The gate is encapsulated in the housing and does not pull clear out of the housing like conventional knife gate valves. Only a piston rod is run through the housing and sealed using a proven tight fitting. The hydraulically actuated knife gate valves are specially designed for substrates with a high proportion of liquid. Wearing parts such as the housing halves, passage ring, gate, etc. can easily be replaced, which is a significant difference compared to conventional knife gate valves.