Heating systems – Water – Expansion tanks
Patent
1979-02-06
1981-02-03
Makay, Albert J.
Heating systems
Water
Expansion tanks
237 56, 237 19, 126362, 137 59, F24D 310
Patent
active
042483786
ABSTRACT:
This invention relates to self-priming devices for indirect domestic water heating systems which device acts as expansion and contraction chambers for primary and secondary water in the system. The device consists of a closed housing divided internally by a wall intermediate its ends to form axially disposed first and second chambers. A open ended tubular member extends from the wall into the second chamber to provide communication between the chambers and an inlet and outlet is provided in the second chamber adjacent the wall. At least one inlet is provided in the first chamber at the end remote from the wall. The first chamber is connected to a primary water circuit and the second chamber is connected to the secondary water circuit to separate the water in one circuit from the water in the other circuit. The volume of the first chamber is substantially 4 to 4.5% of the volume of water content of the primary circuit and the volume of the portion of the second chamber between the inlet and outlet and the end of the tubular member being substantially equal to the volume of the first chamber and an auto vent device is located adjacent the end of the first chamber remote from the wall.
Bennett Henry
Fleming Fabrications Limited
Makay Albert J.
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