Total Droplet Control
- Consistency – Each VCN™ produces the same droplet spectrum throughout the run, every run.
- Accuracy – Our technical expertise guarantees a closely controlled droplet spectrum
- Adaptability – The VCN™ Unit is available in sizes ranging from 0.8 to 2.5mm and will cope with a wide variety of coating media. If you need help to specify a nozzle for your application please contact us.
This graph shows the control and accuracy of the VCN’s droplet spectrum. This graph was generated an a Malvern Instruments. lnsitec laser diffraction droplet analyser. The Delavan VCN™ was spraying a typical tablet coating medium with a viscosity of approximately 200 cP.
VCN™ Potential Process Time Saving Using High Solids Coating System
| Potential Process Time Saving Using High Solids Coating System | |||
| Process Parameter | HPMC-Based Coating Liquids @ 15% w/w Solids | Copovidone-based Coating Liquids @ 20% w/w Solidsa | Copovidone-based Coating Liquids @ 25% w/w Solidsa |
| VCN™ | Delavan VCN™ x 3 | Delavan VCN™ x 3 | Delavan VCN™ x 3 |
| Pan Loading | 170 | 170 | 170 |
| Gun To Bed Distance (cm) | 28 | 28 | 28 |
| Pan Speed (rpm) | 5 | 7 | 6 |
| Process Air Volume | |||
| (m3/h-1) | 2200 | 2300 | 2300 |
| (cfm) | 1300 | 1350 | 1350 |
| Inlet Air Dewpoint (°C) | 10 to 13 | 10 to 13 | 10 to 13 |
| Inlet Air Temperature (°C) | 60 | 65 | 65 |
| Tablet Bed Temperature (°C) | 39 | 40 | 42 |
| Exhaust-air Temperature (°C) | 45 | 49 | 50 |
| Atomizing-air Pressure (bar) | 2.5 | 2.5 | 2.5 |
| Pattern-air Pressure (bar) | 2 | 3.5 | 3.5 |
| Spray Rate (grams per min-1) | 315 | 388 | 380 |
| Amount of Coating Suspension Applied (kg) | 36.2 | 31.4 | 25.2 |
| Coating Process Time (min) | 115 | 81 | 66 |
| Process Time Savings (%) | - | 30 | 43 |
Literature
