... large CV. Applicable to metallurgy and glass industries because of its block-proof and high-temperature-endurable characteristics. SpecificationDN ... -4000mm (6"- 80") PNANSI 125,JIS10K, PN0.6MPaMaterial of parts BodyWCB,CF8,CF8MDiscWCB,CF8,CF8MStem310S,304,316N6LPackingPTFE, graphiteSealing ringCGM,316LFluid ... ability20:1LeakageRated Cv×0.1% to 5.0% hot sale of Carbon Steel Butterfly Valve