Filter Dryers or Nutsche Filter Dryers as they are also known as batch filters installed for soild-liquid separation of suspensions and for washing, drying and isolation of solids in the chemical, fine chemical and pharmaceutical processing industries. The Nutsche filter dryer consists of cylindrical pressure vessel middle section, dished top head and a flanged bottom with a removable or fixed flat preforated base which supports the filter medium and a top mounted agitator drive with paddles which raises and lowers. This type of filter is often pressure and vacuum rated internally, heated with a jacket and agitator and has a side discharge.