Mpando wosinthika ndi mpando wofewa, Mpando wa valve wosinthika, mpando wa valve ukawonongeka, mpando wokhawo umatha kusinthidwa, ndipo thupi la valve likhoza kusungidwa, lomwe limakhala lopanda ndalama.Chogwirizira zotayidwa ndi dzimbiri zosagwira ndipo ali wabwino odana ndi dzimbiri zotsatira, Mpando EPDM akhoza m'malo ndi NBR, PTFE, Sankhani malinga sing'anga kasitomala.