The Valve,safety Relief, cataloged under National Stock Number 4820-01-071-3823, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Us Army Aviation and Missile Command. Government technical data includes 11 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-071-3823 |
| Primary Part Number | 13238648 |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Us Army Aviation and Missile Command |
| Status | ACTIVE |
| Flow Control Device | DIAPHRAGM |
| Style Designator | SAFETY RELIEF |
| Operating Pressure | 5.3 POUNDS PER SQUARE INCH (PSI) MAXIMUM SECOND RESPONSE LBS |
| Operating Pressure | 6.2 POUNDS PER SQUARE INCH (PSI) MAXIMUM FIRST RESPONSE LBS |
| Adjustable Pressure Range | +0.5 TO 1.5 POUNDS PER SQUARE INCH LBS |
| Maximum Operating Temp | 20.0 CELSIUS FIRST RESPONSE DEGC |
| Maximum Operating Temp | 70.0 CELSIUS SECOND RESPONSE DEGC |
| Disk Loading Method | SPRING |
| Media for Which Designed | NITROGEN, GASEOUS SINGLE RESPONSE |
| Opening Pressure Setting | 0.5 POUNDS PER SQUARE INCH 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 |
| Part Number | Manufacturer |
|---|---|
| 13238648 | Lockheed Martin Corp Electronics and Missiles Div (USA) |
| 13238648 PRIMARY | Us Army Aviation and Missile Command (USA) |
| 13238648 | Sonfarrel Inc. (USA) |
| Reference | Meaning |
|---|---|
| 13006519 | 5/9 Secondary reference Lockheed Martin Corp Electronics and Missiles Div |
| 13006519 | 5/9 Secondary reference Us Army Aviation and Missile Command |
NSN 4820-01-071-3823 is a Valve,safety Relief, manufactured by Us Army Aviation and Missile Command, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-071-3823 has 3 manufacturer part numbers on file: 13238648 (Lockheed Martin Corp Electronics and Missiles Div), 13238648 (Us Army Aviation and Missile Command), 13238648 (Sonfarrel Inc.).
Key specifications for 13238648: Flow Control Device: DIAPHRAGM; Style Designator: SAFETY RELIEF; Operating Pressure: 5.3 POUNDS PER SQUARE INCH (PSI) MAXIMUM SECOND RESPONSE LBS; Operating Pressure: 6.2 POUNDS PER SQUARE INCH (PSI) MAXIMUM FIRST RESPONSE LBS. 11 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.