Rotary Valve Design for

The Control-Disk valve offers high throttling performance and suits applications that involve fast processes and varying pressure drops, such as in the hydrocarbon, refining, chemical, pulp and paper, and metals and mining industries. The valve’s wide control range is twice that of traditional butterfly valves for better adherence to set point. This improved capability allows control closer to the target set point, regardless of process disturbances, which results in a reduction in process variability. With a contoured edge on one side, the patented disk creates a flow clearance to give the Control-Disk valve an inherent equal percentage characteristic. Computational fluid dynamics (CFD), verified by flow testing, show the Control-Disk valve’s ability to reduce dynamic torque. The Control-Disk’s equal percentage flow characteristic provides an improved throttling range that allows control in the 15 to 70 percent valve travel range. It replaces poor performing butterfly valves that typically have a narrow 30 to 50 percent valve travel range. With its improved capability, the valve allows to control closer to the ideal set point with less chance of set point overshoot, so quality on spec and output on target can be kept. The valve is reliable and has low maintenance requirements for high plant availability, especially when it is paired with a Fisher spring-and-diaphragm actuator and digital valve controller. This assembly can capture and deliver diagnostic data to AMS ValveLink software, providing an accurate picture of valve, actuator, and digital valve controller performance. This makes it a core component of PlantWeb digital plant architecture. As a direct replacement valve, existing piping can be used. The valve meets API, ASME and EN standards, making it suitable for use in all world areas. The valve body meets PN 10 through PN 40, CL150, and CL300 ratings. Face-to-face and raised-face dimensions meet EN 593, API 609, and MSS-SP68 standards. Line centring clips provide for versatility to mount and align the same wafer style valve body in different piping configurations (ASME and EN ratings).