Full definition
Belt with special compound covers to resist degradation by aggressive chemicals: butyl rubber (IIR) for mineral acids, EPDM for oxidants and ozone, nitrile rubber (NBR) for aliphatic hydrocarbons, Viton (FKM) for aromatic solvents and extreme temperatures. Chemical resistance evaluated per ISO 1817 (media immersion). Correct identification of the chemical agent, concentration, and operating temperature is critical; no single rubber compound resists all chemical families.