the standard SEB pressure cooker that every household owns in France constantly vents when under pressure - there's a kind of spinning valve on the top that mak

the standard SEB pressure cooker that every household owns in France constantly vents when under pressure - there's a kind of spinning valve on the top that make a choo-choo train noise :) usually you turn the hob to full until it starts spinning, then you reduce to low for the duration of the cooking