Which component helps to keep a check valve operational?

The component that helps to keep a check valve operational is the spring. In many types of check valves, specifically spring-loaded check valves, the spring plays a crucial role in ensuring that the valve functions correctly. The spring provides the necessary force to keep the valve closed when there is no flow or when the flow direction reverses, thus preventing backflow.

When the fluid flows in the intended direction, it will push against the valve element, overcoming the resistance of the spring and allowing the valve to open. Once the flow decreases or stops, the spring returns the valve to its closed position, effectively sealing off the backflow path. This mechanical operation is vital for maintaining one-way flow in plumbing systems, thus ensuring the safety and integrity of potable water supplies.

Other components like floats, diaphragms, and valve seats contribute to valve functionality but do not specifically operate in the same manner as springs do in maintaining the operational status of check valves in preventing backflow.