The Valve,butterfly, cataloged under National Stock Number 4820-01-421-3481, 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. 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 | 4820-01-421-3481 |
| Primary Part Number | 941-703-180-139-251 |
| Item Name | Valve,butterfly |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Emerson Automation Solutions Final Control Us Lp |
| Status | ACTIVE |
| Style Designator | STRAIGHT THRU |
| Valve Size | 18.000 INCHES IN |
| Mounting Facility | WAFER |
| Media for Which Designed | WATER, SALT SINGLE RESPONSE |
| Material | NICKEL ALLOY STEM |
| Material | NICKEL ALLOY FLOW CONTROL DEVICE |
| Material | RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR SEAT |
| Material | COPPER ALLOY 958 BODY |
| Valve Operation Method | 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 |
|---|---|
| 941-703-180-139-251 PRIMARY | Emerson Automation Solutions Final Control Us Lp (USA) |
| D139-18-941 | Emerson Automation Solutions Final Control Us Lp (USA) |
NSN 4820-01-421-3481 is a Valve,butterfly, manufactured by Emerson Automation Solutions Final Control Us Lp, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-421-3481 has 2 manufacturer part numbers on file: 941-703-180-139-251 (Emerson Automation Solutions Final Control Us Lp), D139-18-941 (Emerson Automation Solutions Final Control Us Lp).
Key specifications for 941-703-180-139-251: Style Designator: STRAIGHT THRU; Valve Size: 18.000 INCHES IN; Mounting Facility: WAFER; Media for Which Designed: WATER, SALT SINGLE RESPONSE. 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.