Which component is NOT part of "valve trim"?

The body of a valve is not considered part of the "valve trim." Valve trim typically includes the components that come into direct contact with the flow, which governs the valve’s function. This includes items like the disc, seat ring, and valve stem; these parts work together to control the flow of the fluid through the valve.

The body of the valve, on the other hand, serves as the main structure that houses the trim and provides the connection points for installation in the piping system. It is designed to withstand pressure and contain the flow. Therefore, it is classified separately and does not fall under the definition of valve trim, which focuses on the internal mechanisms that affect the flow control. Understanding this distinction is vital for maintenance and replacement considerations in any refrigeration system.