The Valve,safety Relief, cataloged under National Stock Number 4820-01-378-3313, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Matheson Gas Products Inc. Government technical data includes 3 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 4820-01-378-3313 |
| Primary Part Number | 9100640 |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Matheson Gas Products Inc |
| Status | ACTIVE |
| Adjustable Pressure Range | +800.0 TO 1200.0 POUNDS PER SQUARE INCH LBS |
| Disk Loading Method | SPRING |
| 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 |
|---|---|
| 9100640 | Matheson Gas Products Inc (USA) |
| Reference | Meaning |
|---|---|
| 9100640 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4820-01-378-3313 is a Valve,safety Relief, manufactured by Matheson Gas Products Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-378-3313 has 1 manufacturer part number on file: 9100640 (Matheson Gas Products Inc).
Key specifications for 9100640: Adjustable Pressure Range: +800.0 TO 1200.0 POUNDS PER SQUARE INCH LBS; Disk Loading Method: SPRING; End Item Identification: MATHESON GAS PRODUCTS CO REGULATOR MODEL NO. 8; Valve Operation Method: AUTOMATIC. 3 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.