Sanitary manual welded butterfly valve, kapangidwe kosavuta, voliyumu yaying'ono, kulemera kwapang'onopang'ono, kukula kwazing'ono, torque yaying'ono yoyendetsa, yosavuta komanso yofulumira, ndipo imakhala ndi ntchito yabwino yoyendetsera kayendetsedwe kake komanso mawonekedwe osindikiza.