The Valve,butterfly, cataloged under National Stock Number 4820-01-353-2854, 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through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-353-2854 |
| Primary Part Number | 16IN R285B-666AA-2TM |
| 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 | QQ-N-286A FED SPEC SINGLE MATERIAL RESPONSE STEM A |
| Material Document and Classification | QQ-N-288 COMP A FED SPEC SINGLE MATERIAL RESPONSE FLOW CONTROL DEVICE |
| Operating Pressure | 150.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Valve Size | 16.000 INCHES IN |
| Mounting Facility | LUG(S) |
| Material | NICKEL ALLOY STEM |
| Material | NICKEL ALLOY FLOW CONTROL DEVICE |
| Material | RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR SEAT |
| Material | NICKEL ALLOY 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 |
|---|---|
| 16IN R285B-666AA-2TM PRIMARY | Dover Resources, Inc. Div Norriseal (USA) |
| 1048437 | Dover Resources, Inc. Div Norriseal (USA) |
| Reference | Meaning |
|---|---|
| 920-223 | 3/9 Design control — primary reference U.S. Government activity |
| R285B-666AA-2PM 16IN | 5/9 Secondary reference Dover Resources, Inc. Div Norriseal |
| 920P223 | 5/9 Secondary reference U.S. Government activity |
| 920-223 | 5/9 Secondary reference Dover Resources, Inc. Div Norriseal |
| R285B-666AA-2PM 16IN | 5/9 Secondary reference U.S. Government activity |
| 920P223 | 5/9 Secondary reference Dover Resources, Inc. Div Norriseal |
NSN 4820-01-353-2854 is a Valve,butterfly, manufactured by Dover Resources, Inc. Div Norriseal, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-353-2854 has 2 manufacturer part numbers on file: 16IN R285B-666AA-2TM (Dover Resources, Inc. Div Norriseal), 1048437 (Dover Resources, Inc. Div Norriseal).
Key specifications for 16IN R285B-666AA-2TM: Style Designator: STRAIGHT THRU; Material Document and Classification: QQ-N-286A FED SPEC SINGLE MATERIAL RESPONSE STEM A; Material Document and Classification: QQ-N-288 COMP A FED SPEC SINGLE MATERIAL RESPONSE FLOW CONTROL DEVICE; Operating Pressure: 150.0 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.