We are looking for a small (3×2"max)3-way valve that would allow us to manually switch a vacuum source from one inlet to another. Ideally it would be spring loaded so we could normally operate off of ports 1 & 2 then when a button is depressed"
Any small 3-way spool type valve, single pilot operated, spring return would work for your application. Use a 3-way Palm Button air valve to pilot it for a simple setup.Realize the flow of an air valve using vacuum will be much lower than advertis
What type of flow requirement do you have? Do you want a manual valve, or solenoid operated? Parker has an extensive vacuum line, as well as valves and air preparation.www.parker.com/pneumatic