Category Archives for Refrigerants

Detecting Methyl Chloride Leak

Leaks are detected by a leak-detecting halide torch (see Fig. 5-6). Some torches use alcohol for fuel and produce a colorless flange. When a methyl chloride leak is detected, the flame turns green. A brilliant blue flame is produced when … Continue reading

05. January 2011 by admin
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Detecting Ammonia Leak

Leaks are detected (in small amounts of ammonia) when a lit sulfur candle is used. The candle will give off a very thick, white smoke when it contacts the ammonia leak. The use of phenolphthalein paper is also considered a … Continue reading

05. January 2011 by admin
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Detecting Carbon Dioxide Leak

Leaks can be detected with a soap solution if there is internal pressure on the part to be tested. When carbon dioxide is present in the condenser water, the water will turn yellow with the addition of bromothymol blue.

05. January 2011 by admin
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Detecting Sulfur Dioxide Leak

To detect sulfur dioxide leaks, an ammonia swab may be used. The swab is made by soaking a sponge or cloth tied onto a stick or piece of wire in aqua ammonia. Household ammonia may also be used. A dense … Continue reading

05. January 2011 by admin
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Freon Reaction to Plastics

A brief summary of the effect of Freon compounds on various plastic materials follows. However, compatibility should be tested for specific applications. Differences in polymer structure and molecular weight, plasticizers, temperature, and pressure may alter the resistance of the plastic … Continue reading

05. January 2011 by admin
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Freon Reaction to Metal

Most of the commonly used construction metals, such as steel, cast iron, brass, copper, tin, lead, and aluminum, can be used satisfactorily with the Freon compounds under normal conditions of use. At high temperatures some of the metals may act … Continue reading

05. January 2011 by admin
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Ethyl Chloride Refrigerants

Ethyl chloride (C2H5Cl) is not commonly used in domestic refrigeration units. It is similar to methyl chloride in many ways. It has a boiling point of 55.6°F (13.1°C) at atmospheric pressure. Critical temperature is 360.5°F (182.5°C) at a pressure of … Continue reading

05. January 2011 by admin
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Calcium Chloride Refrigerants

Calcium chloride (CaCl2) is used only in commercial refrigeration plants. Calcium chloride is used as a simple carrying medium for refrigeration. Brine systems are used in large installations where there is danger of leakage. They are used also where the … Continue reading

05. January 2011 by admin
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Carbon Dioxide Refrigerants

Carbon dioxide (CO2) is a colorless gas at ordinary temperatures. It has a slight odor and an acid taste. Carbon dioxide is nonexplosive and nonflammable. It has a boiling point of 5°F (?15°C). Apressure of over 300 psi is required … Continue reading

05. January 2011 by admin
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Ammonia Refrigerants

Ammonia (NH3) is used most frequently in large industrial plants. Freezers for packing houses usually employ ammonia as a refrigerant. It is a gas with a very noticeable odor. Even a small leak can be detected with the nose. Its … Continue reading

05. January 2011 by admin
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