The LRD rotary disc valve suits applications that involve abrasive or corrosive slurries, powders or coarse substances. It finds the users in mining and metal industries, mineral processing, power generation, sand and gravel, chemical & pulp and paper industriesor in water and wastewater treatment. The design allows the valve to cycle in heavy scaling slurries without sticking or leaking and with minimum wear. It is available with pressure ratings up to 100 bar. The valve is designed for leak tight shut off slurries and liquids within a pipeline, to be operated only in the fully open or fully closed position. As the actuator is opened or closed, the disc is allowed to rotate. The wedge gate support has a cutaway behind the disc clearing debris away and thus, ensuring the disc closes and seals every time. The body and bonnet are made of cast steel and can be made out of different materials. The bonnet houses the rotating disc when open and seals around the spindle. The valves are produced with manual, manual gear, pneumatic, hydraulic and electromechanical actuators.