DOSING AND MIXING UNIT FOR POLYOL AND AIR
The polymer industry offers numerous applications for continuous dosing of gases such as air, nitrogen, or CO2 at high operating pressures. The gas is often dispersed or completely dissolved using a static mixer. The dosing process needs to be both continuous and pulsation-free since static mixers are typically characterized by radial mixing performance. The dosing technology needs to be carefully selected for this reason, especially when high pressures are involved. We have developed a new compact dosing unit for accurately dosing gases up to a service pressure of 200 bars, enabling precise, continuous, and pulsation-free gas dosing.
If air is the measured fluid, the high-pressure gas dosing unit can be connected to any standard air compressor that provides compressed air to the system at a minimum pressure of 8 bars and a pressure dew point of approximately 5°C. The air is filtered and optionally cooled within the high-pressure gas system to achieve optimal dosing accuracy in continuous processes. Thanks to its exceptionally compact design, the system can be positioned directly at the injection nozzle to further enhance its operational reliability. The dosing valve is additionally equipped with a special product trap to prevent uncontrolled backflow – a common issue that could otherwise damage this costly device beyond repair.
