The Valve,check, cataloged under National Stock Number 4820-01-562-7283, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Dixon Valve & Coupling Company, Llc Div Dixon Fire. Government technical data includes 2 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 | 4820-01-562-7283 |
| Primary Part Number | VR4100 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Dixon Valve & Coupling Company, Llc Div Dixon Fire |
| Status | ACTIVE |
| Media for Which Designed | HYDRAULIC FLUID, PETROLEUM BASE SINGLE RESPONSE |
| Material | ALUMINUM BODY |
| 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 |
|---|---|
| VR4100 PRIMARY | Dixon Valve & Coupling Company, Llc Div Dixon Fire (USA) |
NSN 4820-01-562-7283 is a Valve,check, manufactured by Dixon Valve & Coupling Company, Llc Div Dixon Fire, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-562-7283 has 1 manufacturer part number on file: VR4100 (Dixon Valve & Coupling Company, Llc Div Dixon Fire).
Key specifications for VR4100: Special Features: 4 IN. VAPOR RETURN VALVE ALLOWS TRANSFER OF UNDERGROUND STORAGE TANK VAPOR TO THE TANKER COMPARTMENTS DURING THE OFF LOADING OF PETROLEUM; 4 IN. BY 4 IN. NPT IN; Media for Which Designed: HYDRAULIC FLUID, PETROLEUM BASE SINGLE RESPONSE; Part Name Assigned by Controlling Agency: VAPOR RETURN VALVE; Material: ALUMINUM BODY. 2 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.