The Valve,safety Relief, cataloged under National Stock Number 4820-01-470-5289, 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 19 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-470-5289 |
| Primary Part Number | 20225 |
| 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 |
| Furnished Items and Quantity | 1 CAP AND 1 LEVER AND 1 SPRING |
| Connection Type | FLANGE ALL ENDS |
| Style Designator | ANGLE FLANGED ENDS |
| Material Document and Classification | ASTM A479, TY 304 ASSN STD SINGLE MATERIAL RESPONSE FLOW CONTROL DEVICE |
| Material Document and Classification | ASTM A582, TY 416 ASSN STD 1ST MATERIAL RESPONSE AND ASTM A479, TY 304 ASSN STD 2ND MATERIAL RESPONSE STEM |
| Material Document and Classification | ASTMA216, GR WCB ASSN STD SINGLE MATERIAL RESPONSE BODY |
| Operating Pressure | 150.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Valve Size | 6.000 INCHES IN |
| Adjustable Pressure Range | +71.0 TO 91.0 POUNDS PER SQUARE INCH LBS |
| Bonnet Type | INSIDE SPRING |
| Maximum Operating Temp | 180.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Second Connection Face to Centerline Distance | 7.000 INCHES IN |
| Bonnet Attachment Method | BOLTED |
| First Connection Face to Centerline Distance | 7.250 INCHES IN |
| Material | STEEL COMP 304 FLOW CONTROL DEVICE |
| Material | STEEL UNS J03002 BODY |
| Material | STEEL COMP 416 AND STEEL COMP 304 STEM |
| Valve Operation Method | AUTOMATIC OR MANUAL |
| 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 |
|---|---|
| 20225 PRIMARY | Emerson Automation Solutions Final Control Us Lp Div Navy Product Team (USA) |
| Reference | Meaning |
|---|---|
| 5215MA140310 71T91PSI | 5/9 Secondary reference Anderson Greenwood Lp Dba Anderson Greenwood Crosby |
| 5215MA140310 71T91PSI AND 20225 | 5/9 Secondary reference Emerson Automation Solutions Final Control Us Lp Div Navy Product Team |
| 5215MA140310 71 | C/1 Advisory reference — outside the item-of-supply concept Anderson Greenwood Lp Dba Anderson Greenwood Crosby |
| 20225 | D/9 Drawing number reference only Anderson Greenwood Lp Dba Anderson Greenwood Crosby |
| 20225 71T91PSI | 5/9 Secondary reference Anderson Greenwood Lp Dba Anderson Greenwood Crosby |
NSN 4820-01-470-5289 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 4820-01-470-5289 has 1 manufacturer part number on file: 20225 (Emerson Automation Solutions Final Control Us Lp Div Navy Product Team).
Key specifications for 20225: Flow Control Device: DISK; Furnished Items and Quantity: 1 CAP AND 1 LEVER AND 1 SPRING; Connection Type: FLANGE ALL ENDS; Style Designator: ANGLE FLANGED ENDS. 19 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.