Due to the double offset movement, the rotation of the disc is eccentric over the seat. The rotational circular movement of the disc turns into an elliptical movement. So, the disc achieves just a few degrees contact with the seat before the valve is fully closed. The Colossus is a high performance grade butterfly valve with superior performance characteristics that makes it ideal for use in demanding environments where most other butterfly valves would not survive and has been designed for use with both gasses and liquids. With the Hytork Pneumatic Actuator you get a reliable unit that has been tested extensively on thousands of installations worldwide. Our actuators offer an adjustable stroke length with no additional parts required. Simply adjust the travel stops as needed.
