U-gawo butterfly valve ndi Bidirectional kusindikiza, ntchito yabwino kwambiri, mtengo waung'ono wa torque, ukhoza kugwiritsidwa ntchito kumapeto kwa chitoliro pochotsa valavu, ntchito yodalirika, mphete yosindikizira mpando ndi thupi la valve organically pamodzi, kotero kuti valavu imakhala yaitali. moyo wautumiki