The Valve,butterfly, cataloged under National Stock Number 4820-01-433-4448, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Core Industries Inc. Dba Mueller Steam Specialty. Government technical data includes 13 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-433-4448 |
| Primary Part Number | 4IN 52CHQ3-1 |
| Item Name | Valve,butterfly |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Core Industries Inc. Dba Mueller Steam Specialty |
| Status | ACTIVE |
| Style Designator | STRAIGHT THRU |
| Material Document and Classification | ASTMB61 ASSN STD SINGLE MATERIAL RESPONSE BODY |
| Material Document and Classification | ASTMA276 ASSN STD SINGLE MATERIAL RESPONSE STEM |
| Material Document and Classification | ASTMB164 ASSN STD SINGLE MATERIAL RESPONSE FLOW CONTROL DEVICE |
| Operating Pressure | 200.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Valve Size | 4.000 INCHES IN |
| Mounting Facility | LUG(S) |
| Media for Which Designed | WATER-OIL-GAS SINGLE RESPONSE |
| Material | COPPER ALLOY BODY |
| Material | NICKEL ALLOY FLOW CONTROL DEVICE |
| Material | STEEL COMP 316 STEM |
| Material | RUBBER SEAT |
| 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 |
|---|---|
| AN-4.0-52-Y | Core Industries Inc. Dba Mueller Steam Specialty (USA) |
| 4IN 52CHQ3-1 PRIMARY | Core Industries Inc. Dba Mueller Steam Specialty (USA) |
| 4IN 52CHQ3-1 | W. & O. Supply, Inc. Div W&o Norfolk (USA) |
NSN 4820-01-433-4448 is a Valve,butterfly, manufactured by Core Industries Inc. Dba Mueller Steam Specialty, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-433-4448 has 3 manufacturer part numbers on file: AN-4.0-52-Y (Core Industries Inc. Dba Mueller Steam Specialty), 4IN 52CHQ3-1 (Core Industries Inc. Dba Mueller Steam Specialty), 4IN 52CHQ3-1 (W. & O. Supply, Inc. Div W&o Norfolk).
Key specifications for 4IN 52CHQ3-1: Style Designator: STRAIGHT THRU; Material Document and Classification: ASTMB61 ASSN STD SINGLE MATERIAL RESPONSE BODY; Material Document and Classification: ASTMA276 ASSN STD SINGLE MATERIAL RESPONSE STEM; Material Document and Classification: ASTMB164 ASSN STD SINGLE MATERIAL RESPONSE FLOW CONTROL DEVICE. 13 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.