ErtelAlsop located in Kingston, NY is a division of Stavo Industries, Inc. ErtelAlsop manufactures state-of-the-art plate and frame filter presses, pumps, agitators, bottle filters, and other equipment for liquid processing. Our customer base is filled with clients who have been buying from us for over 80 years. Our commitment to customer service and willingness to modify our designs to meet customer requirements continues to make ErtelAlsop stand apart from its competitors.