Cylinder head

In a hermetic compressor the cylinder head (often informally abbreviated to just head) sits above the cylinders on top of the cylinder block. It closes in the top of the cylinder, forming the pressure chamber. This joint is sealed by a head gasket. In most compressors, the head also provides space for the passages that feed gas to the cylinder, and that allow the pressurized gas to escape.

​It forms the pressure chamber that creates spaces for passages of the feed gas to the cylinder, and that allow the pressurized gas to escape.