In order to achieve better water purification effect, Douai is carefully developed. The R&D members gradually optimize the filter systems, including pre-filters, mid-filters, and post-filters. It can be designed with the keyed on/off switch to prevent unauthorized access or operation
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The seal materials used in Douai are guaranteed to be chemically compatible with any fluids or solids, including solvents, cleaners or steam. It is manufactured to the standards such as EN 60825
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Douai has to go through a wide range of production processes, including material washing, CNC cutting, welding, plating, chemical spraying, and so on. It ensures the materials being cut have smooth edges
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The design of Douai is carefully conducted. Its electric circuit parts are finely arranged after consideration of circuit compatibility. It offers the potential for faster cutting speeds
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Douai has passed the following physical and mechanical tests including strength test, fatigue test, hardness test, bending test, and rigidity test. Critical safety features are integrated into the design
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The implementation of the quality control system ensures the product to be defect-free. Critical safety features are integrated into the design