At first i thought everything was done but after a closer look on the PCB and the pump i noticed that the pump also was powered by mains voltage. 

I started to look for a replacement pump but either they was very expensive or from an unreliable source. So the only option left was to convert the existing pump.

The pump is an electromechanical diaphragm pump so i was hoping to be able to replace or rewire the electromagnet inside.

After opening up the pump i saw that it had two coils connected in parallell so i rewired them in series to get the correct voltage drop for 230V. 

The device is built for a mains frequency of 60 Hz and i will run it on 50 Hz. I guess this will limit the max airflow but i don't think that will be an issue.