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Expansion vessels
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<blockquote data-quote="Sidewinder" data-source="post: 434154" data-attributes="member: 9512"><p>If the system is sealed, and pr-charged to say the same pressure as the pre-charge in the expansion vessel, ignoring for now the expansion vessel.</p><p></p><p>Then as the water is heated, it will expand, as will the pipework, etc. but, the static pressure in the system will increase, thus increasing the pressure in the water side of the expansion vessel, thus the pressure in the gas side of the expansion vessel, they are just a gas bladder accumulator, and are subject to the same laws of physics as every other system on this planet.</p></blockquote><p></p>
[QUOTE="Sidewinder, post: 434154, member: 9512"] If the system is sealed, and pr-charged to say the same pressure as the pre-charge in the expansion vessel, ignoring for now the expansion vessel. Then as the water is heated, it will expand, as will the pipework, etc. but, the static pressure in the system will increase, thus increasing the pressure in the water side of the expansion vessel, thus the pressure in the gas side of the expansion vessel, they are just a gas bladder accumulator, and are subject to the same laws of physics as every other system on this planet. [/QUOTE]
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