ArneDunio:
So if anyone knows a similar project please help me out.
Your project is not complicated, but you should try by yourself beginning, for instance, with just one relay and one press button (without delay), that seems to be one of the simplest projects you may afford. Then add delay and, then, add buttons and relays. Publish your attempts and everybody will help you.
(Even if your filling machine would not cause any harm, the emergency circuit should be cabled outside the arduino).
Regards