The quarter turn action offers quick opening or closing with ease of operation and the valve has good flow control characteristics. In the wide open position, the only obstruction to flow is that due to the thickness of the disk, so the pressure drop across the valve is small. Actuation Valve & Control is a world-class manufacturer of actuated butterfly valves, with in house engineering and testing. We offer Direct Mounted Assemblies as well custom build bracket/shaft arrangements to ensure any application can be met.