The statement "The composition disc valve is most suitable for throttling purposes" is what?

The statement regarding the composition disc valve's suitability for throttling purposes is considered false. This type of valve is designed primarily for on-off control rather than precise flow regulation. While it can be used for throttling in certain situations, its design and function are not optimized for this purpose.

Throttling applications typically require valves that can finely control flow rates, such as globe valves or control valves, which provide better performance in these situations. A composition disc valve, with its structure, can lead to flow turbulence and pressure drops that are not ideal for accurate throttling. Thus, labeling the statement as false accurately reflects the valve's application and limitations regarding flow control.