The Valve,relief,pressure and Temper, cataloged under National Stock Number 4820-01-509-9498, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is The Electric Heater Co Dba Hubbell Electric Heater Co.. 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 4820-01-509-9498 |
| Primary Part Number | HSRV-1-50 |
| Item Name | Valve,relief,pressure and Temper |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | The Electric Heater Co Dba Hubbell Electric Heater Co. |
| Status | ACTIVE |
| 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 |
|---|---|
| HSRV-1-50 PRIMARY | The Electric Heater Co Dba Hubbell Electric Heater Co. (USA) |
| Reference | Meaning |
|---|---|
| HSRV-1 | 5/1 Secondary reference The Electric Heater Co Dba Hubbell Electric Heater Co. |
| 1771093 | D/9 Drawing number reference only The Electric Heater Co Dba Hubbell Electric Heater Co. |
| 1771093 50 PSI | 5/1 Secondary reference The Electric Heater Co Dba Hubbell Electric Heater Co. |
NSN 4820-01-509-9498 is a Valve,relief,pressure and Temper, manufactured by The Electric Heater Co Dba Hubbell Electric Heater Co., classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-509-9498 has 1 manufacturer part number on file: HSRV-1-50 (The Electric Heater Co Dba Hubbell Electric Heater Co.).
Key specifications for HSRV-1-50: End Item Identification: W/S VIRGINIA CLASS SUBMARINE. 0 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.