The Valve,butterfly, cataloged under National Stock Number 4820-00-732-1869, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Dover Resources, Inc. Div Norriseal. Government technical data includes 14 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-732-1869 |
| Primary Part Number | R2040-42AA-2KM 911-444 10IN |
| Item Name | Valve,butterfly |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Dover Resources, Inc. Div Norriseal |
| Status | ACTIVE |
| Minimum Operating Temp | -30.0 FAHRENHEIT DEGF |
| Style Designator | STRAIGHT THRU |
| Material Document and Classification | ASTM B26, SG 70A 356 T6 ASSN STD SINGLE MATERIAL RESPONSE BODY A |
| Material Document and Classification | AISI 316 ASSN STD SINGLE MATERIAL RESPONSE STEM |
| Material Document and Classification | ASTM B148, ALLOY 9C ASSN STD SINGLE MATERIAL RESPONSE FLOW CONTROL DEVICE |
| Operating Pressure | 200.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Valve Size | 10.000 INCHES IN |
| Maximum Operating Temp | 250.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Mounting Facility | WAFER |
| Media for Which Designed | AIR SINGLE RESPONSE |
| Material | ALUMINUM ALLOY FLOW CONTROL DEVICE |
| Material | ALUMINUM BODY |
| Material | STEEL CORROSION RESISTING STEM |
| 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 |
|---|---|
| R2040-42AA-2KM 911-444 10IN | Dover Resources, Inc. Div Norriseal (USA) |
| Reference | Meaning |
|---|---|
| R2040-42AA-2KM 911-444 10IN | 5/9 Secondary reference U.S. Government activity |
| 805-1749102R10 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4820-00-732-1869 is a Valve,butterfly, manufactured by Dover Resources, Inc. Div Norriseal, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-732-1869 has 1 manufacturer part number on file: R2040-42AA-2KM 911-444 10IN (Dover Resources, Inc. Div Norriseal).
Key specifications for R2040-42AA-2KM 911-444 10IN: Minimum Operating Temp: -30.0 FAHRENHEIT DEGF; Style Designator: STRAIGHT THRU; Material Document and Classification: ASTM B26, SG 70A 356 T6 ASSN STD SINGLE MATERIAL RESPONSE BODY A; Material Document and Classification: AISI 316 ASSN STD SINGLE MATERIAL RESPONSE STEM. 14 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.