Chitsulo chachitsulo chosungunuka bwino ndi valve yofala kwambiri, mbali yake yaikulu ndi yakuti chifukwa mpira ndi thupi la valve zimapangidwira mu chidutswa chimodzi, valavu si yosavuta kutulutsa kutuluka pamene ikugwiritsidwa ntchito.Amapangidwa makamaka ndi valavu thupi, mpira, tsinde, mpando, gasket ndi zina zotero.Tsinde limalumikizidwa ndi gudumu lamanja la valavu kudzera mu mpirawo, ndipo gudumu lamanja limazunguliridwa kutembenuza mpirawo kuti utsegule ndi kutseka valavu.Zida zopanga zimasiyana malinga ndi kugwiritsa ntchito malo osiyanasiyana, media, etc., makamaka chitsulo cha carbon, chitsulo chosapanga dzimbiri, chitsulo cha aloyi, zitsulo zotayidwa, etc.