The Valve,safety Relief, cataloged under National Stock Number 4820-01-645-3440, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Kellogg, Brown & Root Ltd. Government technical data includes 4 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 4820-01-645-3440 |
| Primary Part Number | 1002728547 |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Kellogg, Brown & Root Ltd |
| Status | ACTIVE |
| Minimum Operating Temp | -320.0 FAHRENHEIT DEGF |
| Maximum Operating Temp | 165.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Media for Which Designed | GAS, NATURAL SINGLE RESPONSE |
| Material | COPPER ALLOY BODY |
| 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 |
|---|---|
| 1002728547 | Kellogg, Brown & Root Ltd (GBR) |
| Reference | Meaning |
|---|---|
| PRV9432TP150 | 3/9 Design control — primary reference Rego Products |
NSN 4820-01-645-3440 is a Valve,safety Relief, manufactured by Kellogg, Brown & Root Ltd, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-645-3440 has 1 manufacturer part number on file: 1002728547 (Kellogg, Brown & Root Ltd).
Key specifications for 1002728547: Minimum Operating Temp: -320.0 FAHRENHEIT DEGF; Maximum Operating Temp: 165.0 FAHRENHEIT SINGLE RESPONSE DEGF; Media for Which Designed: GAS, NATURAL SINGLE RESPONSE; Part Name Assigned by Controlling Agency: RELIEF VALVE. 4 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.