The Valve,check, cataloged under National Stock Number 4820-01-477-1963, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Velan Valve Corp.. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 4820-01-477-1963 |
| Primary Part Number | 2191-1 3 NPS |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Velan Valve Corp. |
| Status | ACTIVE |
| 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 |
|---|---|
| 2191-1 3 NPS PRIMARY | Velan Valve Corp. (USA) |
| Reference | Meaning |
|---|---|
| 3IN-2HMM10-4L | C/1 Advisory reference — outside the item-of-supply concept Velan-Proquip Incdba Valve Mfrvelan Proquip Div Div Velan Proquip |
NSN 4820-01-477-1963 is a Valve,check, manufactured by Velan Valve Corp., classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-477-1963 has 1 manufacturer part number on file: 2191-1 3 NPS (Velan Valve Corp.).
Key specifications for 2191-1 3 NPS: Special Features: NPS 3 4 HOLES WT=18 POUNDS LBS. 0 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.