The Valve,safety Relief, cataloged under National Stock Number 4820-01-306-7011, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Emerson Automation Solutions Final Control Us Lp Div Navy Product Team. Government technical data includes 13 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-306-7011 |
| Primary Part Number | 203566940SS |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Emerson Automation Solutions Final Control Us Lp Div Navy Product Team |
| Status | ACTIVE |
| Flow Control Device | DISK |
| Style Designator | ANGLE |
| Material Document and Classification | QQ-N-281 FED SPEC 1ST MATERIAL RESPONSE AND QQ-N-288 FED SPEC 2ND MATERIAL RESPONSE BODY |
| Operating Pressure | 3800.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Adjustable Pressure Range | +2201.0 TO 3800.0 POUNDS PER SQUARE INCH LBS |
| Nondefinitive Spec/std Data | .50IPS SIZE |
| Disk Loading Method | SPRING |
| Media for Which Designed | AIR SINGLE RESPONSE |
| Material | PLASTIC POLYTETRAFLUOROETHYLENE FLOW CONTROL DEVICE |
| Material | NICKEL ALLOY BODY |
| Material | NICKEL ALLOY OR COPPER ALLOY STEM |
| Opening Pressure Setting | 2201.0 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 |
|---|---|
| 203566940SS PRIMARY | Emerson Automation Solutions Final Control Us Lp Div Navy Product Team (USA) |
| D41P-30UU-06H-1/2-1/2 PRIMARY | Dante Valve Company (USA) |
| Reference | Meaning |
|---|---|
| D41P-30UU-06 | 5/9 Secondary reference Danco Valve Company |
| MIL-V-22549 | 4/1 Identification reference U.S. Government activity |
| 203566940SS | 5/9 Secondary reference Anderson Greenwood Lp Dba Anderson Greenwood Crosby |
| D41P-30UU-06H-1/2-1/2 | 5/9 Secondary reference Danco Valve Company |
| D41P-30UUU-06H-1/2-1/2 | 5/9 Secondary reference Danco Valve Company |
NSN 4820-01-306-7011 is a Valve,safety Relief, manufactured by Emerson Automation Solutions Final Control Us Lp Div Navy Product Team, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-306-7011 has 2 manufacturer part numbers on file: 203566940SS (Emerson Automation Solutions Final Control Us Lp Div Navy Product Team), D41P-30UU-06H-1/2-1/2 (Dante Valve Company).
Key specifications for 203566940SS: Flow Control Device: DISK; Style Designator: ANGLE; Material Document and Classification: QQ-N-281 FED SPEC 1ST MATERIAL RESPONSE AND QQ-N-288 FED SPEC 2ND MATERIAL RESPONSE BODY; Operating Pressure: 3800.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS. 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.