What is the function of a Pressure Reducing Valve?

A Pressure Reducing Valve (PRV) plays a crucial role in managing the pressure of a gas or fluid system. Its primary function is to lower the pressure from the source, such as a city main, down to a much safer and suitable operating pressure for appliances and equipment connected to the system. This reduction in pressure ensures that the gas delivered to the end-users is maintained at a level that is safe for operation, preventing potential hazards that could arise from excessively high pressure.

By maintaining the correct pressure, the PRV helps protect equipment, reduce the risk of leaks or failures, and improve overall system efficiency. It also helps in ensuring that the appliances function correctly and safely, providing both performance and safety for users.

The other options don't align with the primary purpose of a PRV. For instance, eliminating air or increasing water flow is not a function of this device; it is mainly focused on managing pressure levels. Regulating temperature is typically the function of thermostatic controls or temperature regulators, rather than a pressure reducing device. Therefore, the decisive function of a PRV is to reduce the city main pressure to a safe working pressure.