... GB/T4213-2008, API598Product introductionHB2416 pneumatic piston 3-eccentric butterfly control(shut-off) valve is independently developed by our ... effect to realize theno-friction contact between seat and sealing ring of disc during the 90° travel of valve, ... CF8,CF8M,316L DiscWCB,CF8,CF8MStem310S,304,316LPackingPTFE, graphite Sealing ring CGM,316LFluid temperatureHigh temp. 1-20 ~ +180°cHigh temp ...