A Pressure Reducing Valve (PRV), also known as a Pressure Regulator Valve or Pressure Control Valve, is a mechanical device used to control and regulate the pressure of fluids (liquids or gases) within a system. Its primary purpose is to reduce and maintain the pressure at a desired and safe level downstream, even when the inlet pressure fluctuates. https://www.growmechanical.com/pressure-reducing-valve-types-applications-and-benefits-pdf/