Pre filter

 Before the main pipe is installed, the visible impurities are filtered to protect the downstream water equipment. The pre filter mainly used Shun Chong type and siphon type, but are known to recoil filter, Shun Chong type has the advantages of simple structure, such as the use of shunt type design can realize automatic flushing, filtering accuracy of mainly in the 50-100 microns. 2011 New "with the backwash of the shunt filters" invention patent, using the invention patent "counter recoil pre filter", that is, to possess the suitable flushes type pre filter has the advantages: the shunt type design can realize automatic flushing, such as filling scale inhibitor can realize the function of scale inhibition, and siphon type pre filter can absorb the advantages of embedded type impurities, and rinse thoroughly, so counter recoil pre filter filtering precision between 5-50 microns.