Stainless steel ball valves with PTFE (Teflon) seats & seals offer excellent corrosion resistance for most applications. Stainless steel & PTFE work well in applications including but not limited to water, oil, gas/air, light alkali's and acids, biodiesel, fuels and alcohols. These ball valves are fitted with tight seals to ensure no leakage and a long lasting seal after many years of frequent usage.