The Valve,ball, cataloged under National Stock Number 4820-01-574-5644, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Flowserve Us Inc. Div Flowserve Cookeville Valve Operation. Government technical data includes 19 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 | 4820-01-574-5644 |
| Primary Part Number | B4446TSW 1.25IN |
| Item Name | Valve,ball |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Flowserve Us Inc. Div Flowserve Cookeville Valve Operation |
| Status | ACTIVE |
| Renewable Seat Ring Type | PRESSED-IN |
| Connection Style | SOCKET ALL ENDS |
| Minimum Operating Temp | -50.0 FAHRENHEIT DEGF |
| Connection Type | UNTHREADED INTERNAL PIPE ALL ENDS |
| Style Designator | STRAIGHT THRU |
| Material Document and Classification | ASTM A105 FORGED ASSN STD SINGLE MATERIAL RESPONSE OR ASTM A216 GR WCB CAST ASSN STD SINGLE MATERIAL RESPONSE BODY |
| Material Document and Classification | ASTM A479 GR 316 SS ASSN STD SINGLE MATERIAL RESPONSE FLOW CONTROL DEVICE |
| Material Document and Classification | ASTM A479 GR 316 SS ASSN STD SINGLE MATERIAL RESPONSE STEM |
| Material Document and Classification | TFE MFR REF SINGLE MATERIAL RESPONSE SEAT |
| Operating Pressure | 1480.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Valve Size | 1.250 INCHES IN |
| Maximum Operating Temp | 400.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Face to Face Distance | 4.160 INCHES IN |
| Media for Which Designed | WATER-OIL-GAS SINGLE RESPONSE |
| Material | STEEL BODY |
| Material | STEEL COMP 316 STEM |
| Material | PLASTIC POLYTETRAFLUOROETHYLENE SEAT |
| Material | STEEL COMP 316 FLOW CONTROL DEVICE |
| Valve Operation Method | AIR |
| 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 |
|---|---|
| B4446TSW 1.25IN | Ives Equipment, Llc (USA) |
| B4446TSW 1.25IN PRIMARY | Flowserve Us Inc. Div Flowserve Cookeville Valve Operation (USA) |
NSN 4820-01-574-5644 is a Valve,ball, manufactured by Flowserve Us Inc. Div Flowserve Cookeville Valve Operation, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-574-5644 has 2 manufacturer part numbers on file: B4446TSW 1.25IN (Ives Equipment, Llc), B4446TSW 1.25IN (Flowserve Us Inc. Div Flowserve Cookeville Valve Operation).
Key specifications for B4446TSW 1.25IN: Renewable Seat Ring Type: PRESSED-IN; Connection Style: SOCKET ALL ENDS; Minimum Operating Temp: -50.0 FAHRENHEIT DEGF; Connection Type: UNTHREADED INTERNAL PIPE ALL ENDS. 19 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.