I'm planning on expanding a phase change system to have a second and eventually third evap. I need a way to direct refrigerant (r404) to the various thermal heads on a duty cycle depending on each head's heat load and set temp. I'm thinking that the best way to do this is with solenoids and a cap tube manifold. A three-way solenoid would work for a dual head system. I'd like to keep it quiet if possible as the solenoids would be on a 10 second or less duty cycle. Would a servo be better? Can anyone recommend a solenoid, i've seen that LEDEX has some that are supposed to be quiet but I don't know if they would work with 404.

Any help is appreciated.