Standard: EN 26330
This system is designed to control the characteristics of the feed water supplied to laboratory test systems for washing machines.
To supply the washing machines under test with standardized water conditions over time, the following parameters are maintained constant:
- Water flow rate: 200 liters/hour
- Water hardness: 2.5 ± 0.2 mmol/L
- Water temperature programmable at +15°C ± 2°C, +20°C ± 2°C, +60°C ± 2°C
- Water pressure: 240 ± 50 kPa
Water hardness is controlled by an analyzer in a water reservoir, which adds a correction chemical solution via a dosing pump. The pump draws the solution from a container and injects it into the reservoir, maintaining the water hardness at the preset value.
A centrifugal pump transfers the water to a second accumulation tank that supplies the booster pump. The pressure is kept constant by an inverter that adjusts the frequency based on the pressure.
