The Valve,safety Relief, cataloged under National Stock Number 4820-01-236-2655, 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.. Government technical data includes 4 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-236-2655 |
| Primary Part Number | HSRV-2-110 |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | The Electric Heater Co Dba Hubbell Electric Heater Co. |
| Status | ACTIVE |
| Style Designator | ANGLE |
| Material | COPPER ALLOY BODY |
| Opening Pressure Setting | 100.0 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 |
|---|---|
| HSRV-2-110 PRIMARY | The Electric Heater Co Dba Hubbell Electric Heater Co. (USA) |
| Reference | Meaning |
|---|---|
| 17721 PIECE 7 MOD | 5/9 Secondary reference The Electric Heater Co Dba Hubbell Electric Heater Co. |
| 17721 | D/9 Drawing number reference only The Electric Heater Co Dba Hubbell Electric Heater Co. |
| 17721-7-110 | 5/9 Secondary reference The Electric Heater Co Dba Hubbell Electric Heater Co. |
| 17721-7-M | 5/9 Secondary reference U.S. Government activity |
NSN 4820-01-236-2655 is a Valve,safety Relief, manufactured by The Electric Heater Co Dba Hubbell Electric Heater Co., classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-236-2655 has 1 manufacturer part number on file: HSRV-2-110 (The Electric Heater Co Dba Hubbell Electric Heater Co.).
3 possible matches (shared part number, not a government interchangeability claim): 4410-01-474-0649, 4410-01-515-8840, 5307-01-726-8464. Verify interchangeability with system specifications before substitution.
Key specifications for HSRV-2-110: Style Designator: ANGLE; Material: COPPER ALLOY BODY; Opening Pressure Setting: 100.0 POUNDS PER SQUARE INCH LBS; Valve Operation Method: AUTOMATIC. 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.