... and 2.high temperture resistant, 3.clean dirty on gate or seal surface 4.api ce,iso ... pulp, sewage of solid, liquid-solid ,gas-solid two-phase medium conveying system in the pipeline switching valves,such ... of slag,dust and jam.3, single seat, one-way sealing with pressure.ZHONGCHENG'S special advantages:1, It ... / 304L/ SS316/ 316L /WCB / LCB / WC9 and so on.3. Stem: 304/ 316/ Cr13% and so on4. Sealing ...