What is true regarding grid type extraction valves?

Grid type extraction valves are designed to control the flow of fluids using a unique structure that features a ported stationary disc along with a rotating grid. This combination allows for precise modulation of flow rates and pressures within a system, enhancing the valve's efficiency and performance.

The stationary disc is designed with ports that allow flow to pass through, while the rotating grid modifies this flow by either obstructing or directing it, depending on its orientation. This dual mechanism provides flexibility in control compared to a simple one-piece valve system. The integration of a rotating element with a fixed component is crucial for applications requiring variable flow conditions, making grid type extraction valves particularly useful in a variety of industrial processes.

Other options, in contrast, lack the importance of this specific design. The description of a single ported stationary disc oversimplifies the operation and capability of grid type extraction valves. The notion that they are purely electronic ignores the mechanical nature of their construction and operation, while suggesting they only connect to high-pressure systems is misleading, as these valves can be effective in a range of pressure conditions, not limited to just high-pressure applications.