The Ring,valve Piston, cataloged under National Stock Number 4820-01-446-9818, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Portland Valve Llc. Government technical data includes 2 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 | 4820-01-446-9818 |
| Primary Part Number | 1.50IN 4C2236TT IT18 |
| Item Name | Ring,valve Piston |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Portland Valve Llc |
| Status | ACTIVE |
| General Characteristics Item Description | COMPONENT OF BALL VALVE,NSN 4820-01-446-9571 |
| Material | STEEL CORROSION RESISTING |
| 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 |
|---|---|
| 1.50IN 4C2236TT IT18 PRIMARY | Portland Valve Llc (USA) |
| 1.50IN 4C2236TT IT18 | Valve Automation and Control of San Diego Dba Valve Automation & Control of San Diego Div Valve Automation and Controls of (USA) |
NSN 4820-01-446-9818 is a Ring,valve Piston, manufactured by Portland Valve Llc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-446-9818 has 2 manufacturer part numbers on file: 1.50IN 4C2236TT IT18 (Portland Valve Llc), 1.50IN 4C2236TT IT18 (Valve Automation and Control of San Diego Dba Valve Automation & Control of San Diego Div Valve Automation and Controls of).
Key specifications for 1.50IN 4C2236TT IT18: General Characteristics Item Description: COMPONENT OF BALL VALVE,NSN 4820-01-446-9571; Part Name Assigned by Controlling Agency: COMPRESSION RING; End Item Identification: STRATEGIC SEALIFT CONVERSION SHIPS CLASS; Material: STEEL CORROSION RESISTING. 2 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.