Profile: Sperry & Co., D. R. is a filter press manufacturing company. We test filtration application, size the filter press, and insure correct application of the equipment. We specialize in chemical process and wastewater treatment. Industries and processes utilizing filter presses include chemical, general industrial, municipal/industrial wastewater, beverage clarification, petrochemical & environmental cleanup. Our products include filter presses, filter press plates and sludge dryers. We also have a fully tooled machine shop, filter media shop, foundry and research laboratory with complete bench scale equipment.