TechnequipTM Extra High Pressure TGHP Series Knife Gate Valve:

Heavy duty, wide body, slurry knife gate valve are designed specifically for highly abrasive applications. 

The extra high pressure valve is bi-directional with a full port design. The valve body shall be designed such that the gate passes between two inserted massive elastomer sleeves so that the gate expels slurry solids in the path of the gate through an opening in the bottom of the valve.