... slag, coal slurry, pulp, sewage of solid, liquid-solid ,gas-solid two-phase medium conveying system in the pipeline switching ... prevent the comdeposition of slag,dust and jam.3, single seat, one-way sealing with pressure ... it not easy to block ash and deposition. 3, The valve is sealed with high quality ceramic ... SS316/ 316L /WCB / LCB / WC9 and so on.3. Stem: 304/ 316/ Cr13% and so on4. Sealing face ...