When a relief valve is opened due to high pressure, where is the liquid returned?

A relief valve is used in systems to handle pressure fluctuations by releasing excess pressure. When the relief valve opens due to high pressure, it allows the liquid to bypass the usual flow path and return to the suction side of the system. This action reduces the pressure by allowing the fluid to go back to the area where it can be drawn into the pump again, maintaining system safety and stability.

Returning to the suction side helps to ensure that the system can continue to operate effectively without over-pressurization. This design is crucial for preventing potential damage to equipment and maintaining operational efficiency. The valve's mechanism is a part of safety systems to protect against pressure buildup and to ensure the longevity of machinery.