The Valve,check, cataloged under National Stock Number 4820-01-244-3539, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Floworks Usa Lp Dba Flotech Div Jacksonville. Government technical data includes 8 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-244-3539 |
| Primary Part Number | 31065B |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Floworks Usa Lp Dba Flotech Div Jacksonville |
| Status | ACTIVE |
| Flow Control Device | DISK |
| 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 | 10.000 INCHES IN |
| Media for Which Designed | WATER-OIL-GAS 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 |
|---|---|
| 31065B PRIMARY | Floworks Usa Lp Dba Flotech Div Jacksonville (USA) |
| Reference | Meaning |
|---|---|
| SK-N0 283 10IN | C/1 Advisory reference — outside the item-of-supply concept Floworks Usa Lp Dba Flotech Div Jacksonville |
NSN 4820-01-244-3539 is a Valve,check, manufactured by Floworks Usa Lp Dba Flotech Div Jacksonville, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-244-3539 has 1 manufacturer part number on file: 31065B (Floworks Usa Lp Dba Flotech Div Jacksonville).
Key specifications for 31065B: Flow Control Device: DISK; Connection Type: FLANGE ALL ENDS; Style Designator: STRAIGHT THRU FLANGED ENDS; Operating Pressure: 150.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS. 8 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.