For this reason, prior to initial operation, these lines need to be flushed or disinfected in compliance with the respective drinking water ordinance (TrinkvW 2001). Mobile disinfection units ensure the necessary measures are performed according to requirements while providing hygienically pure water.
 The SD 75 flushing and disinfection unit with delta® diaphragm metering pump is specifically designed for mobile applications where disinfectants can be metered easily and precisely on site. All disinfectants that are approved in accordance with DVGW W 291 can be used and disposed of without harming the environment. Such disinfectants include hydrogen peroxide H2O2, chlorine dioxide ClO2 or sodium hypochlorite. These are gas-emitting media and can therefore lead to reduced pump output or to situations where the medium is not pumped at all. Due to chemical reactions, the substances form gas bubbles that collect on the intake side of the pump head. The larger the gas bubbles, the less fluid can be conveyed.
Thanks to the use of the delta® diaphragm metering pump, the gas emission is suppressed by a slow intake stroke setting without the need for additional accessories. In addition, the integrated injection control optoGuard® reliably checks whether gas has formed in the liquid end.
The delta® diaphragm metering pump with controlled solenoid drive optoDrive® unit meters the disinfectant into the Luitpold Schott SD 75 mobile system at a maximum rate of 3.0 l/h. The metering rate can be adjusted from 1 to 100 %. The SD 75 supplied by the Speyer-based equipment manufacturer can be connected directly to standardised connections of mains drinking water systems, e.g. via a Geka coupling.
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