Uma iphampu ye-casing ehlukanisayo sihlangabezana nezinkinga ngesikhathi sokusebenza, sivame ukucabangela ukuthi ukukhetha kwepompo kungase kungabi okuphelele noma okunengqondo. Ukukhethwa kwephampu okungenangqondo kungase kubangelwe ukungaqondi ngokugcwele izimo zephampu nokufaka, noma ngokungacabangi ngokucophelela nokuhlaziya isimo esithile.

Amaphutha ajwayelekile ku iphampu ye-casing ehlukanisayo ukukhetha kuhlanganisa:

1. Ububanzi bokusebenza obuphakathi kwamazinga aphezulu kanye nobuncane bokugeleza kokusebenza kwephampu abunqunywa. Uma iphampu ekhethiwe inkulu kakhulu, kuzoba khona "imajini yokuphepha" eningi enamathiselwe ekhanda elidingekayo kanye nokugeleza, okuzokwenza ukuthi isebenze ngaphansi komthwalo ophansi. Lokhu akugcini nje ukunciphisa ukusebenza kahle, kodwa futhi kubangela ukudlidliza okukhulu nomsindo, okubangela ukugqoka kanye ne-cavitation.

2. Ubuningi bokugeleza kwesistimu akucaciswanga noma akulungisiwe. Ukunquma ubuncane bekhanda elidingekayo kulo lonke uhlelo lwepompo, izici ezilandelayo zidinga ukucatshangelwa:

2-1. I-vacuum encane;

2-2. Ukucindezela okuphezulu kwe-inlet ngesikhathi sokusebenza;

2-3. Ubuncane bekhanda lokudonsa amanzi;

2-4. Ukuphakama okuphezulu kokumunca;

2-5. Ukumelana nepayipi elincane.

3. Ukuze kuncishiswe izindleko, usayizi wepompo ngezinye izikhathi ukhethwa ngaphezu kobubanzi obudingekayo. Lokhu kusho ukuthi i-impeller idinga ukusikwa ngokwezinga elithile ukuze kuzuzwe iphuzu lokusebenza elicacisiwe. Kungase kube nokugeleza okubuyela emuva ku-inlet ye-impeller, okungase kubangele umsindo omkhulu, ukudlidliza kanye ne-cavitation.

4. Izimo zokufakwa endaweni yepompo azicatshangelwa ngokugcwele. Kubalulekile ukuhlela ipayipi lokumunca ngokunengqondo ukuze kuqinisekiswe izimo ezinhle zokungena.

5. Imajini ephakathi kwe-NPSHA ne-NPSH₃(NPSH) ekhethwe iphampu ayinkulu ngokwanele, okuzobangela ukudlidliza, umsindo noma i-cavitation.

6. Izinto ezikhethiwe azifanelekile (ukugqwala, ukugqoka, i-cavitation).

7. Izingxenye zemishini ezisetshenzisiwe azifanelekile.

Kuphela ngokukhetha imodeli efanele kungaba i-casing casing iphampu iqinisekiswe ukuthi izosebenza ngokuzinzile endaweni yokusebenza edingekayo futhi nokugcinwa kwepompo kungancishiswa ngokufanelekile.