Figure 7-23.Cross section of an open type of reciprocating compressor.
Figure 7-24.Small semisealed compressor.
circulation at low oil pressure may be provided by
slingers, screw type of devices, and the like. Splash and
other types of oil feed must hot be considered inferior
forced feed. With good design, they lubricate well. It
is most important to maintain the proper oil level, use a
correct grade of oil, and keep the system clean and free
of dirt and moisture. This is true for all compression
refrigeration systems, especially those equipped with
Figure 7-25.Vertical semisealed compressor.