Due to the in-line design inherent with characterized control ball valves, line media flows linearly through the piping system. The direct pattern provides increased media control and rapid response times to controller commands.
Flow-Tek’s characterized balls provide predictable and accurate control of downstream flow rates. These precision cut balls match the control performance of globe valves while offering the economy, features and reduced size and weight of ball valves. Flow-Tek offers a wide range of V-Port and Slotted Port characterized balls. The standard characterized balls and an example of a custom ball are shown above. The 90° and 60° balls, like standard round hole balls, offer an equal percentage inherent flow characteristic. A slotted ball and a V-Port ball with a small angle opening, such as a 15° ball, furnish a linear inherent flow characteristic. medium angle V-Port valves such as a 30° ball furnish a modified equal percentage inherent flow characteristic. Custom ports are also available to meet special control requirements. Designed with flexibility in process conditions in mind, the Cv and control characteristics are easily changed by simply changing the ball.
The characterized ball delivers controllable flow characteristics from the nearly closed to the fully open position of the valve. Though port type and valve size affects the rangeability, Flow-Tek characterized balls have a minimum rangeability of 200:1 and can exceed 800:1. Flow rates are highly repeatable within the normal 20% – 80% range of travel.
Flow-Tek’s control ball valves have been designed to offer maximum flow characteristics that are substantially higher than comparably sized globe valves. The inherent flow pattern of ball valves increases flow rates and in many applications valves smaller than pipeline size can be used. The self-cleaning action of the ball against the seat makes the ball valve acceptable for slurry and high fiber media services.
Engineered to withstand high pressure drops while providing leak free operation, the V-Control Series delivers the precision control required by today’s process industries. The δP limit for liquids is up to 500psi and steam is up to 300psi. Please consult the factory or your distributor for information on control valve sizing and pressure drop limitations.
V-Control Series ball valves offer bi-directional bubble-tight Class VI shutoff in compliance with FCI 70-2 standards.
