CryoProbe and Other Accessories
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10.2.1.1 Helium Compressor - Indoor Water Cooled
• Requires chilled water source (supplied by customer) with a flow and temperature within
the specified admissible ranges shown in the plots below. It is important that not only the
temperature stays below the maximum temperature threshold but also the flow is not
greater than the upper threshold shown. Caution: Do not use demineralized or deionized
water.
• The water supply and return lines to the He compressor should be fitted with tempera-
ture, flow, and pressure gauges that are visible. The water hoses from the water lines to
the He compressor should be 3/4" in size. These hoses are not supplied with the Cry-
oProbe system, and are to be provided by the customer.
• It is recommended to isolate the cooling water loop for the He compressor from the build-
ing water system by using either a refrigerated chiller or a water-water heat exchanger. If
building cooling water is not available, an air-cooled indoor or outdoor chiller may be
used.
Figure10.2: Admissible Ranges for the Temperature and Flow of the Cooling Water.
Figure10.3: Cooling Water Typical Flow Characteristics
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