The Emerson regulator suite offers innovation in design and durability in even the world’s harshest environments. From Fisher and Tartarini direct- and pilot-operated regulators to TESCOM high-pressure control regulators, Emerson offers the industry’s broadest portfolio of pressure control technologies, enabling reliable solutions.Pressure reducing regulators, also known as pressure reducing valves, are mechanical devices that allow automatic pressure control without an external power source.Pressure reducing regulators reduce a high, often variable upstream pressure to a lower, more constant outlet pressure, despite varying flow demands from the equipment it is supplying. To meet this demand, the pressure reducing regulator valve throttles, allowing more flow when demand increases and shutting off flow when demand decreases.