Help finding proportional valves, gas/liquid, operated with PWM

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Franck C

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Hello!

I am working on the design of a machine for which I need to control gas and liquid flows.

For this I need proportional valves that can be operated with PWM. As I am newcomer in the field of electronics (and "building things"), I would be grateful if I could get some help on this. I found a few valves meeting my criteria (and budget), but all of them were designed for large flow rates and had connected ends which were too big. I'm looking for something to which about 5 mm-diameter tubes can be connected, and a flow rate that does not need to be huge but above 5 L/mn. Would you have any model recommendation?

Thank you in advance for your help, it will be much appreciated!

Franck
 
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