ENVOTECH LTD - ЕНВОТЕХ ЕООД Water and wastewater treatment engineering - Инженеринг по пречистване на питейни и отпадъчни води

Bottom plate double flow valve, DPI

 - For a good regenerant  solution
   distribution when the flow  rate is very
   low and in opposite direction to the
   running  flow

Upper plate double flow valve, DPS