Fluid handling – Freeze condition responsive safety systems – Low temperature responsive drains
Patent
1981-08-25
1984-06-19
Wayner, William E.
Fluid handling
Freeze condition responsive safety systems
Low temperature responsive drains
126420, E03B 710
Patent
active
044548907
ABSTRACT:
A Solar Heater system including an absorber panel having an inlet and an outlet connected to a water supply tank. A valve is located in both the inlet and outlet connections and at least the inlet valve is temperature responsive so as to close when the temperature of the panel contents falls below a first predetermined temperature. The outlet valve may be temperature or flow responsive so as to close under the temperature or flow conditions prevailing when the inlet valve closes and thereby isolate the panel from the tank. A temperature responsive dump valve is connected to the panel and opens when the temperature of the panel contents falls below a second predetermined temperature which is lower than the first predetermined temperature and thereby empties the panel contents. The inlet and dump valves are preferably formed by a single combination valve having a temperature responsive element which controls both a primary valve member and a secondary valve member. The primary valve member controls flow between inlet and outlet ports of the valve and the secondary valve member controls flow between the outlet port and a dump port. The temperature responsive element has part thereof exposed externally of the valve body and is substantially insulated against the influence of the temperature conditions existing within the body of the valve.
REFERENCES:
patent: 1630907 (1927-05-01), Royer
patent: 2716418 (1955-08-01), Borgerd
patent: 3364948 (1968-01-01), Seiffert
patent: 3853269 (1974-12-01), Graber
patent: 4191166 (1980-03-01), Saarem et al.
patent: 4216902 (1980-08-01), Braukmann
patent: 4280478 (1981-07-01), Duval et al.
Ackermann Keith A.
Gaskell Lionel A.
Schoenheimer Marcus F.
Actrol Industries Pty. Ltd.
Wayner William E.
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