The pressure at which a check valve will start to open is known as?

The pressure at which a check valve begins to open is referred to as cracking pressure. This term specifically defines the minimum pressure that needs to be present on the inlet side of the valve for it to start allowing fluid to pass through. It is important in the context of the valve's operation because it affects how the valve responds to changes in system pressure. Cracking pressure is a critical parameter for ensuring the effective performance of a check valve, as it influences flow dynamics in a pipeline system.

Understanding this term is essential for millwrights and engineers when designing and maintaining systems that utilize check valves, as it ensures proper fluid flow management and helps prevent backflow in various applications. Pressure rating and seating pressure are terms related to the overall specifications and performance of valves but do not specifically describe the initial opening point of a check valve like cracking pressure does.