Lydall Filtration/Separation designs and manufactures technically advanced air and liquid filtration products ranging from microglass media to a variety of synthetic and membrane composites. The company is affiliated with Lydall. A New York Stock Exchange-listed company, Lydall is headquartered in Manchester, Conn. The company, with operations in the United States, France and Germany and sales offices in Europe and Asia, focuses on specialty-engineered products for the thermal/acoustical and filtration/separation markets. In the United States, Lydall Filtration/Separation is located in Rochester, N.H.