Vacuum Leak Testing
June 2006
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The company integrated pressure decay leak testing with a hydrogen tracer gas sniffer leak locator to create the VTech 75. Parts to be tested are first checked for gross leaks with a pressure decay system, then evacuated and backfilled with a mixture of 95 percent nitrogen and 5 percent hydrogen. Using the sniffer probe, fine leaks (around 0.10 ounce per year of R-134a) can be located and then repaired. The unit is applicable for the refrigeration and air-conditioning industries, as well as coil manufacturing. VTech,


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