The Valve,butterfly, cataloged under National Stock Number 4820-01-355-7622, 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 8 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-355-7622 |
| Primary Part Number | 920E222 3IN |
| Item Name | Valve,butterfly |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Dover Resources, Inc. Div Norriseal |
| Status | ACTIVE |
| Style Designator | STRAIGHT THRU |
| Valve Size | 3.000 INCHES IN |
| Mounting Facility | WAFER |
| Material | NICKEL ALLOY FLOW CONTROL DEVICE |
| Material | RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR SEAT |
| Material | NICKEL ALLOY K-500 STEM |
| 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 |
|---|---|
| 920E222 3IN | Dover Resources, Inc. Div Norriseal (USA) |
| 3IN R285C-666AA-1AM | Dover Resources, Inc. Div Norriseal (USA) |
| Reference | Meaning |
|---|---|
| 3" R285C-666AA- | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| 3IN R285C-666AA-1AM | 3/9 Design control — primary reference U.S. Government activity |
| 920E222 3IN | 5/9 Secondary reference U.S. Government activity |
NSN 4820-01-355-7622 is a Valve,butterfly, manufactured by Dover Resources, Inc. Div Norriseal, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-355-7622 has 2 manufacturer part numbers on file: 920E222 3IN (Dover Resources, Inc. Div Norriseal), 3IN R285C-666AA-1AM (Dover Resources, Inc. Div Norriseal).
Key specifications for 920E222 3IN: Style Designator: STRAIGHT THRU; Valve Size: 3.000 INCHES IN; Mounting Facility: WAFER; Material: NICKEL ALLOY FLOW CONTROL DEVICE. 8 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.