Nui nā kumu e noʻonoʻo ai i ke koho ʻana i kahi axial split case pump a me ka impeller pololei. 

ʻO ka mea mua, pono mākou e ʻike i kahi e lawe ʻia ai ka wai a me ka nui o ke kahe. ʻO ka hui ʻana o ke poʻo a me ke kahe e pono ai ke kapa ʻia ʻo ka duty point. Pili pono ke kiko duty i ka geometry impeller e pono ai. Pono nā mea hoʻohana me ka hoʻoheheʻe kūpaʻa lōʻihi (ke poʻo kiʻekiʻe) i nā impellers anawaena o waho ma mua o nā noi me ka pumping vertical pōkole (pumping).

Another consideration that is directly related to impeller size is the expected solids content in the application. Many applications have a variety of solids in the pumped media. These solids can range from small abrasive debris such as sand or metal shavings to fine fibrous materials to large solids the size of a baseball or larger. The pump and impeller selected must be able to pass these solids while avoiding clogging and damage from wear. Additional consideration must also be given to the equipment downstream of the axial split case pump. While a pump can be selected to pass a specific type of solids, it cannot be assumed that the downstream piping, valves, and other process equipment will have the same solids handling capabilities. Knowing the expected solids content in the liquid is critical not only to selecting the right size pump and impeller, but also to selecting the impeller style that best suits the application.

ʻO kekahi o nā mea paʻa maʻamau e mālama i nā impellers ʻo ia ka impeller hāmama. Hoʻohana maʻamau ʻia kēia impeller i ka hoʻomaʻemaʻe ʻana i ka wai a me ka hoʻomaʻemaʻe wai a loaʻa kahi geometry e komo pū ana ma waena o nā lau me ka ʻaoʻao ākea e kū pono ana i ka puka komo. Hāʻawi nā hakahaka ma waena o nā lau i kahi ala maʻemaʻe no ka impeller e hoʻokuʻu i nā mea paʻa e komo mai ana mai ka lua hoʻoheheʻe impeller a i ka volute a i ka hopena ma o ka hoʻokuʻu ʻana i ka paila.

ʻO kahi koho ʻē aʻe no ka lawelawe ʻana i nā mea paʻa ʻo ka vortex a i ʻole impeller recessed. Hoʻokomo ʻia kēia ʻano o ka impeller i loko o kahi pahu (e hana ana i kahi ākea ākea ma waena o ka impeller a me ka port suction) a hoʻoulu i ka neʻe ʻana o ka wai ma o nā vortices i hana ʻia e ka wikiwiki o ka impeller. ʻOiai ʻaʻole maikaʻi kēia ala, hāʻawi ia i nā pono he nui no ka hele ʻana o nā solids. ʻO nā pōmaikaʻi nui, ʻo ia ka wahi kaʻawale nui a me ka pale liʻiliʻi i ka hele ʻana o nā mea paʻa.

Pumps used at high altitudes have their own set of solids handling considerations. Since these applications typically use smaller piping, the solids passage size of the entire system must be considered, not just the pump. Typically, the axial split case pump manufacturers offering high-pressure pumps will include a strainer at the inlet to prevent large solids from entering the pump. 

This is ideal for high-pressure applications where minimal solids are expected, but can cause clogging if enough solids accumulate around the screen surface.

There are many factors to consider when choosing the right axial split case pump and impeller, and understanding the various styles of pumps and impellers is often one of the most critical steps.