What is another name for direct operated pneumatic regulators?

Direct operated pneumatic regulators are commonly referred to as self-operated regulators. This name stems from their design and functional mechanism, which allows them to automatically regulate pressure without the need for external control signals or systems. These regulators use a simple diaphragm mechanism that responds directly to changes in downstream pressure, making them efficient and reliable for maintaining the desired pressure level in a system.

The term "self-operated" emphasizes the regulator's ability to maintain stable pressure autonomously. When the downstream pressure drops below a set point, the regulator adjusts the flow of supply air to compensate, thereby keeping the output pressure consistent.

This self-regulatory feature distinguishes them from other types of regulators that may require an external control signal or intervention to manage pressure levels. The other terms provided do not accurately describe the primary characteristic of direct operated pneumatic regulators. For instance, "automatic" is broader and may not specifically relate to the self-sustaining nature of these devices; "pressure-controlled" indicates more of a regulatory function but does not highlight the self-operating aspect; and "overflow" does not apply to the function of regulative pressure, as it describes a different scenario altogether.