Sanitary manual welded butterfly valve, kapangidwe kosavuta, voliyumu yaying'ono, kulemera kwapang'onopang'ono, kakulidwe kakang'ono, torque yaying'ono yoyendetsa, yosavuta komanso yofulumira, komanso imakhala ndi ntchito yabwino yoyendetsera bwino komanso kusindikiza.