Ma valve osindikizira amapangidwa kuti azitentha kwambiri komanso ntchito zothamanga kwambiri makamaka mumagetsi.Poyerekeza ndi ma valve a bonnet, ma valve osindikizira a BVMC ndi ovuta kwambiri ndipo amatha kupereka ntchito yabwino yosindikizira ndikukonza pang'ono.