Allied Filter, UK Filter Manufacturers. Latest Industry News: Pall Corporation take over FSI Filters Filter Specialists Inc (FSI Filters), a supplier of filtration products and solutions based in Michigan, America, has been acquired by the Pall Corporation. Pall Corporation is an S&P 500 company and is adding FSI’s products and technologies to its existing portfolio. … Continue reading Pall Corporation takes over Filter Specialists Inc (FSI Filters)