![Sodium sulphate](/3wzg0da/110.jpg)
Sodium sulphate
The Boerger Protect pumps the sodium sulfate solution from the storage tank back to this storage tank. In the meantime, sulfuric acid is mixed in on the suction side. A pH value can be measured using a meter attached to the pressure side. This procedure is repeated until the sodium sulfate solution indies a pH value of 7.