Muaj cov twj tso kua mis ua haujlwm feem ntau ntawm lub hauv paus ntsiab lus ntawm cov tshuab ua kua, hloov hluav taws xob lossis thermal zog rau hauv lub cev thiab lub zog muaj peev xwm ntawm cov kua los ntawm lub zog siv tshuab. Piv txwv li, lub twj tso kua mis centrifugal siv impeller tig los ua kom muaj zog centrifugal, propelling kua los ntawm qhov chaw mus rau sab nrauv, yog li tsim kom muaj qhov sib txawv ntawm kev thauj mus los; Cov twj tso kua mis zoo, ntawm qhov tod tes, kos rau hauv thiab tawm cov kua los ntawm kev hloov pauv hauv ntim ntawm lawv lub twj tso kua mis chamber. Kev xaiv lub twj tso kua mis muaj kev xav txog cov yam ntxwv xws li cov yam ntxwv ntawm kev tshaj tawm (piv txwv li, viscosity, corrosiveness, solids content), kev ua haujlwm ib puag ncig (xws li, kub, siab), thiab kev teeb tsa (piv txwv li, qhov chaw txwv, piping layout).
Cov twj tso kua mis muaj ntau yam. Raws li lawv txoj haujlwm ua haujlwm, lawv tuaj yeem muab faib ua cov twj centrifugal, cov twj tso kua mis zoo, cov twj tso kua mis axial, cov twj tso kua mis sib xyaw, thiab lwm yam; Raws li lawv daim ntawv thov, lawv tuaj yeem muab faib ua cov twj tso kua dej, cov twj tso kua dej huv, cov twj siv tshuaj, cov twj tua hluav taws, thiab lwm yam. Cov ntsiab lus tseem ceeb ntawm cov twj muaj xws li ntws tus nqi (m³ / h), lub taub hau (m), lub zog (kW), ceev (rpm), thiab efficiency. Cov kev txwv no cuam tshuam ncaj qha rau lub twj tso kua mis kev ua haujlwm thiab cov xwm txheej siv tau.