The Valve,safety Relief, cataloged under National Stock Number 4820-00-287-3136, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 14 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-287-3136 |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Flow Control Device | DISK |
| Nominal Pipe Size Accommodated | 1.000 INCHES FIRST END IN |
| Connection Style | SOCKET FIRST END |
| Connection Type | UNTHREADED INTERNAL PIPE FIRST END |
| Style Designator | ANGLE |
| Adjustable Pressure Range | +158.0 TO 207.0 POUNDS PER SQUARE INCH LBS |
| Maximum Operating Temp | 425.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Nondefinitive Spec/std Data | A-1 TYPE AND C CLASS |
| Disk Loading Method | SPRING |
| Material | COPPER ALLOY BODY |
| Material | NICKEL ALLOY SEAT |
| Material | COPPER ALLOY STEM |
| Valve Discharge Flow Rate | 1580.0 POUNDS PER HOUR LBS |
| Valve Operation Method | AUTOMATIC |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| MILV20065 | 4/1 Identification reference U.S. Government activity |
| 5VA072 | 3/9 Design control — primary reference Dresser, Inc. Dba Dresser Equipment Group Div Industrial Valve Operations, Dresse |
| TYA1CLC400-158T0207SBU | 5/1 Secondary reference Naval Inventory Control Point Mechanicsburg |
NSN 4820-00-287-3136 is a Valve,safety Relief, classified under FSC 4820, Valves, Nonpowered. Status: active.
Key specifications for 4820-00-287-3136: Flow Control Device: DISK; Nominal Pipe Size Accommodated: 1.000 INCHES FIRST END IN; Connection Style: SOCKET FIRST END; Connection Type: UNTHREADED INTERNAL PIPE FIRST END. 14 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.