Orisirisi awọn aṣayan metallurgic lọpọlọpọ - fifa jade awọn ayokele lori ẹhin ati iwaju (lori awọn impellers pipade) dinku isọdọtun laarin fifa soke, ati iranlọwọ ni idilọwọ idoti edidi - awọn simẹnti yiyan ti taara tabi awọn ayokele ologbele-Francis (lati 2 si 8 vanes lori awọn iwọn kan) pese awọn aṣayan hydraulic gbooro ni awọn iwọn ẹyọkan.