The Valve,check, cataloged under National Stock Number 4820-01-654-1464, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Stauff Corp. 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 | 4820-01-654-1464 |
| Primary Part Number | RV-20-07-B-SS |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Stauff Corp |
| Status | ACTIVE |
| Connection Style | SOCKET (TUBE) SECOND END |
| Nominal Length | 5.00 MILLIMETERS ALL ENDS MM |
| Minimum Operating Temp | -20.0 CELSIUS DEGC |
| Connection Type | THREADED INTERNAL PIPE ALL ENDS |
| Style Designator | STRAIGHT THRU |
| Valve Size | 20.0 MILLIMETERS MM |
| Thread Direction | RIGHT-HAND SECOND END |
| Nominal Thread Size | 1.8 INCHES SECOND END IN |
| Maximum Operating Temp | 100.0 CELSIUS SINGLE RESPONSE DEGC |
| Nominal Width | 1.97 MILLIMETERS ALL ENDS MM |
| Material | STEEL CORROSION RESISTING BODY |
| Thread Series Designator | BSP.F ALL ENDS |
| Opening Pressure Setting | 0.5 BAR |
| 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 |
|---|---|
| RV-20-07-B-SS PRIMARY | Stauff Corp (USA) |
NSN 4820-01-654-1464 is a Valve,check, manufactured by Stauff Corp, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-654-1464 has 1 manufacturer part number on file: RV-20-07-B-SS (Stauff Corp).
Key specifications for RV-20-07-B-SS: Connection Style: SOCKET (TUBE) SECOND END; Nominal Length: 5.00 MILLIMETERS ALL ENDS MM; Minimum Operating Temp: -20.0 CELSIUS DEGC; Connection Type: THREADED INTERNAL PIPE ALL ENDS. 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.