The Valve,safety Relief, cataloged under National Stock Number 4820-01-649-0602, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Safran Aerosystems. Government technical data includes 14 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-649-0602 |
| Primary Part Number | 780RPA3PSI |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Safran Aerosystems |
| Status | ACTIVE |
| Minimum Operating Temp | -40.0 FAHRENHEIT DEGF |
| Style Designator | STRAIGHT THRU |
| Bonnet Type | INSIDE SPRING |
| Nominal Thread Size | 0.875 INCHES FIRST END IN |
| Maximum Operating Temp | 180.00 FAHRENHEIT SINGLE RESPONSE DEGF |
| Surface Treatment | ANODIZE PLATE |
| Bonnet Attachment Method | PRESSURE SEAL, RING TYPE |
| Face to Face Distance | 0.75 INCHES IN |
| Thread Quantity Per Inch | 32 FIRST END |
| Material | ALUMINUM STEM |
| Material | ALUMINUM BODY |
| Material | RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR FLOW CONTROL DEVICE |
| Opening Pressure Setting | 3.00 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 |
|---|---|
| 780RPA3PSI | Safran Aerosystems (FRA) |
| Reference | Meaning |
|---|---|
| 780RPA30 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4820-01-649-0602 is a Valve,safety Relief, manufactured by Safran Aerosystems, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-649-0602 has 1 manufacturer part number on file: 780RPA3PSI (Safran Aerosystems).
Key specifications for 780RPA3PSI: Minimum Operating Temp: -40.0 FAHRENHEIT DEGF; Style Designator: STRAIGHT THRU; Bonnet Type: INSIDE SPRING; Nominal Thread Size: 0.875 INCHES FIRST END IN. 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.