The Disk,valve, cataloged under National Stock Number 4820-01-220-2302, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is William Powell Company, the Dba Powell Valve Div the Starflo Corporation. Government technical data includes 9 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 | 4820-01-220-2302 |
| Primary Part Number | 055381 ITEM 32 |
| Item Name | Disk,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | William Powell Company, the Dba Powell Valve Div the Starflo Corporation |
| Status | ACTIVE |
| Shank Diameter | 3.986 INCHES MINIMUM AND 3.990 INCHES MAXIMUM IN |
| Flange Seat to Disk End Height | 5.625 INCHES NOMINAL IN |
| Pressure Rating | 1500.0 POUNDS PER SQUARE INCH (PSI) NOMINAL LBS |
| Outside Diameter | 5.652 INCHES MINIMUM AND 5.654 INCHES MAXIMUM IN |
| Style Designator | POPPET |
| Seat Angle | 60.0 DEGREES NOMINAL |
| Inside Diameter | 2.922 INCHES NOMINAL IN |
| Media for Which Designed | STEAM |
| Material | STEEL |
| 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 |
|---|---|
| 130720 | William Powell Company, the Dba Powell Valve Div the Starflo Corporation (USA) |
| 055381 ITEM 32 PRIMARY | William Powell Company, the Dba Powell Valve Div the Starflo Corporation (USA) |
NSN 4820-01-220-2302 is a Disk,valve, manufactured by William Powell Company, the Dba Powell Valve Div the Starflo Corporation, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-220-2302 has 2 manufacturer part numbers on file: 130720 (William Powell Company, the Dba Powell Valve Div the Starflo Corporation), 055381 ITEM 32 (William Powell Company, the Dba Powell Valve Div the Starflo Corporation).
Key specifications for 055381 ITEM 32: Shank Diameter: 3.986 INCHES MINIMUM AND 3.990 INCHES MAXIMUM IN; Flange Seat to Disk End Height: 5.625 INCHES NOMINAL IN; Overall Height: 7.250 INCHES NOMINAL IN; Pressure Rating: 1500.0 POUNDS PER SQUARE INCH (PSI) NOMINAL LBS. 9 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.