TGL’s Auto-life division manufacturing the two main group of diaphragms: Automotive Transportation products: A full range of Air Brake Diaphragms for all types of trucks, buses and heavy–duty engineering equipment. Water Distribution, Irrigation, Industry, Fire protection Sewage: A wide range of high quality Valves Diaphragms reinforced with fabric / metal for water works distribution systems, Agriculture, Fire protection, Sewage and Industrial Liquid Systems.