Some hot water radiator systems use wax actuated valves made from brass (Taco brand is common). They are extremely simple and robust.
replythank you for the pointer!
replyI've struggled to protect eletronics. Waterproof enclosures all fail over time. Though I have some ideas for immersion in mineral oil. But finding actuators that could work has been a bit of a struggle. These look cool, though maybe not something one could run off 5V :) Ill keep looking around
This is why wax motors are used for washing machine door locks.
replyhow does it work for a door lock?it seem it works pretty slowly.
replyMayne you know, are the internal components already designed with corrosion in mind?