The Valve,regulating,fluid Pressure, cataloged under National Stock Number 4820-01-516-3990, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Siemens Industry, Inc. Dba Siemens Energy Div Process Industries and Drives. Government technical data includes 9 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-516-3990 |
| Primary Part Number | 661A3 |
| Item Name | Valve,regulating,fluid Pressure |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Siemens Industry, Inc. Dba Siemens Energy Div Process Industries and Drives |
| Status | ACTIVE |
| Flow Control Device | DIAPHRAGM |
| Regulation Type | AUTOMATIC DOUBLE STAGE |
| Temp Rating | -40.0 FAHRENHEIT MINIMUM AND 180.0 FAHRENHEIT MAXIMUM DEGF |
| End Connection Quantity | 4 |
| Valve Loading Method | SPRING |
| Mounting Facility | BRACKET |
| Material | RUBBER SYNTHETIC FLOW CONTROL DEVICE |
| Media for Which Designed | AIR |
| Maximum Inlet Pressure Rating | ERR-060 |
| 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 |
|---|---|
| 661A3 PRIMARY | Siemens Industry, Inc. Dba Siemens Energy Div Process Industries and Drives (USA) |
| 245-7613088-ITEM-15 | Naval Sea Systems Command (USA) |
NSN 4820-01-516-3990 is a Valve,regulating,fluid Pressure, manufactured by Siemens Industry, Inc. Dba Siemens Energy Div Process Industries and Drives, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-516-3990 has 2 manufacturer part numbers on file: 661A3 (Siemens Industry, Inc. Dba Siemens Energy Div Process Industries and Drives), 245-7613088-ITEM-15 (Naval Sea Systems Command).
Key specifications for 661A3: Flow Control Device: DIAPHRAGM; Regulation Type: AUTOMATIC DOUBLE STAGE; Temp Rating: -40.0 FAHRENHEIT MINIMUM AND 180.0 FAHRENHEIT MAXIMUM DEGF; End Connection Quantity: 4. 9 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.