Packing provides the dynamic seal between the cylinder and the piston rod. It consists of a series of Teflon rings mounted in a packing case,…
Most field compressors use hydrodynamic type or “journal” bearings. As shown in Figure 11-12, oil enters into the bearing from supply holes strategically placed along…
The piston is located at the end of the piston rod and acts as a movable barrier in the compressor cylinder. It is generally made…
The crosshead converts the rotating motion of the connecting rod to a linear, reciprocating motion, which drives the piston as shown in Figure 11-10. The…
A distance piece provides the separation of the compressor cylinder from the compressor frame as shown in Figure 11-9. At the top of the figure…
Many variations and combinations of cylinder types and arrangements are available from the compressor manufacturers. The compressor manufacturer will generally make its selection based on…
A cylinder is a pressure vessel that holds the gas during the compression cycle. There are two basic types: 1. Single-acting cylinders are those where…
The compressor frame, shown in Figure 11-2, is a heavy, ragged casting containing all the rotating parts and on which the cylinders and crossheads are…
These devices are required to isolate the compressor for the same reasons they are required for reciprocating compressors. Discharge Check Valve (Each Stage) In reciprocating…
Slowdown valves must be installed in centrifugal compressors for the same reasons as in reciprocating compressors. They must be designed with more care than those…