Piston Seals PISTON SEALS Piston seals have the function of sealing the piston against the cylinder tube to ensure a pressure buildup in the piston chamber. Here the sealing material and the profile of the piston seal must be selected on the basis of the application and the conditions of use. SEALING MATERIALS NBR (Acrylonitrile butadiene rubber) Due to their good mechanical properties and their resistance to lubricating oils and greases based on mineral oils, seals made of NBR are suited to a broad range of hydraulic applications. TPU (Thermoplastic polyurethane) TPU stands out for its mechanical strength and resistance to ozone and aging. TPU is only hydrolysis-resistant up to 50°C. PTFE (Polytetrafluoroethylene) PTFE has very good slide characteristics and can be used in a wide range of temperatures. In addition, PTFE exhibits nearly unlimited resistance to chemicals, ozone and aging. Fillers such as bronze, graphite and coal influence the characteristics of the material in line with the requirements. MEDIA RESISTANCE Nitrile butadiene rubber (NBR), thermoplastic polyurethane (TPU) and polytetrafluoroethylene (PTFE) are resistant to • Hydraulic oils in accordance with DIN 51524 Part 1 - 3 • Lubricating oils and greases based on mineral oil • Fire-resistant hydraulic fluids: HFA, HFB, HFC in accordance with VDMA 24317 APPLICATIONS Due to the wide range of piston-seal geometries, these products can be used in diverse ways, such as in • Agricultural machinery • Construction machinery • Truck-loading cranes • Injection-molding machines • Handling devices • Industrial trucks • Standard cylinders • Presses • Switch valves • and many more DIMENSIONS The currently available dimensions can be found on our website dichtomatik.fst.com or on our online ordering platform EASY. FREUDENBERC INNOVATING TOGETHER

Axial Seals #■ m F Note: The values indicated here are maximum values. All of them must not be achieved simultaneously. The information contained herein is considered to be reliable, but no assurances, warrants or guarantees whatsoever, of any kind, are provided with regard to their correctness or suitability for any purpose. The information reproduced herein is based on the current state of the technology and is not necessarily indicative of the performance of the end product. Complete testing and the performance of the end product are the user's responsibility. www.fst.com | dichtomatik.fst.com...