Taper Flo 8" IST20 Rotary Valve Cast Ductile Iron Valve Flo Body USA MADE NEW $3999 a little dusty. TECHNICAL SPECS CAN BE FOUND HERE. https://kochek.com/wp-content/uploads/2023/08/TaperFlo_11_08_2013.pdf Tapered-plug rotary valves, often called Taper-Flo valves, are used to control the flow of fluids or gases. They utilize a tapered plug that rotates to open or close the flow path. They are commonly found in applications demanding precise flow control, quick response times, and high flow rates. Product Description: Rotary valves, like any other component in a conveying, storage, or environmental control system, must be tailored to each individual application in order to ensure the best possible results. Our TaperFlo IST (tapered bore) series is more than capable of meeting the demands of high pressure, high temperature, and highly corrosive or abrasive operating conditions. Our valve is manufactured in the US and constructed of durable, long-life ductile iron. The TaperFlo body bore and corresponding rotor are engineered to offer the unique ability to easily adjust the valve?s rotor-to-housing radial clearance, which significantly reduces the negative effects of differential pressure and guarantees maximum product throughput. Drilled and tapped seal and end cover purge ports, and body vent are standard, but can be plugged if not required. Each of our TaperFlo rotary valve designs are available in standard ductile iron sizes 6? ? 16?. Optional Tungsten Carbide coating is available for exceptional abrasion resistance, along with a variety of rotor materials to suit your specific application. .