The Valve,check, cataloged under National Stock Number 4820-01-470-8850, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Velan Valve Corp.. Government technical data includes 13 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-470-8850 |
| Primary Part Number | B10-2084P-02TS (7840-018 REV X) |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Velan Valve Corp. |
| Status | ACTIVE |
| Flow Control Device | DISK |
| Nominal Pipe Size Accommodated | 3.000 INCHES ALL ENDS IN |
| Connection Style | SOCKET (TUBE) ALL ENDS |
| Mounting Position | VERTICAL |
| Connection Type | BUTT WELD PIPE ALL ENDS |
| Style Designator | STRAIGHT THRU |
| Material Document and Classification | ASTM A105 ASSN STD SINGLE MATERIAL RESPONSE BODY |
| Operating Pressure | 750.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Maximum Operating Temp | 705.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Disk Loading Method | WEIGHT |
| Media for Which Designed | STEAM SINGLE RESPONSE |
| Material | STEEL 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 |
|---|---|
| CD SHEET P2-44978 ITEM 041 REV C | Velan Valve Corp. (USA) |
| B10-2084P-02TS (7840-018 REV X) PRIMARY | Velan Valve Corp. (USA) |
| P2-44978-G01 ITEM 041 | Velan Valve Corp. (USA) |
| Reference | Meaning |
|---|---|
| 7840-018 | D/9 Drawing number reference only Velan Valve Corp. |
NSN 4820-01-470-8850 is a Valve,check, manufactured by Velan Valve Corp., classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-470-8850 has 3 manufacturer part numbers on file: CD SHEET P2-44978 ITEM 041 REV C (Velan Valve Corp.), B10-2084P-02TS (7840-018 REV X) (Velan Valve Corp.), P2-44978-G01 ITEM 041 (Velan Valve Corp.).
2 possible matches (shared part number, not a government interchangeability claim): 4820-01-470-9090, 5310-01-476-9843. Verify interchangeability with system specifications before substitution.
Key specifications for B10-2084P-02TS (7840-018 REV X): Flow Control Device: DISK; Nominal Pipe Size Accommodated: 3.000 INCHES ALL ENDS IN; Connection Style: SOCKET (TUBE) ALL ENDS; Mounting Position: VERTICAL. 13 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.