The Valve,safety Relief, cataloged under National Stock Number 4820-01-322-5709, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Tri-State Technical Sales Corp. Government technical data includes 7 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-322-5709 |
| Primary Part Number | 26FC15-940 |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Tri-State Technical Sales Corp |
| Status | ACTIVE |
| Connection Type | FLANGE ALL ENDS |
| Style Designator | ANGLE FLANGED ENDS |
| Valve Size | 1.500 INCHES IN |
| Bonnet Attachment Method | THREADED |
| Material | STEEL BODY |
| Opening Pressure Setting | 440.0 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 |
|---|---|
| 26FC15-940 PRIMARY | Tri-State Technical Sales Corp (USA) |
| Reference | Meaning |
|---|---|
| 26FC15-940 | 5/9 Secondary reference Montgomery Tool and Die Casting |
| 26FC15-940 | C/1 Advisory reference — outside the item-of-supply concept Curtiss-Wright Flow Control Corporation Dba Farris Engineering Div Curtiss-Wright Valves Division- Farris |
| 26FC15-940,SER NO.77913-A8 | 5/9 Secondary reference Curtiss-Wright Flow Control Corporation Dba Farris Engineering Div Curtiss-Wright Valves Division- Farris |
NSN 4820-01-322-5709 is a Valve,safety Relief, manufactured by Tri-State Technical Sales Corp, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-322-5709 has 1 manufacturer part number on file: 26FC15-940 (Tri-State Technical Sales Corp).
Key specifications for 26FC15-940: Connection Type: FLANGE ALL ENDS; Style Designator: ANGLE FLANGED ENDS; Valve Size: 1.500 INCHES IN; Special Features: BLOW-DOWN RING. 7 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.