Materials for hydraulic seals include nitrile rubber (NBR), fluorocarbon (Viton), polyurethane (PU), and polytetrafluoroethylene (PTFE). NBR offers good oil resistance and affordability, suitable for general applications. Viton excels in high-temperature and chemical environments. PU provides excellent wear resistance and toughness. PTFE is ideal for low friction and extreme condition... https://globalsealstech.com/hydraulic-seals/