The Valve,safety Relief, cataloged under National Stock Number 4820-01-289-1522, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Hydro Systems Co Clarek Industries Div. 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-289-1522 |
| Primary Part Number | AC145 |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Hydro Systems Co Clarek Industries Div |
| Status | ACTIVE |
| Maximum Operating Temp | 145.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Media for Which Designed | WATER, FRESH SINGLE RESPONSE |
| Media for Which Designed | WATER, FRESH SINGLE RESPONSEUNABLE TO DECODE |
| 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 |
|---|---|
| AC145 PRIMARY | Hydro Systems Co Clarek Industries Div (USA) |
NSN 4820-01-289-1522 is a Valve,safety Relief, manufactured by Hydro Systems Co Clarek Industries Div, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-289-1522 has 1 manufacturer part number on file: AC145 (Hydro Systems Co Clarek Industries Div).
Key specifications for AC145: Maximum Operating Temp: 145.0 FAHRENHEIT SINGLE RESPONSE DEGF; Media for Which Designed: WATER, FRESH SINGLE RESPONSE; Media for Which Designed: WATER, FRESH SINGLE RESPONSEUNABLE TO DECODE. 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.