Page 227 - Compression Machinery for Oil and Gas
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216 SECTION    II Types of Equipment









                     Pressure  P d




                     P
                      s



                           V                                   V
                        0
                            min                                 max
                                          Volume
            FIG. 5.34 Pressure-volume diagram for a deactivated end (red). (Courtesy of Ariel Corporation.)



































            FIG. 5.35 Plug-type suction valve unloader. (Courtesy of Ariel Corporation.)
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