Ama-valve okukhipha umoya asetshenziswa emoyeni wepayipi wezinhlelo zokufudumeza ezizimele, amasistimu okushisa aphakathi nendawo, ama-boilers okushisa, isimo sokukhipha umoya esimaphakathi, ukushisisa phansi kanye nezinhlelo zokushisisa ilanga. Umgomo wokusebenza: Uma kunokuchichima kwegesi ohlelweni, igesi izokwenyuka epayipini...
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