Capping Machine Cap Loaders specification should start with the real closure.
The cap loader and the capping machine have to work as one system. Discharge angle, chute back pressure, cap request signals and operator access can all affect uptime. A cap loader should be selected around the capper, not treated as a separate accessory.
For a better buying decision, the useful comparison is not only hopper size or headline speed. It is how the feeder behaves with your closure, how the capper receives the cap and how easy the line is to run after changeover.
The safest specification route is to start with real closures, target output, line photos and the exact point where the cap must be presented. That avoids choosing a feeder on a generic speed figure that does not match the cap or capper.