The Valve,safety Relief, cataloged under National Stock Number 4820-01-229-5508, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Deacon Industrial Supply Co Inc. Government technical data includes 10 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-229-5508 |
| Primary Part Number | DB12M/NMP-1539 |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Deacon Industrial Supply Co Inc |
| Status | ACTIVE |
| Flow Control Device | DISK |
| Flange Shape | ROUND WITH HOLES ALL ENDS |
| Flange Face Design | RAISED STRAIGHT ALL ENDS |
| Connection Type | FLANGE ALL ENDS |
| Style Designator | ANGLE FLANGED ENDS |
| Valve Size | 4.000 INCHES IN |
| Second Connection Face to Centerline Distance | 7.000 INCHES IN |
| First Connection Face to Centerline Distance | 7.250 INCHES IN |
| Material | STEEL BODY |
| 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 |
|---|---|
| DB12M/NMP-1539 PRIMARY | Deacon Industrial Supply Co Inc (USA) |
| Reference | Meaning |
|---|---|
| DB12M/NMP-1539 | 3/9 Design control — primary reference Deacon Industrial Supply Co., Inc. Dba Deacon Automation |
| DB12M/NMP1539 | 5/9 Secondary reference Anderson Greenwood Lp Dba Anderson Greenwood Crosby |
| DB12M/NMP1539 | 5/9 Secondary reference Emerson Automation Solutions Final Control Us Lp Div Navy Product Team |
| DB12M/NMP1539 | 5/9 Secondary reference Kunkle Industries Inc Lonergan Valve Div |
NSN 4820-01-229-5508 is a Valve,safety Relief, manufactured by Deacon Industrial Supply Co Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-229-5508 has 1 manufacturer part number on file: DB12M/NMP-1539 (Deacon Industrial Supply Co Inc).
Key specifications for DB12M/NMP-1539: Flow Control Device: DISK; Flange Shape: ROUND WITH HOLES ALL ENDS; Flange Face Design: RAISED STRAIGHT ALL ENDS; Connection Type: FLANGE ALL ENDS. 10 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.