The GAIRUI Through Conduit Knife Gate Valves can be made of hard and soft sealing structure according to the needs of the customer. The penetrating knife gate valve has the characteristics of precision structure, good craft and compact structure. The sealing valve seat is designed for the active structure, and has the function of anti wear and automatic compensation, thus the life is longer. During the closing and opening process, the valve seat and the ram are always moving closely, so that the valve opening and closing force is stable and has the characteristics of cutting off the medium.