CAVCONTROL VALTEK ANTI-CAVITATION VALVE TRIM

CavControl trim is a cost-effective trim that effectively minimizes cavitation damage to valve components by controlling the location and concentration of cavitation vapor bubble implosion in an area away from metal parts.

CavControl trim utilizes a number of small, diametrically opposed flow holes through the walls of a special seat retainer. As the valve plug lifts off the seat, increasing pairs of holes are opened. Each hole emits a jet of cavitating liquid, which impinges in the center of the retainer upon the jet of liquid emitted through the opposing hole. The impinging fluid jets form a fluid cushion and an area of pressure recovery that cause the collapse of the vapor bubbles in the fluid stream away from metal parts. Stepped holes are used to ensure orifice type flow rather than tube type flow through the retainer; thus, the vena contracta is established externally rather than inside the retainer itself. The turbulence of the impinging flow promotes the collapse of vapor bubbles at the center of the seat retainer, minimizing damage to valve trim. CavControl trim fits standard Valtek bodies, with both pressure-balanced and unbalanced trims available.

As with all Valtek control valves, CavControl is designed to allow for easy maintenance, reliability, performance and high interchangeability of parts with other valve models. Designs are simple, straightforward and require no special tools.

Features

• Controls Cavitation Damage
• Isolates Cavitation Bubbles Away from Metal