Valavu imagwiritsidwa ntchito potsegula ndi kutseka payipi, kuwongolera kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe kake. Malingana ndi ntchito yake, ikhoza kugawidwa mu valve shutoff, valve check, valve regulating, etc.

Valavu ndi gawo lolamulira mu kayendedwe ka madzimadzi, omwe ali ndi ntchito zochepetsera, kulamulira, kusokoneza, kulepheretsa kutsutsa, kukhazikika kwa mphamvu, kusokoneza kapena kutulutsa mpumulo, ndi zina zotero.

Mavavu angagwiritsidwe ntchito kuwongolera kuyenda kwa mpweya, madzi, nthunzi, zowononga media, matope, mafuta, zitsulo zamadzimadzi ndi ma radioactive media ndi mitundu ina yamadzimadzi. Mavavu molingana ndi zinthuzo amagawidwanso kukhala mavavu achitsulo, mavavu achitsulo, mavavu osapanga dzimbiri (201, 304, 316, etc.), mavavu achitsulo a chromium molybdenum, mavavu achitsulo a chromium molybdenum vanadium zitsulo, mavavu achitsulo agawo awiri, mavavu apulasitiki, mavavu osakhazikika.

Vavu ili mu dongosolo lamadzimadzi, lomwe limagwiritsidwa ntchito poyang'anira njira yamadzimadzi, kuthamanga, kutuluka kwa chipangizocho, kupanga chitoliro ndi zipangizo zapakati (zamadzimadzi, gasi, ufa) zimayenda kapena kuyimitsa ndikuyendetsa kayendedwe ka chipangizocho.

Valve ndi gawo lowongolera la payipi yamadzimadzi yotumizira, yomwe imagwiritsidwa ntchito kusintha gawo la ndimeyi ndi njira yapakati yoyenda, ndikusintha, kudulidwa, kugunda, cheke, kusokoneza kapena kusefukira. Vavu yomwe imagwiritsidwa ntchito poyang'anira madzimadzi, kuchokera ku valavu yosavuta kwambiri yapadziko lonse kupita ku njira yovuta kwambiri yoyendetsera ntchito yomwe imagwiritsidwa ntchito mumitundu yosiyanasiyana ya mavavu, mitundu yake ndi mafotokozedwe, kukula kwadzina kwa valve kuchokera ku valavu yaing'ono kwambiri mpaka kukula kwa valavu yamapaipi a mafakitale mpaka 10m. Angagwiritsidwe ntchito kulamulira madzi, nthunzi, mafuta, gasi, matope, zosiyanasiyana zikuwononga TV, zitsulo zamadzimadzi ndi radioactive madzimadzi ndi mitundu ina ya madzimadzi otaya, kuthamanga ntchito valavu akhoza kuchokera 0.0013MPa kuti 1000MPa wa kopitilira muyeso-mkulu kuthamanga, kutentha ntchito kungakhale C-270 ℃ wa kopitilira muyeso-otsika kutentha kwa ℃ 1430 kutentha kwambiri.

Valavu imatha kuwongoleredwa ndi njira zosiyanasiyana zotumizira, monga manual, magetsi, hydraulic, pneumatic, turbine, electromagnetic, electromagnetic, electro-hydraulic, electro-hydraulic, gas-hydraulic, spur gear, bevel gear drive; Pakukakamiza, kutentha kapena mawonekedwe ena pansi pa ma sensor sensa, kuchitapo kanthu, molingana ndi kufunikira kwa kusungitsa kapena kusadalira ma sensor a sensor kuti atsegule kapena kutseka, kudalira pagalimoto kapena makina odziyimira pawokha amapangitsa kutsegula ndi kutseka valavu yokweza, kutsetsereka, malo kapena kuzungulira, kuti musinthe kukula kwa doko kuti muzindikire ntchito yolamulira.