regulator

A regulator is a device or set of devices that controls and maintains a specific parameter—such as pressure, voltage, or flow—within a desired range. Its primary purpose is to ensure consistent and safe operation of equipment by automatically adjusting to changes in input or output conditions. For example, a gas regulator reduces high-pressure gas from a tank to a lower, usable pressure for appliances. Regulators are essential in many systems—from plumbing and gas supply to electrical circuits—helping to prevent damage, improve efficiency, and maintain safety.