Pressure Reducing Valve :
A pressure reducing valve (PRV), also known as a pressure regulator or pressure control valve, is a device used to reduce and control the pressure of a fluid or gas in a pipeline. The primary purpose of a pressure reducing valve is to maintain a constant and lower downstream pressure, regardless of fluctuations in the upstream pressure. These valves find applications in various industries where precise pressure control is essential.
Here are the key features and functions of a pressure reducing valve:
Inlet and Outlet Ports: The pressure reducing valve has two main ports - the inlet and the outlet. The higher pressure fluid enters through the inlet, and the reduced pressure fluid exits through the outlet.
Adjustable Setpoint: Pressure reducing valves typically have an adjustable setpoint, allowing operators to set the desired downstream pressure. This setpoint is the pressure at which the valve maintains the downstream flow.
Valve Mechanism: The valve mechanism inside the pressure reducing valve responds to changes in upstream pressure. It modulates the valve opening to maintain a relatively constant pressure downstream.
External Adjustment Device: To set the desired pressure, pressure reducing valves often have an external adjustment device. This can be a handwheel, screw, or another mechanism that allows operators to change the setpoint manually.
Pilot System: In some advanced pressure reducing valves, a pilot system may be used for more precise control. The pilot system senses the downstream pressure and sends signals to the main valve to adjust accordingly.
Pressure reducing valves are widely used in water distribution systems, industrial processes, and various applications where maintaining a constant and controlled downstream pressure is critical. They help protect downstream equipment and systems from damage caused by excessive pressure and ensure that processes operate within specified pressure ranges.
