Vertical pressure leaf filter is liquid filtration system consisting of many leaf-shaped filter elements that are stacked inside a vertical vessel… Horizontal Pressure Leaf Filter (shell retraction or bundle retraction) features horizontal pressure vessel, filter leaves, pneumatic vibrator assembly, bottom structure housing, hydraulic power pack for bonnet ring opening / closing and shell or bundle retraction. Leaf filter elements are the most critical parts of either vertical pressure leaf filter or horizontal pressure leaf filter. Generally, pressure leaf filters, or pressure vessels consist of 10 to 60 leaves, stacked inside a vertical or horizontal vessel.