K-LO High-Performance Rotary Control Valves

About this product

K-LO rotary control valves have been especially designed to meet the usual cavitation problems of processes when hot liquids and not negligible pressure drops facilitate the development of cavitation. These special valves are deriving from the double eccentric DYNA-LOK series by modifying the basic disc design with particular baffles, integral or welded-in on both the disc sides, which increase the recovery factor of valve as well as its cavitation index grows. These baffles are wing-shaped and machined with many rectangular windows providing a moderate pressure drop so to not greatly affect the Cv of the valve with the plain disc. The distribution of the windows takes into account the presence of the sealing ring fitted into the body, with particular care to the area close to the shaft axis. Due to particular disc baffled design, max valve openings greater than the usual 90° are allowed to achieve higher Cv values. As for DYNA-LOK valves, the off-set design reduces the torque tending to close the valve. In addition, the cam effect caused by second shaft eccentricity improves the seal ring life. Technical characteristics: Cavitation and noise control Multi windows wings These special trim executions are machined, depending on wings size, from a solid cast or forged block. The design of K-LO disc is very effective against potential cavitating conditions due to its high XFz values, which are close to 0,4 at 70° opening approximately for all the dimensions. This allows to avoid cavitation under critical conditions, such as, for example: p1 = 15 bar, p2 = 10 bar and max vapour pressure = 2,5 bar (water at 125℃). Flow coefficients are slightly affected by the anti-cavitation large windows of the wings, while allowed disc opening is limited to the region where recovery factor is higher. Drilled wings Special drilled wings allow K-LO control valve to reduce noise. This peculiar trim pattern combines high efficiency in reducing noise with an excellent modulating performance. Low-noise disc design Anti-cavitation disc design