Counter-directed ribbon movement in a horizontal mixing trough.
Inner and outer helical ribbons rotate within the horizontal trough and move material in opposite axial directions. The resulting convection, circulation and shear repeatedly redistribute the batch.

| Model | WLDH-0.1 | WLDH-0.3 | WLDH-0.5 | WLDH-1 | WLDH-1.5 | WLDH-2 | WLDH-3 | WLDH-4 | WLDH-6 | WLDH-8 | WLDH-10 |
| Batch Capacity (kg) | 30–50 | 100–150 | 200–300 | 400–600 | 600–900 | 800–1200 | 1200–1800 | 1600–2400 | 2400–3600 | 3200–4800 | 4000–6000 |
| Motor Power (kW) | 1.5–4 | 3–5.5 | 4–11 | 7.5–15 | 11–18.5 | 15–22 | 18.5–30 | 22–37 | 37–55 | 37–55 | 45–75 |
| Equipment Weight (kg) | 300 | 500 | 900 | 1400 | 1900 | 2500 | 3100 | 3600 | 5300 | 6800 | 7800 |