M'makampani amakono owongolera mafunde, ma valavu ophatikizika amachulukirachulukirachulukirachulukira chifukwa cha kapangidwe kake kophatikizika, kuyika kwake kosavuta komanso kutsika mtengo koyambira & kukonza poyerekeza ndi macheke achikale a flanged.BVMC imapereka mbale imodzi ndi mavavu amtundu wapawiri wawafer okhala ndi zinthu zosiyanasiyana.