Water valve for food
I would suggest, instead of a valve, a Peristaltic Pump.

In short, it comprises a set of rollers that squeeze a flexible tube and push the fluid along. It has good advantages for food use:


Very easy to clean - only the inside of the tube needs cleaning
Pumped fluid is not in physical contact with the pump mechanism so can't be contaminated.


They are used in many sterile environments - medical, industrial, etc., because they are so easy to keep clean and have no way of contaminating the pumped fluid. They are also good with viscous (sticky, gloopy) fluids like soups and sauces.

They can also deliver precisely measured amounts very easily.