The Valve,gate, cataloged under National Stock Number 4820-01-221-8841, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Potomac Engineering Corp. Government technical data includes 9 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-221-8841 |
| Primary Part Number | 8271-9044-05B |
| Item Name | Valve,gate |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Potomac Engineering Corp |
| Status | ACTIVE |
| Nominal Pipe Size Accommodated | 0.500 INCHES IN |
| Maximum Operating Temp and Media for Which Designed | 500.0 FAHRENHEIT WATER-OIL-GAS DEGF |
| Stem Type | NONRISING |
| Connection Type | SOCKET, WELD, PIPE |
| Valve Size | 0.500 INCHES IN |
| Bonnet Type | OUTSIDE SCREW-YOKE |
| Bonnet Attachment Method | BOLTED |
| Material | STEEL COMP 316L 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 |
|---|---|
| 8271-9044-05B PRIMARY | Potomac Engineering Corp (USA) |
| Reference | Meaning |
|---|---|
| 8271-9044-05B | 3/9 Design control — primary reference Newdell Company, the Dba Ladish Valves |
NSN 4820-01-221-8841 is a Valve,gate, manufactured by Potomac Engineering Corp, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-221-8841 has 1 manufacturer part number on file: 8271-9044-05B (Potomac Engineering Corp).
Key specifications for 8271-9044-05B: Nominal Pipe Size Accommodated: 0.500 INCHES IN; Maximum Operating Temp and Media for Which Designed: 500.0 FAHRENHEIT WATER-OIL-GAS DEGF; Stem Type: NONRISING; Connection Type: SOCKET, WELD, PIPE. 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.