The APF controller operates in parallel to the main controller to ensure scum removal from the pumping station. The APF controller periodically extends the pump operation below the set minimum level until the first air is sucked in, causing the pump to switch off (change in current intensity).
Thanks to this procedure, the pump sucks in the scum along with all floating parts and fat in the last phase of its operation, which results in self-cleaning of the sewage pumping station. The frequency of switching on the system can be set in any range depending on the specificity of the sewage (usually this system is started 10 times a day).
The operator has the ability to select the system operating frequency.
Reliable Flygt pumps are used in many sewage pumping stations, including: MPWiK Warszawa, PWK Legionowo, Cyfrowy Polsat, Przedsiębiorstwo Komunalne Nadarzyn, Zakład Usług Komunalnych Sp. z oo in Warka, Austria Juice Group, Sewage Treatment Plant in Sułkowice, MZGK Sp. z oo in Dęblin, PGK in Żyrardów, ZGK Konstancin Jeziorna, State Archives, Tarnobrzeskie Wodociągi Sp. z oo, POP in Mszczonów (main pumping station)