The Valve,butterfly, cataloged under National Stock Number 4820-01-217-9833, 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 11 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-217-9833 |
| Primary Part Number | 2IN D2030-645A-2KM |
| Item Name | Valve,butterfly |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Dover Resources, Inc. Div Norriseal |
| Status | ACTIVE |
| Style Designator | STRAIGHT THRU |
| Material Document and Classification | ASTM B-61 ASSN STD SINGLE MATERIAL RESPONSE BODY |
| Material Document and Classification | QQ-N-288 COMP A 0R E FED SPEC SINGLE MATERIAL RESPONSE SEAT |
| Operating Pressure | 200.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Specification/standard Data | 81349-MIL-V-22133C/REVC/AMEND2 GOVERNMENT SPECIFICATION |
| Maximum Operating Temp | 400.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Nondefinitive Spec/std Data | A CLASS AND 2 TYPE |
| Media for Which Designed | WATER, SALT SINGLE RESPONSE |
| Material | NICKEL ALLOY SEAT |
| Material | COPPER ALLOY 922 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 |
|---|---|
| 911C390 | Dover Resources, Inc. Div Norriseal (USA) |
| 2IN D2030-645A-2KM PRIMARY | Dover Resources, Inc. Div Norriseal (USA) |
| Reference | Meaning |
|---|---|
| 911C390 | 5/9 Secondary reference U.S. Government activity |
| D2030-645A-2KM | 5/9 Secondary reference U.S. Government activity |
| MIL-V-22133C | 4/1 Identification reference U.S. Government activity |
| 2IN D2030-645A-2KM | 5/9 Secondary reference U.S. Government activity |
NSN 4820-01-217-9833 is a Valve,butterfly, manufactured by Dover Resources, Inc. Div Norriseal, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-217-9833 has 2 manufacturer part numbers on file: 911C390 (Dover Resources, Inc. Div Norriseal), 2IN D2030-645A-2KM (Dover Resources, Inc. Div Norriseal).
2 possible matches (shared part number, not a government interchangeability claim): 4810-01-539-3750, 4820-01-568-9315. Verify interchangeability with system specifications before substitution.
Key specifications for 2IN D2030-645A-2KM: Style Designator: STRAIGHT THRU; Material Document and Classification: ASTM B-61 ASSN STD SINGLE MATERIAL RESPONSE BODY; Material Document and Classification: QQ-N-288 COMP A 0R E FED SPEC SINGLE MATERIAL RESPONSE SEAT; Operating Pressure: 200.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS. 11 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.