How does the PRE system work?

During the process of cleaning water from a spray booth, the created sludge is collected in a big-bag placed in a dedicated bin. This bag is made of a fabric that allows water to pass through and traps the sludge – in a way, it acts as a large filter. Once the bag has been filled, it is tied up and, together with this basket, placed inside the PRE unit. There, during operation, a pneumatic cylinder exerts uniform pressure on the sludge with great force, removing excess water from it. The recovered water either returns to the circuit by gravity or is transported by means of a pump. Once the sludge pressing is complete, the bag is removed from the basket using a forklift. The minimum cycle duration is 4 hours, but for best results we recommend extending the cycle to over than ten hours.

A version to work in the Ex II zone can also be manufactured on request.

The degree of sludge weight reduction is usually in the range of 30-70%, but it depends on a number of different factors. This is the reason why we start the discussions about the PRE system with a technical consultation and why we take samples from a given system. We subject these samples to tests simulating the actual process which allows us to determine the amount of recoverable water. This step is necessary in order to make a decision on the implementation of a PRE system. Contact us and during a short conversation we will determine if there is any way that we can support your paint shop.