Abstract: A multi-seal knife gate valve includes: a valve body coupled to a pipe; a disk inserted into the valve body to move vertically; and a valve seat pressed against the disk so as to maintain a tight seal, wherein the disk installed in the valve body moves vertically to open or close a passage through which fluid flows, and the valve seat is pressed against the disk and includes at least one metal seat and one rubber seat to maintain a seal.

Abstract: In order to compensate for the drawbacks of metal sheet-type knife gate valves having excellent durability but poor sealing capability, and of rubber sheet-type knife gate valves having good sealing capability but poor durability, and to retain the strengths of the two valve types, the present invention provides a multi-seal-type knife gate valve having good sealing capability and excellent durability. The multi-seal knife gate valve of this invention includes: a valve body coupled to a pipe; a disk inserted into the valve body to move vertically; and a valve sheet pressed against the disk so as to maintain a tight seal, wherein the disk installed in the valve body moves vertically to open or close a passage through which fluid flows, and the valve sheet is pressed against the disk and includes at least one metal sheet and one rubber sheet to maintain a seal.