Valve problem

[Gersh91]

Hello everyone, I need to solve the problem in the attached image. I nkow it's pretty easy but I miss a lot of basic skills in mechanics. I think I should apply a system of springs or masses on the second valve in order to change the moment of the weight force but I'm not sure about it and I don't know how to do it. Could somebody help me?

 

[LittleInch]

I'm not sure this will work. 2

At say 10 degrees open the horizontal flow has only a small force holding it closed related to the sine of angle but the vertical is the cosine.

So a spring would be very difficult to mimic the force.

I think.

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[stgrme]

Some flapper type non-return valves use an external arm with a weight to counterbalance the weight of the disc. I think this arrangement will work for you.

Best of luck!

 

[LittleInch]

I think you will need two springs.

One to gradually supply less force up to 45 degrees whettheforcewouldbezero and the second to gradually add force from 45 degrees to full open to mirror the horizontal flapper weight versus angle open.

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.