QWL Series Self-sealing knife gate valve, which using one-piece valve body design, the Rubber sleeve seats on both sides of the body protecting flange surface to increase valve service life. When the knife is fully open and fully closed, the two seat seals combined together tightly, the pipeline pressure will make sealing better, so the medium will not stay and stuck in the valve cavity. The valve body has flushing holes and a cleaning port to clean the fluid trapped in the valve cavity.
