Resilient renewable Seated,two-way sealing ,zero leakage,long lifetime,heat-resistant, ... of slag and jam.3, single seat, one-way sealing.4.the valve plate design is flat with ... realize the seal face seal mainly under high pressure end ressure promote 7. the valves are suitable for ... pulp, sewage of solid, liquid-solid, andgas-solid two-phase medium conveying system in the pipeline for switching valves ...