How should a steam trap be installed on a kettle?

Installing a steam trap on the outlet of the kettle with a condensate keg is the correct approach to ensure efficient drainage of condensate while allowing steam to pass through uninterrupted. This placement allows the steam trap to reliably collect condensate that accumulates at the lowest point of the system, effectively preventing any water from remaining in the kettle that could affect cooking or steaming efficiency. The use of a condensate keg provides a dedicated space for the condensate to accumulate before being discharged, which can improve the performance of the steaming process and minimize the risk of water hammer or other issues associated with improper condensate handling.

Other placement options, such as installing on the inlet of the kettle, would not effectively manage the condensate since any trapped water would remain in the kettle, negatively impacting operation. Similarly, placing the steam trap above the kettle could lead to incorrect gravitational drainage, as condensate would not flow towards the trap effectively. Installing at the highest point of the steam line is similarly problematic, as it would not serve the purpose of efficiently removing condensate that has formed within the system.