The Valve,flow Control, cataloged under National Stock Number 4820-01-633-1907, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Siemens Building Technologies Inc Div Fire Safety. Government technical data includes 14 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-633-1907 |
| Primary Part Number | VXG41.4001 |
| Item Name | Valve,flow Control |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Siemens Building Technologies Inc Div Fire Safety |
| Status | ACTIVE |
| Stem Material | STEEL CORROSION RESISTING |
| Disk Material | STEEL CORROSION RESISTING |
| Flow Control Device | DISK |
| Nominal Pipe Size Accommodated | 40.0 MILLIMETERS MM |
| Body Material Document and Classification | BRONZE CUXN5ZN5PB2 MFR REF SINGLE MATERIAL RESPONSE |
| Disk Material Document and Classification | STAINLESS STEEL MFR REF SINGLE MATERIAL RESPONSE |
| Connection Type | THREADED EXTERNAL PIPE |
| End Connection Quantity | 3 |
| Valve Size | 40.0 MILLIMETERS MM |
| Body Material | COPPER ALLOY |
| Seat Material Document and Classification | STAINLESS STEEL MFR REF SINGLE MATERIAL RESPONSE |
| Stem Material Document and Classification | STAINLESS STEEL MFR REF SINGLE MATERIAL RESPONSE |
| Seat Material | STEEL CORROSION RESISTING |
| Thread Series Designator | ISO M |
| 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 |
|---|---|
| VXG41.4001 PRIMARY | Siemens Building Technologies Inc Div Fire Safety (USA) |
NSN 4820-01-633-1907 is a Valve,flow Control, manufactured by Siemens Building Technologies Inc Div Fire Safety, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-633-1907 has 1 manufacturer part number on file: VXG41.4001 (Siemens Building Technologies Inc Div Fire Safety).
Key specifications for VXG41.4001: Stem Material: STEEL CORROSION RESISTING; Disk Material: STEEL CORROSION RESISTING; Flow Control Device: DISK; Nominal Pipe Size Accommodated: 40.0 MILLIMETERS MM. 14 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.