Amar engineering works manufactures pressure leaf filter which consists of vertical mild steel vessel with a number of vertical stainless steel filter leaves. Since both sides are used for filtering, a large filtration area is obtained in a relatively small vessel. The oil slurry is pumped into the filter. A filtering layer is formed on the leaves and the filtration starts through the cake.The filtered oil is taken to outlet through the manifold. The solid accumulates on the filter leaves and thick cake is formed. When the pressure reaches 3-3.5 kg/cm sq, the cake is dried with steam/air and discharged by a mechanically operated vibrator through a large sized bottom outlet and hence no opening of filter is required for cleaning of leaves. No filter cloth is required for filtration. Rate of filtration is very high. Oil retention in filter cake is low. The operating vessel is close and compact, so operation is very clean. The filters are available in sizes of 5 to 40 m sq.
