Ngokuvamile, isihlungi sikawoyela we-compressor yomoya siyisihlungi esimahhadla esifakwe endaweni yokungena yephampu kawoyela, ngaleyo ndlela sigwema ukungcola 'kungena epompo.Lolu hlobo lwesihlungi lulula ngesakhiwo.Inokumelana okuphansi kodwa ukugeleza kukawoyela okukhulu.Ifayili yokugeleza okuphezulu igxilile epayipini lokubuyisela uwoyela wesistimu ye-hydraulic, ukuze kuhlungwe izinhlayiya zensimbi, ukungcola kwepulasitiki, njll. Ukusetshenziswa okuyinhloko kwalolu hlobo lokuhlunga ukugcina ukuhlanzeka kwamafutha abuyisiwe ngaphakathi kwethangi likawoyela.Isihlungi se-Duplex sinesakhiwo esilula nokusetshenziswa okulula.Ngaphandle kwe-valve ye-bypass, iphinde ifakwe isixwayiso sokuvimbela noma ukungcoliswa kokungcola, ukuze kuqinisekiswe ukuphepha kwesistimu.
