Leading the world with innovative products

FSI is the industry leader in innovative, state-of-the-art filtration products and solutions. With over 48 active patents,including Polyloc®  ring and Polymicro® seamless filter bags, we continue to provide our customers solutions to their filtration needs. Established in 1972 in Michigan City, Indiana, FSI has grown into a worldwide supplier of superior-value filtration products and solutions. An important factor in our competitive edge is that we maintain complete control over the entire manufacturing process: FSI extrudes fiber, needles felt, mold injects plastic components, sews/welds filter bags, and manufactures a complete advanced design, higher efficiency cartridge line engineered from extensive research and development, backed by state-of-the-art manufacturing. We use a patented process to manufacture our Vorex&reg filter cartridges. This unique process thermally bonds pure polypropylene microfibers into a graded pore structure that prevents surface loading and results in a true depth filter cartridge that is perfect for many high-end users.

Our standard Vorex cartridge is a nominally rated cartridge that supports many industrial and chemical applications. The Vorex HP filters provide a particle retention rate of 99% for true absolute filtration. Nominally rated Polywound® cartridges are available in a wide array of yarn and core materials, and are designed to meet a variety of industrial processing needs. In addition, we engineer and fabricate ASME-code filter housings and equipment – ISO 9001 Certified, ASME Certified, FDA Compliant, and NSF Certified.