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 ... pulp, sewage of solid, liquid-solid, andgas-solid two-phase medium conveying system in the pipeline for switching valves ... SP61,API598,ISO5208Type Of OperationGear,Electric,Pneumatic,Manual-Air-HydraulicDN(NPS)2"~24"PN(LB)Class 150LB~ ...