NUMBER DIFFERENTIATING CHARACTERISTICS | AS DIFFERENTIATED BY THE VALVE DISCHARGE FLOW RATE REQUIREMENTAND THE RAISED FACE DIAMETER REQUIREMENT |
| MANUFACTURERS CODE | 38056 |
| DESIGN CONTROL REFERENCE | R6180X |
Restrictions/Controls & Freight Information | NSN 4820-00-401-3974
| Category | Code | Description |
|---|---|---|
| Hazardous Material Indicator Code | N | There is no data in the HMIS and the NSN is in an FSC not generally suspected of containing hazardous materials |
| Controlled Inventory Item Code: | U | UNCLASSIFIED |
| Category | Code | Description |
|---|---|---|
| No Freight Information | ||