NSN 4820-01-121-8057 1511H, 1511-H, 3VP953H
Product Details | SAFETY RELIEF VALVE
4820-01-121-8057 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: 1511H, 1511-H, 3VP953H, 3VP953-H, 4820-01-121-8057, 01-121-8057, 4820011218057, 011218057
| Supply Group (FSG) | NSN Assign. | NIIN | Item Name Code (INC) |
|---|---|---|---|
| 48 | 10 NOV 1981 | 01-121-8057 | 05488 ( VALVE, SAFETY RELIEF ) |
Drawings & Photos | NSN 4820-01-121-8057
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Technical Data | NSN 4820-01-121-8057
| Characteristic | Specifications |
|---|---|
| MATERIAL | IRON CAST BODY COPPER ALLOY FLOW CONTROL DEVICE COPPER ALLOY SEAT COPPER ALLOY STEM |
| STYLE DESIGNATOR | C1A ANGLE FLANGED ENDS |
| FIRST CONNECTION FACE TO CENTERLINE DISTANCE | 4.000 INCHES |
| SECOND CONNECTION FACE TO CENTERLINE DISTANCE | 4.250 INCHES |
| VALVE SIZE | 2.500 INCHES |
| FLOW CONTROL DEVICE | DISK |
| MAXIMUM OPERATING PRESSURE | 30.0 POUNDS PER SQUARE INCH SINGLE RESPONSE |
| MAXIMUM OPERATING TEMP | 450.0 DEG FAHRENHEIT SINGLE RESPONSE |
| VALVE OPERATION METHOD | AUTOMATIC |
| CONNECTION TYPE | THREADED INTERNAL PIPE 1ST END FLANGE 2ND END |
| CONNECTION STYLE | G9 PLAIN 1ST END |
| FLANGE SHAPE | ROUND WITH HOLES 2ND END |
| NOMINAL OUTSIDE DIAMETER | 6.125 INCHES 2ND END |
| NOMINAL THICKNESS | 0.812 INCHES 2ND END |
| BOLT HOLE QUANTITY | 4 2ND END |
| BOLT HOLE NOMINAL DIAMETER | 0.750 INCHES 2ND END |
| BOLT CIRCLE NOMINAL DIAMETER | 4.500 INCHES 2ND END |
| FLANGE FACE DESIGN | RAISED STRAIGHT 2ND END |
| RAISED FACE NOMINAL HEIGHT | 0.062 INCHES 2ND END |
| RAISED FACE NOMINAL DIAMETER | 3.562 INCHES 2ND END |
| THREAD SERIES DESIGNATOR | NPT 1ST END |
| NOMINAL THREAD SIZE | 2.500 INCHES 1ST END |
| THREAD DIRECTION | RIGHT-HAND 1ST END |
| BONNET TYPE | INSIDE SPRING |
| BONNET ATTACHMENT METHOD | BOLTED |
| DISK LOADING METHOD | SPRING |
| III END ITEM IDENTIFICATION | HEATING SYSTEM ONBOARD 270 FT WMEC CG VESSELS |
| MANUFACTURERS CODE | 16497 |
| DESIGN CONTROL REFERENCE | 1511-H |
Restrictions/Controls & Freight Information | NSN 4820-01-121-8057
| 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 |
| Demilitarization Code: | B | Munitions List Item - Mutilation (MUT) to the point of scrap required. (Formerly: Demilitarization not required. Trade Security Controls (TSCs) required at disposition.) |
| Precious Metals Indicator Code: | A | Item does not contain precious metal |
| Criticality Code: | X | The item does not have a nuclear hardened feature or any other critical feature such as tolerance, fit restriction or application. |
| Category | Code | Description |
|---|---|---|
| No Freight Information | ||