The Fibre Reinforced Plastic Damper Valves are located in duct line to control gas flows. Motive Powers Inc. Supplies Fibre Reinforced Plastic Damper Valves. Motive Powers Inc. Manufactures Multi Tower Scrubber, Centrifugal Fans & Blowers, Fume Extraction Systems, Hoods, Fabricated Fans, Cast Fans, Cyclones, Rotary Dryers, Dynamic Scrubber, Catalytic Scrubber, etc. The Damper Valves are all PP or All FRP, suitable for manual control or auto drive. The available sizes in short notice are 200,250,300 mm diameter. Bigger one is offered on request.