
Variable and Fixed Drive Decanter Centrifuges
S3S matches your flow rate and separation targets with BOS 20, BOS 40, BOS 60, and 5800 decanter centrifuges in full-variable and fixed-drive configurations, backed by replacement units to minimize downtime and keep your operation moving.
Decanter centrifuge specifications
| Model | Bowl, diameter × length (in) | Capacity (gpm) | Solids removal (ton/h) | Main drive (hp) | Back drive (hp) | Feed pump | Max speed and G-force | Dimensions (L × W × H) | Shipping weight (lb) | Power | Enquire |
|---|---|---|---|---|---|---|---|---|---|---|---|
| BOS 20 A Series | 14 × 56 | 265 | 5.5 | 50 | 15 | 3 in, 10 hp | Not listed | 13 ft × 4 ft 6 in × 5 ft | 6,000 | 1 × 480 V, 100 A, 3W4P | Enquire about the BOS 20 A Series |
| BOS 20 D Series | 14 × 56 | 265 | 5.5 | 50 | 20 | 3 in, 10 hp | Not listed | 14 ft 6 in × 4 ft 10 in × 4 ft 3 in | 7,500 | 1 × 480 V, 100 A, 3W4P | Enquire about the BOS 20 D Series |
| BOS 40 L Series | 19 × 80 | 440 | 12 | 125 | 20 | 4 in, 20 hp | Not listed | 16 ft × 4 ft × 4 ft 11 in | 12,000 | 2 × 480 V, 100 A, 3W4P | Enquire about the BOS 40 L Series |
| BOS 40 T Series | 19 × 80 | 440 | 12 | 125 | 20 | 4 in, 20 hp | Not listed | 15 ft 2 in × 3 ft 9 in × 4 ft 8 in | 10,500 | 2 × 480 V, 100 A, 3W4P | Enquire about the BOS 40 T Series |
| BOS 60 | 22.6 × 96 | 705 | 17 | 150 | 30 | 4 in, 20 hp | Not listed | 17 ft × 4 ft 3 in × 5 ft | 14,500 | 2 × 480 V, 100 A, 3W4P | Enquire about the BOS 60 |
| 5800 horizontal centrifuge | 16 × 56 | Not listed | Not listed | 60 | Not listed | Not listed | 3,600 rpm, 2,944 G | Not listed | Not listed | 480 VAC through VFD, 53.8 A with NE-60 feed pump | Enquire about the 5800 horizontal centrifuge |
BOS models run a variable-speed main drive, back drive, and feed pump. Capacity and solids removal are rated on fresh water. The 5800 is stainless steel with a tungsten carbide conveyor, a 57:1 planetary gearbox, and five adjustable pool dams. The Tri-Canter three-phase centrifuge is listed under oil recovery. Sources: BOS Centrifuges data sheet (2021), 5800 Horizontal Centrifuge data sheet (2014).
Talk to an S3S centrifuge expert.
S3S matches the centrifuge to your flow rate, solids characteristics, and target cut point, with skilled operators and backup equipment to maintain performance and minimize downtime. Bench testing in the S3S lab sets the polymer and dose before full-scale operation.

