unidirectional /bidirectional seal knife gate valve for papermaking/ sewage/powerplant

QB  Series  Knife  gate  valve  is  with  replaceable  rubber  seal  knife  gate  structure,  its  sealing  principle  is  mainly by closely connection between gate and rubber seals. Its main characters is that the rubber sealing ring is set in seat’groove and is locked by metal seat, which will prevent rubber seal off when opening and closing the valve. If the seal is broken, you can remove the metal sear and replace the rubber seal, which  will  greatly  improve  valve’  working  efficiency.  This  valve  is  a  cost-effective,  high-performance  products. The series of knife gate valve can be equipped with pneumatic actuators, in order to meet the requirements of different industrial and mining use.