The Valve,check, cataloged under National Stock Number 4820-01-423-4890, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Kf Industries Dba Contromatics. Government technical data includes 16 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-423-4890 |
| Primary Part Number | 7099-1179P41912 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Kf Industries Dba Contromatics |
| Status | ACTIVE |
| Flow Control Device | DISK |
| Flange Shape | ROUND WITH HOLES ALL ENDS |
| Flange Face Design | RAISED STRAIGHT ALL ENDS |
| Bolt Circle Nominal Diameter | 25.000 INCHES ALL ENDS IN |
| Mounting Position | HORIZONTAL OR VERTICAL |
| Connection Type | FLANGE ALL ENDS |
| Style Designator | STRAIGHT THRU FLANGED ENDS |
| Operating Pressure | 150.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Valve Size | 20.000 INCHES IN |
| Disk Loading Method | SPRING |
| Bolt Hole Quantity | 6 ALL ENDS |
| Face to Face Distance | 9.750 INCHES IN |
| Material | NICKEL ALLOY FLOW CONTROL DEVICE |
| Material | NICKEL ALLOY SEAT |
| Material | ALUMINUM ALLOY BODY |
| Valve Operation Method | AUTOMATIC |
| 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 |
|---|---|
| 7099-1179P41912 PRIMARY | Kf Industries Dba Contromatics (USA) |
| BOM7099-1179P41912 | Kf Industries Dba Contromatics (USA) |
NSN 4820-01-423-4890 is a Valve,check, manufactured by Kf Industries Dba Contromatics, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-423-4890 has 2 manufacturer part numbers on file: 7099-1179P41912 (Kf Industries Dba Contromatics), BOM7099-1179P41912 (Kf Industries Dba Contromatics).
1 possible match (shared part number, not a government interchangeability claim): 4820-01-423-5696. Verify interchangeability with system specifications before substitution.
Key specifications for 7099-1179P41912: Flow Control Device: DISK; Flange Shape: ROUND WITH HOLES ALL ENDS; Flange Face Design: RAISED STRAIGHT ALL ENDS; Bolt Circle Nominal Diameter: 25.000 INCHES ALL ENDS IN. 16 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.