Ndodo yolumikizira yopanda mutuvalavu yopopera mpweya, monga gawo lofunika kwambiri lowongolera mpweya wabwino m'mafakitale ndi makina operekera mpweya, ili ndi zabwino zambiri. Chofunika kwambiri ndikusiya kapangidwe ka mutu wa valavu wodziyimira pawokha wa mavalavu achikhalidwe onyowa. Kudzera mu kapangidwe kolumikizidwa ka ndodo yolumikizira, kapangidwe kake konse kamasavuta kwambiri, zomwe zimapangitsa kuti voliyumu ikhale yaying'ono. Imatha kusintha momwe ntchito ikuyendera ndi kapangidwe ka zida zokhuthala ndikusunga malo oyika.

Ma damper amapezeka kwambiri m'makina opumira mpweya m'mafakitale, m'makina opumira mpweya abwino m'misewu yapansi panthaka, ndi m'mitsempha ya mpweya wofewa m'maboiler. Ma valve a gulugufe amagwiritsidwa ntchito kwambiri m'mapaipi otumizira madzi m'malo opangira madzi, m'makina oziziritsira mpweya, komanso m'maulumikizano odulira madzi m'mafakitale a petrochemical.

Kusiyana kwakukulu pakati pa ma damper a mpweya ndi ma valve a gulugufe kuli mu momwe amagwiritsidwira ntchito komanso kapangidwe kake ka ntchito. Flue gas damper imayang'ana kwambiri kulamulira kuchuluka kwa mpweya, kutsogolera ndikudula kuyenda kwa mpweya (makamaka mpweya, mpweya wa flue ndi fumbi), pomwe ma valve a gulugufe amagwira ntchito makamaka kuzimitsa ndikuwongolera kuyenda kwa madzi, mpweya kapena nthunzi. Chifukwa cha mawonekedwe osiyanasiyana apakati ndi zochitika zogwiritsira ntchito, kusiyana kwakukulu kumapangidwa mu kapangidwe, kutseka kuyang'ana ndi zizindikiro za magwiridwe antchito.

Kuchokera pamalingaliro a kapangidwe kake, ma Guillotine dampers nthawi zambiri amagwiritsa ntchito ma valve cores okhala ndi masamba ambiri, pulagi kapena mtundu wa baffle. Ena, monga connecting rod headless air damper, amathandizanso njira yoyendera mpweya kudzera mu connecting rod transmission. Kapangidwe ka sealing kamayang'ana kwambiri kuchepetsa "kutuluka kwa mpweya" kuti akwaniritse zofunikira za kukhazikika kwa mpweya mu mpweya wabwino, kuchotsa fumbi, HVAC ndi machitidwe ena. Ma valve a gulugufe ali ndi valvu yozungulira yooneka ngati disc ngati core yawo. Valvu yozungulira imazungulira shaft ya valvu kuti itsegule ndi kutseka. Kapangidwe ka sealing kamayang'ana kwambiri "kuletsa kutuluka kwa madzi" ndipo iyenera kukwaniritsa mulingo winawake wotsutsa kuthamanga. Ndi oyenera zochitika zoyendera madzi monga madzi ndi ngalande, makampani opanga mankhwala, ndi mapaipi otentha.

Ponena za zizindikiro za magwiridwe antchito, ma valve a mpweya amasamala kwambiri kulondola kwa kuchuluka kwa mpweya komanso kukana kukokoloka kwa fumbi kuti athe kuthana ndi kuwonongeka kwa zinthu zomwe zimayambitsidwa ndi kuyenda kwa mpweya wafumbi. Ma valve a gulugufe amaika patsogolo kwambiri liwiro lotsegula ndi kutseka, kukana kuthamanga ndi kutseka magwiridwe antchito, komanso nthawi yogwirira ntchito. Ma valve ena a gulugufe omwe ali ndi mphamvu yayikulu amafunikanso kukhala ndi mphamvu yolimbana ndi kutsekeka kwa cavitation.