Alpha process engineers manufactures nutsche type filter expression drier that are useful for separating solids from liquids. This drier is enclosed and normally operated under insert gas pressure or under vaccum. The filter expression driers come with a spreader mechanism that agitates slurry during cake washing smoothens & expresses [squeezes] the cake during filtration and assists the automatic discharge of the cake. The drier provides excellent separating qualities with good medium filtration in optimum time. The filter expression driers are useful for filtration application and provide lowest residual moisture in cake compared to other similar systems. These filter expression dryers find applications for manufacture of various toxic chemicals, insecticides, pesticides, dyes & dye intermediates, pharmaceuticals products, etc.