How is the control in a direct operated regulator characterized?

A direct operated regulator is characterized by its ability to control pressure through the direct interaction of the diaphragm with the regulating mechanism. In this type of regulator, the diaphragm responds quickly to changes in downstream pressure, allowing for immediate adjustments. However, compared to other types of regulators that may utilize feedback or electronic control systems, direct operated regulators tend to offer a degree of control that can be less precise, thus demonstrating poor sensitivity.

Sensitivity in this context refers to the regulator's ability to maintain the desired output pressure in response to variations in input pressure or flow conditions. While direct operated regulators are straightforward in design, their lack of intricate feedback or compensatory mechanisms means they may struggle to adjust finely under rapidly changing conditions, hence the characterization of poor sensitivity.

An understanding of the operational principles of direct operated regulators provides a clear rationale for why such devices are not always ideal for applications requiring precise pressure control.