The Rotary Valve discharge materials in constant quantity by regulating rotating speed. Two styles of Rotary Valves are the standard RVT series and the sanitary RVS series; the difference is in the removable rotor of the RVS series for cleaning purposes. Both types have spotlessly polished interiors, and both support air delivery.
| Model | flange facing | Discharge Rate |
| RVT-4 | 4” 10K/150P | 1 |
| RVT-6 | 6” 10K/150P | 2 |
| RVT-8 | 8” 10K/150P | 4 |
| RVS-6 | 6” 10K/150P | 1 |
| RVS-8 | 8” 10K/150P | 2 |