hermetic chillers

Hermetic units use reciprocating compressors, which are considered as positive displacement machines. In hermetic sealed units, the motor and the compressor are directly coupled and housed in a single airtight casing that is sealed to the atmosphere.The casing is then cooled with refrigerant. This allows for reduced motor winding and minimal heat dissipation. However, due to its airtight casing, it is non-repairable, if it breaks, the compressor must be replaced entirely.