To calculate you would need to measure or assume some geometry conditions. <br>
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I list assumptions I would use for general conditions below. I believe most swing check valves seat at 30 degrees or less so use this. You will need to assume some flapper geometry so use the internal diameter...
The question of why you would not want to use a butterfly for control is mostly related to the type of butterfly. If you have a simple plate type valve then it will not exhibit the full range you have indicated. You need a butterfly designed to be a control valve. These valves have several...
A simple formula based on pressure would be misleading. You need to combine the collapse pressure with external pressures caused by interaction with the ground. To do this correctly I would need some additional information regarding the intended usage and rigs it would be attached to.<br>
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Not sure if you want to consider alternatives to your question. But if you are look below.<br>
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You might want to consider a different type of aluminum. Or if the instrument is old maybe it is better to just purchase a replacement.
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The easiest is to insert a rotary spray head into the tank and spray for a minute or two.<br>
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I think most small tank coatings are applied with some variant of this method. <br>
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Hope this is what you are looking for.
I am also dprice.<br>
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I wanted to answer your questions a bit better. When converting to oil the pressure drop in the boiler will be lower than gas so you should be O.K.<br>
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The flue gas volumes should also drop slightly. <br>
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You can usually narrow a flame but the result is...