The Valve,safety Relief, cataloged under National Stock Number 4820-01-652-2301, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Aalberts Integrated Piping Systems Americas, Inc.. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 — Valves, Nonpowered (FSG 48) |
| Manufacturers | Electro-Steam Generator Corp. (CAGE 5MXD4); Aalberts Integrated Piping Systems Americas, Inc. (CAGE 72219) |
| Parameter | Value |
|---|---|
| NSN | 4820-01-652-2301 |
| Primary Part Number | 29-303A-55S |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Aalberts Integrated Piping Systems Americas, Inc. |
| 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 |
|---|---|
| 0022300 | Electro-Steam Generator Corp. (USA) |
| 29-303A-55S PRIMARY | Aalberts Integrated Piping Systems Americas, Inc. (USA) |
| Reference | Meaning |
|---|---|
| NG-DS150-03 REV A DWG# 17 | C/1 Advisory reference — outside the item-of-supply concept Electro-Steam Generator Corp. |
NSN 4820-01-652-2301 is a Valve,safety Relief, manufactured by Aalberts Integrated Piping Systems Americas, Inc., classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-652-2301 has 2 manufacturer part numbers on file: 0022300 (Electro-Steam Generator Corp.), 29-303A-55S (Aalberts Integrated Piping Systems Americas, Inc.).
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.