Izinhlobonhlobo zezinketho ze-metallurgic - khipha ama-vanes ngemuva nangaphambili (kuma-impeller avaliwe) anciphisa ukujikeleza kabusha ngaphakathi kwepompo, futhi asize ekuvimbeleni ukungcoliswa kwezimpawu - ukukhishwa kokuzikhethela kwama-vanes aqondile noma ama-semi-Francis (kusuka kuma-vane angu-2 kuye kwayi-8 kumasayizi athile) okunikezwayo izinketho ezibanzi zama-hydraulic ngamasayizi angawodwa.