I am designing a device that requires a gas (air) valve that takes the same volume of gas from two different input ports IP1 and IP2.
The output port OP will have lower pressure than both of the inputs, however, the pressures at the inputs are not not guaranteed to be constant and the same.
What is the simplest design that can guarantee that roughly the same volume of gas is been taken from both inputs despite the pressure fluctuations?
Additional criteria, the valve must not use any electronics or external power. It has to be a purely mechanical design.
Follow up questions:
- Can this be designed without using moving parts?
- Can we modify the design such that the gas volume taken from IP1 and IP2 is a different fixed ration e.g. 1:3
- How would you design it different if you were to guarantee that gas taken from IP1 is at least 1/3 of the total volume in the output?