The Valve,safety Relief, cataloged under National Stock Number 4820-01-689-3161, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Anderson Greenwood Lp Dba Anderson Greenwood Crosby. Government technical data includes 13 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-689-3161 |
| Primary Part Number | 0020-G01-MG0050 |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Anderson Greenwood Lp Dba Anderson Greenwood Crosby |
| Status | ACTIVE |
| Style Designator | ANGLE FLANGED ENDS |
| Operating Pressure | 300.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Valve Size | 1.500 INCHES IN |
| Bonnet Type | INSIDE SPRING |
| Maximum Operating Temp | 406.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Bonnet Attachment Method | BOLTED |
| Media for Which Designed | LIQUID SINGLE RESPONSE |
| Material | BRONZE BODY |
| Material | COPPER ALLOY STEM |
| Material | BRONZE BONNET |
| Material | RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR O-RING |
| Thread Series Designator | NPT ALL ENDS |
| 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 |
|---|---|
| 0020-G01-MG0050 PRIMARY | Anderson Greenwood Lp Dba Anderson Greenwood Crosby (USA) |
| 0020-G01-MG0050 | Emerson Process Management Power & Water Solutions, Inc. (USA) |
| 31000-408 | Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier (USA) |
NSN 4820-01-689-3161 is a Valve,safety Relief, manufactured by Anderson Greenwood Lp Dba Anderson Greenwood Crosby, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-689-3161 has 3 manufacturer part numbers on file: 0020-G01-MG0050 (Anderson Greenwood Lp Dba Anderson Greenwood Crosby), 0020-G01-MG0050 (Emerson Process Management Power & Water Solutions, Inc.), 31000-408 (Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier).
Key specifications for 0020-G01-MG0050: Style Designator: ANGLE FLANGED ENDS; Operating Pressure: 300.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS; Valve Size: 1.500 INCHES IN; Bonnet Type: INSIDE SPRING. 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.