Do Megaflo and other makers of UVCs with a internal air bubble state the net HW available, I reckon that if you don't want the cylinder pressure to rise above say 4.5bar when heated to 65C that the air space is 25% of the total volume so a 150L is 112L net, 200 is 150L, 300 is 225L etc.
What is net capacity of an unvented cylinder (posts moved )
- Thread starter Johntheo5
- Start date
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The expansion relief valve is set at 8.0bar, the only one above that I see that won't lift it when a full cylinder is heated from 15C to 60C is the 300 which has a expansion volume of nearly 12% and will reach 7.5bar, all the others have a expansion volume of 10% or very slightly less and will lift the expansion valve as they would reach 9.9bar if no expansion valve was installed. This assumes the pressure reducing valve is set to 3.0bar.
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