The Valve,safety Relief, cataloged under National Stock Number 4820-01-659-9066, 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 Dba Marine Product Team Div Marine Product Team. Government technical data includes 28 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-659-9066 |
| Primary Part Number | 0020-G01-MG0066 |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Emerson Automation Solutions Final Control Us Lp Dba Marine Product Team Div Marine Product Team |
| Status | ACTIVE |
| Flow Control Device | DISK |
| Furnished Items and Quantity | 1 CAP |
| Nominal Pipe Size Accommodated | 1.50 INCHES ALL ENDS IN |
| Connection Style | PLAIN,OPTIONAL END(PIPE) SECOND END |
| Connection Style | PLAIN (PIPE) FIRST END |
| Minimum Operating Temp | -60.00 FAHRENHEIT DEGF |
| Connection Type | UNTHREADED INTERNAL PIPE SECOND END |
| Connection Type | THREADED EXTERNAL PIPE FIRST END |
| Style Designator | ANGLE |
| Material Document and Classification | ASTM B62 ASSN STD SINGLE MATERIAL RESPONSE BODY |
| Material Document and Classification | ASTM B16 ASSN STD SINGLE MATERIAL RESPONSE STEM |
| Material Document and Classification | ASTM B584 ASSN STD SINGLE MATERIAL RESPONSE DISK |
| Operating Pressure | 500.00 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Valve Size | 1.50 INCHES IN |
| Bonnet Type | INSIDE SPRING |
| Thread Direction | RIGHT-HAND ALL ENDS |
| Nominal Thread Size | 1.50 INCHES ALL ENDS IN |
| Maximum Operating Temp | 406.00 FAHRENHEIT SINGLE RESPONSE DEGF |
| Second Connection Face to Centerline Distance | 2.125 INCHES IN |
| Disk Loading Method | SPRING |
| Bonnet Attachment Method | BOLTED |
| First Connection Face to Centerline Distance | 2.6875 INCHES IN |
| Material | BRONZE BODY |
| Material | COPPER ALLOY STEM |
| Material | BRONZE DISK |
| Thread Series Designator | NPT ALL ENDS |
| Opening Pressure Setting | 66.00 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 |
|---|---|
| 0020-G01-MG0066 PRIMARY | Emerson Automation Solutions Final Control Us Lp Dba Marine Product Team Div Marine Product Team (USA) |
| Reference | Meaning |
|---|---|
| 0020-G01-MG0066 | 3/9 Design control — primary reference Kunkle Industries Inc |
NSN 4820-01-659-9066 is a Valve,safety Relief, manufactured by Emerson Automation Solutions Final Control Us Lp Dba Marine Product Team Div Marine Product Team, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-659-9066 has 1 manufacturer part number on file: 0020-G01-MG0066 (Emerson Automation Solutions Final Control Us Lp Dba Marine Product Team Div Marine Product Team).
Key specifications for 0020-G01-MG0066: Flow Control Device: DISK; Furnished Items and Quantity: 1 CAP; Nominal Pipe Size Accommodated: 1.50 INCHES ALL ENDS IN; Connection Style: PLAIN,OPTIONAL END(PIPE) SECOND END. 28 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.