Simbi yakakwenenzverwa bhora vharafu ivharuvhu yakajairika, chimiro chayo chikuru ndechekuti nekuti bhora nemuviri wevharuvhu zvakasungirirwa kuita chidimbu chimwe, vharafu haisi nyore kuburitsa kuvuza panguva yekushandisa.Iyo inonyanya kuumbwa nevhavha muviri, bhora, dzinde, chigaro, gasket uye zvichingodaro.Dzinde rakabatana nevhavha handwheel kuburikidza nebhora, uye handwheel inotenderedzwa kutenderedza bhora kuti rivhure nekuvhara vharuvhu.Zvigadzirwa zvekugadzira zvinosiyana zvichienderana nekushandiswa kwenzvimbo dzakasiyana, midhiya, nezvimwe, kunyanya kabhoni simbi, simbi isina tsvina, alloy simbi, simbi yakakandwa, nezvimwe.