Frame of filter press is made of Q235 high strength steel, much stronger, anticorrosion treatment on the surface. External size of filter plate:500*500mm, materials of filter plate:reinforced polypropylene.Cost for maintenance of filter press is lower automatically maintain pressure or mechanically maintain pressure Manual shifting plate ,Closed/open discharge Washing/blowing type Pistons of filter press are made by steel 45 and plated with 0.06 chromium after surface processing with feature of high hardness, anti-wearing, long life Operate easily by electric control cabinet of filter press.