Optimal drainage and retention are central issues when it comes to paper production. The right amount of additive at the right time increases both quality and productivity. The Dynamic Drainage Analyzer (DDA) is a more advanced design of the common drainage testers, developed to give an accurate simulation of the conditions on a modern paper machine by utilizing vacuum during the drainage process.
The fifth generation of the Dynamic Drainage Analyser, DDA, is updated in close cooperation with DDA users. DDA 5 is based on proven technology of DDA 4 with over 95 units sold worldwide.The unique vacuum drainage simulates conditions on paper machines and the shear can be precisely controlled to simulate pumps and other equipment. DDA has a turbidity sensor by which retention values are presented automatically. Drainage speed, initial drainage and temperature readings are presented for chosen time intervals. The productivity has been increased as the equipment is automatically cleaned after each analysis.
- Retention based on the new turbidity sensor.
- Drainage rate.
- Initial drainage.
- Temperature readings.
- Increased productivity
- Quick results and easy operation.
- Improved easy to use chemical dosage unit.
- Automatic cleaning for increased productivity.
- Increased sensitivity
- Better accuracy lower freeness levels.
Flexibility & control
New user friendly design and easy to use interface.
Compact and light design for mobility.
Easy to control experiment conditions.
Exchangeable wire cloths give possibility to run
samples with very different characteristics.
Tailor-made wire cloths are available on request.
Paper makers, chemical manufacturers and R&D companies. The effects of different pulp mixtures, degrees of reᰟning, additions of chemicals and fillers on drainage conditions can be studied.