... multi-lines tubes, final distill water match requirements. structure 1. three-stage steam-water separation structure; structure 2. internal spiral steam ... EU relative regulation.Model difference: HM DW-III series, three effects;HM DW-IV series, four effects, save about 23% energy than ... energy than HM DW-VI series, save 100% water than HM DW-VI series; HM DW-VIII series, eight effects, save about 10 ...