U-section butterfly valve he Bidirectional sealing, hana maikaʻi loa, waiwai torque liʻiliʻi, hiki ke hoʻohana ʻia ma ka hopena o ka paipu no ka hoʻokuʻu ʻana i ka valve, ka hana hilinaʻi, ke apo seal noho a me ke kino valve i hui pū ʻia i hoʻokahi, i lōʻihi ka lōʻihi. ola lawelawe