Valavu yosakhala yokhazikika ndi mtundu wa valavu yopanda miyezo yomveka bwino yogwirira ntchito. Magawo ake ogwirira ntchito ndi miyeso yake amasinthidwa mwapadera malinga ndi zofunikira pa ndondomekoyi. Itha kupangidwa ndikusinthidwa momasuka popanda kukhudza magwiridwe antchito ndi chitetezo. Komabe, njira yopangira makina imatsatirabe zofunikira za muyezo wadziko lonse.

Kapangidwe ka ma valve osakhala a muyezo kayenera kuganizira zanzeru ndi kuthekera konse. Kuwonjezera pa kudalira ziphunzitso zachikhalidwe, kapangidwe kameneka kamafunikanso kafukufuku ndi chitukuko chapamwamba kwambiri. Chifukwa chake, nthawi zambiri, pali akatswiri odziwika bwino mumakampani kuti amalize ntchito yofanana, ndipo mainjiniya adzapereka zojambulazo kaye kapangidwe kake kakatha.

Mitundu ya ma valve osakhala a muyezo imagawidwa m'magulu awiri: sewage seaweary sequence (penstock gate ndi flap valve) ndi metallurgical valve sequence (ventilation butterfly valve, slide gate valve, goggle valve, ash discharge valve, etc.)

1. Mndandanda wa ma valve a zimbudzi

2. Mndandanda wa mavavu a zitsulo