The Valve,safety Relief, cataloged under National Stock Number 4820-00-147-2806, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 13 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-147-2806 |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Flow Control Device | DISK |
| Flange Shape | ROUND FIRST END |
| Flange Face Design | RAISED STRAIGHT FIRST END |
| Style Designator | ANGLE FLANGED ENDS |
| Valve Size | 1.500 INCHES IN |
| Bonnet Type | EXPOSED SPRING |
| Second Connection Face to Centerline Distance | 7.000 INCHES IN |
| Disk Loading Method | SPRING |
| Mounting Facility | BRACKET(S) |
| Bonnet Attachment Method | BOLTED |
| First Connection Face to Centerline Distance | 5.750 INCHES IN |
| Valve Operation Method | AUTOMATIC OR MANUAL |
| Raised Face Nominal Height | 0.625 INCHES SECOND END IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 1 1-2 1556HCX2M | 3/9 Design control — primary reference Dresser, Inc. Dba Dresser Equipment Group Div Industrial Valve Operations, Dresse |
| 1556 | 5/9 Secondary reference Dresser, Inc. Dba Dresser Equipment Group Div Industrial Valve Operations, Dresse |
NSN 4820-00-147-2806 is a Valve,safety Relief, classified under FSC 4820, Valves, Nonpowered. Status: active.
Key specifications for 4820-00-147-2806: Flow Control Device: DISK; Flange Shape: ROUND FIRST END; Flange Face Design: RAISED STRAIGHT FIRST END; Style Designator: ANGLE FLANGED ENDS. 13 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.