Flow regulators, also known as throttles, are devices used to control the rate of flow of a fluid or gas. They are commonly used in industrial and commercial applications to regulate the flow of liquids and gases, such as water, air, steam, and fuel. Throttles can be used to adjust the pressure, temperature, and flow rate of a system, allowing for greater control over the process. They are also used to reduce the risk of over-pressurization and to maintain a steady flow rate.