The Valve,safety Relief, cataloged under National Stock Number 4820-01-573-1188, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 4 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 4820-01-573-1188 |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Minimum Operating Temp | -29.0 FAHRENHEIT DEGF |
| Operating Pressure | 300.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Maximum Operating Temp | 300.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| 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 |
| Reference | Meaning |
|---|---|
| 9290 | 3/9 Design control — primary reference Henry Technologies, Inc. |
NSN 4820-01-573-1188 is a Valve,safety Relief, classified under FSC 4820, Valves, Nonpowered. Status: active.
Key specifications for 4820-01-573-1188: Minimum Operating Temp: -29.0 FAHRENHEIT DEGF; Operating Pressure: 300.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS; Maximum Operating Temp: 300.0 FAHRENHEIT SINGLE RESPONSE DEGF; Special Features: SIDE CONNECTION 1/8 FPT-1/4 FL; BOTTOM CONNECTION 1/4MPT; WIDTH 2.380 IN.; OVERALL HEIGHT 4.160 IN; 1/4 IN. FLARE ACCESS WITH SCHRADER CORER; FOR REFRIGERANTS AND INDUSTRIAL FLUIDS NON-CORROSIVE TO BRASS AND STEEL IN. 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.