What does the valve stem connect in a valve assembly?

The valve stem plays a crucial role in the operation of a valve assembly. It connects the operating mechanism, such as a handwheel or actuator, to the valve disc. When you turn the handwheel, the movement is transmitted through the valve stem, causing the disc to move and either open or close the valve. This connection allows for the control of fluid flow through the valve, which is essential for regulating processes in various applications, such as heating systems, water supply, and industrial operations.

Understanding this connection helps highlight the importance of the valve stem in ensuring that the valve operates smoothly and efficiently, transferring motion from the user or actuator directly to the valve's closing or opening element, the disc. Each of the incorrect options relates to other components, but they do not accurately describe the specific function of the valve stem within the valve assembly.