Leakage testing method for a plate heat exchanger
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United States of America Patent
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May 16, 2000
Issued Date -
N/A
app pub date -
Oct 20, 1998
filing date -
Dec 14, 1993
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A vessel such as a dairy pasteuriser having a path B for product and a separate path A for coolant in intimate relationship is tested for leaks by circulating a donor fluid under pressure in path A whilst a recipient fluid such as clean tap water is circulated in path B. If the donor fluid is an electrolyte, a probe 12 is placed in path B to measure the conductivity of the recipient fluid. A rise in conductivity over a period indicates leakage between the two paths, the rate of change indicating the size of the leak. Alternatively, the donor fluid can be a gas, and leakage detected using an untrasound probe.
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