Control valve package
The control valve package and the way it is built are the first crucial factors to consider. The control valve package consists of a valve, an actuator and a positioner. Ideally, all these components should come from the same manufacturer to guarantee that the package is designed and tested to work well. If a multivendor package is selected, the one who takes the lead responsibility for the overall performance should be carefully considered – which is not a minor matter for the final control element.
Valve material selection
When it comes to the centerpiece of the control valve package – the valve – its material should be selected based on the specific application needs. The trim type matters most for efficient control. In a modern control valve, there are typically tens of different types of trims from which to choose. They vary from normal trims to multi-hole Tendril-type trims (below the illustration on the left) – and all the way to multi-channel Omega-type trims (below the illustration on the right) that are used in the most demanding applications.