Page 221 - Reciprocating Compressors Operation Maintenance

Operation and Maintenance of Reciprocating Compressors 2O7

FIGURE 3-62. Reverse flow unloading device in suction passage of a
compressor cylinder (Source: Hoerbiger Corporation of America, Pompano
Beach, Florida).

Figure 3-62 shows this control in the suction passage of a compressor
cylinder,

MAINTENANCE OF COMPRESSOR CONTROLS

Compressor control systems that have been properly set initially are
generally trouble-free and require little maintenance. Probably the great-
est problems are caused by dirt and moisture entering the pneumatic sys-
tem and plugging orifices. It is, therefore, important to maintain and
change any strainers and filters that are included in the system.
Table 3-12 represents an operation chart for a two-stage compressor
equipped with five-step control. It includes checks to assist in trou-
bleshooting.