... operation,safe and aborsaving, Filter plates are made of strengthwnwd polypropylene through mold pressing ,hign instrength.lightin weight,corrosion resisted,non-poisonousandodorless ... contyolled or computercontrolled,conpletelyautomic;Hdraulic devicesareadopted for pressing and releasing filter plates withmaximum pressing pressure of 25Mpa,and automatic pressure maintaining by using ...