Thermostatic expansion valves (TXV) are responsible for metering the proper amount of refrigerant into an evaporator coil. When they fail, they either cause the evaporator to be flooded (overfed) or starved (underfed) for refrigerant. Read more and find out how to diagnose a defective TXV.
Many larger compressors in the refrigeration and air conditioning field have forced-oiling systems. These compressors are usually over 5 hp. They contain an oil pump located at the end of the compressor’s crankshaft. The crankshaft is actually connected to the oil pump and supplies power, which turns the oil pump.
The electronic expansion valve (EEV) operates with a much more sophisticated design than a conventional TXV. Here are some electronic expansion valve basics.
Many refrigeration compressors incorporate a suction service valve and a discharge service valve. Working with these valves is not difficult, but there are some finer points to remember.
Reversing valves can be difficult to remove because they have four solder joints to deal with at the same time and, to make matters worse, they are very heat sensitive.
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