Krapf & Lex develops and produces effective filters, ventilation grilles and pressure protection systems for fresh air and ex ... haust air systems in railway vehicles since more than 50 years. To prevent the penetration of dust, water and snow into the inside of vehicles, effective filter systems for fresh air and exhaust air of HVAC systems as well as for various cooling air systems of different technical components in locomotives and carriages are being developed and produced based on years of experience in close coordination with the customer. Our customers are almost all big manufactures of rolling stock like Alstom, Siemens, Bombardier, Stadler, Talgo etc. Professional design and competent support by our engineers, starting from the first consultation until the fast provision of 3D models and samples, makes the integration of the components in the railway vehicles easy for our customers. Pressure protection systems are a very important issue for high-speed trains. Krapf & Lex constructs, based on several tested modules, reliable and low-maintenance solutions, which reliably prevent the occurrence of pressure differences in the inside of the vehicle. read more