What is the role of a vent valve in a pumping system?

A vent valve plays a crucial role in a pumping system by allowing air to escape, which helps prevent vapor lock. Vapor lock occurs when air or gas becomes trapped in the pump or the system, impeding the flow of liquid and potentially causing operational failures. When the vent valve is properly functioning, it ensures that any entrained air or gases can be expelled, keeping the system filled with fluid and allowing for efficient pumping.

By maintaining the correct pressure and preventing air entrapment, the vent valve ensures smooth operation and helps to maintain the efficiency of the pump. This function is vital for the longevity of the pumping equipment and the overall performance of the system.