Dosing / Dispensing
Accurate dosing solutions for filling and discharging applications
From mg to tons
From dosing powders into reactors in API facilities, dispensing powder into IBCs in OSD manufacturing plants to final packaging into liners or vials, Dec has developed a wide range of solutions for filling or emptying applications be it for batch or continuous operation.
There are different ways of dosing depending on the quantity and the accuracy to be achieved, ie:
Volumetric filling will involve the use of a pre-calibrated chamber with a fixed or variable volume, which can be filled under vacuum and emptied either by pressure or mechanically. Volumetric systems work on the principle of the PTS Powder Transfer System® or the µPTS. By carrying out successive filling and emptying cycles, it is possible to fill a container with a predetermined amount of powder. The vacuum effect in the chamber allows to achieve high accuracy of 2% RSD on small dosing volumes.
Gravimetric Dosing will involve the use of a scale controlling the dosing organ. Filling can be done either by using gravity when sufficient height is available, in a remote place in case of lacking head room below the equipment or when several process equipment are to be emptied through a single filling station. In these cases the powder will be transferred by PTS Powder Transfer System® and accurately dispensed by combining it with the DosiValve® system.
Gravimetric-Volumetric dosing is mostly used to achieve very accurate filling for small quantities, where scale systems are become a limited option. Rapid dosing can be realized under gravity but the final adjustment is done volumetrically by using a small calibrated chamber. (see Microdosing)