VALUTION

Floating Ball Control Valve

Valution model FB Series is a traditional concentric floating type ball valve.
The center of the body/seat and the center of the valve plug/stem are concentric, so when the valve stem rotates, the ball surface and the seat surface rotate in contact, so that it is not modulating for fine and precision control, it is a ball control valve used primarily for blocking on-off.

It is a control valve that has simple internal flow paths in the concentric ball trim structure, so it can have good effects not only in clean fluid conditions but also in highly corrosive slurry services.
However, without the support of the bottom part of the ball, through the grooves at the top of the concentric ball, by the power of the upper stem, as the floating type in which the ball rotates without full alignment, it is recommended to use it in a relatively small sizes and low pressure range.

Depending on the characteristics of the complete round ball, the flow characteristics are basically quick open properties as standard, and modulating control by the positioner can be step motion, so it is better to avoid as much as possible. According to the required seat tightness, it is also possible to apply metal or soft seat and to support the fulfillment of the leakage class VI, V, and VI.The body has a straight shape structure, which has low fluid resistance and enough space around the trim.

This model can apply usally rack & pinnion cylinder, scotch yoke cylinder and electric motor type actuators.
It mainly performs on-off functions with traditional SOV and Lim. S/Ws.