The Perforated Plate Screen (patent pending) employs the hydropression effect to clean its static perforated plate. Hydropression cleaning has been proven to be effective on some of the most stubborn forms of contaminants, including hair, grease, plastics, paper and small particulate matter. Combined with a static perforated plate, ultra-fine screening is accomplished with long-term reliability and without the operational expense associated with dynamic seals or moving screen segments.