A stainless steel sanitary plug valve is a rotating valve with a cylindrical or cone-shaped plug, used to start, stop, or regulate flow. Made from clean, safe stainless steel, these valves are crucial in food, drink, medicine, chemical, and water industries for keeping processes sterile and preventing contamination. The main parts of these valves include the body, actuator, disc or plug, stem, seat, seals, gaskets, connections, and bonnet. They're built for easy cleaning without hidden spots for bacteria, and metal valves like these are better for high heat and pressure than plastic ones.