Embonini ye-petrochemical, ukukhetha ipompo elifanele le-multistage kubalulekile. Uma kuqhathaniswa namaphampu amanzi ecacile, ukukhetha ipompo yamakhemikhali kudinga ukunakwa okukhethekile ezintweni ezinjengezici zemidiya, ukumelana nokugqwala, nokucatshangelwa kokuphepha. Kule ndatshana, iChangsha Zhonglian Pump Industry, umkhiqizi ohamba phambili wamaphampu amaningi, izonikeza ukubuka konke okuningiliziwe kokwehluka okuyinhloko kanye nokucatshangelwa okubalulekile lapho kukhethwa amaphampu amaningi okuzosetshenziswa emkhakheni we-petrocemici uma kuqhathaniswa nalezo ezenzelwe ngokukhethekile ukudlulisa ukunikela kwamanzi okucacile kokuqonda okubalulekile kwesethenjwa sakho.
