The Valve,check, cataloged under National Stock Number 4820-01-052-8543, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Victor Equipment Co. Government technical data includes 22 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-052-8543 |
| Primary Part Number | 0690-0022 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Victor Equipment Co |
| Status | ACTIVE |
| Flow Control Device | POPPET |
| Connection Style | INVERTED FLARE (TUBE) FIRST END |
| Connection Style | INVERTED FLARE (TUBE) SECOND END |
| Mounting Position | HORIZONTAL OR VERTICAL |
| Connection Type | THREADED EXTERNAL TUBE SECOND END |
| Connection Type | THREADED INTERNAL TUBE FIRST END |
| Style Designator | STRAIGHT THRU |
| Nominal Outside Diameter Tube Accommodated | 0.375 INCHES FIRST END IN |
| Operating Pressure | 125.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Thread Direction | RIGHT-HAND SECOND END |
| Thread Direction | RIGHT-HAND FIRST END |
| Nominal Thread Size | 0.562 INCHES SECOND END IN |
| Nominal Thread Size | 0.562 INCHES FIRST END IN |
| Seat Angle | 30.0 DEGREES ALL ENDS |
| Disk Loading Method | SPRING |
| Media for Which Designed | OXYGEN, GASEOUS SINGLE RESPONSE |
| Thread Class | 2A SECOND END A |
| Thread Class | 2B FIRST END |
| Material | COPPER ALLOY OVERALL |
| Thread Series Designator | UNF FIRST END |
| Thread Series Designator | UNF SECOND END |
| 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 |
NSN 4820-01-052-8543 is a Valve,check, manufactured by Victor Equipment Co, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-052-8543 has 2 manufacturer part numbers on file: 0690-0022 (Victor Equipment Co), CV-30R (Western Enterprises Div of Scott and Fetzer Co).
Key specifications for 0690-0022: Flow Control Device: POPPET; Connection Style: INVERTED FLARE (TUBE) FIRST END; Connection Style: INVERTED FLARE (TUBE) SECOND END; Mounting Position: HORIZONTAL OR VERTICAL. 22 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.