The Valve,safety Relief, cataloged under National Stock Number 4820-01-470-7729, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 16 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-470-7729 |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Flow Control Device | POPPET |
| Surface Treatment Document and Classification | MIL-A-8625,TY1 MIL SPEC SINGLE TREATMENT RESPONSE LOCATION NOT OTHERWISE SPECIFIED |
| Connection Style | REDUCED SOCKET (TUBE) FIRST END |
| Nominal Length | 34.40 MILLIMETERS ALL ENDS MM |
| Connection Type | UNTHREADED CARTRIDGE ALL ENDS |
| Style Designator | STRAIGHT THRU |
| Material Document and Classification | QQ-A-225/6 FED SPEC SINGLE MATERIAL RESPONSE BODY |
| Operating Pressure | 4.0 BAR MAXIMUM SINGLE RESPONSE |
| Maximum Operating Temp | 135.0 CELSIUS SINGLE RESPONSE DEGC |
| Nominal Outside Diameter | 23.47 MILLIMETERS ALL ENDS MM |
| Surface Treatment | ANODIZE LOCATION NOT OTHERWISE SPECIFIED |
| Media for Which Designed | HYDRAULIC FLUID, PETROLEUM BASE SINGLE RESPONSE |
| Material | ALUMINUM ALLOY 2024 BODY |
| Opening Pressure Setting | 7.5 BAR |
| Valve Discharge Flow Rate | 26.0 LITERS PER MINUTE |
| 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 |
|---|---|
| 2R3706 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4820-01-470-7729 is a Valve,safety Relief, classified under FSC 4820, Valves, Nonpowered. Status: active.
Key specifications for 4820-01-470-7729: Flow Control Device: POPPET; Surface Treatment Document and Classification: MIL-A-8625,TY1 MIL SPEC SINGLE TREATMENT RESPONSE LOCATION NOT OTHERWISE SPECIFIED; Connection Style: REDUCED SOCKET (TUBE) FIRST END; Nominal Length: 34.40 MILLIMETERS ALL ENDS MM. 16 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.