Kwiveki ephelileyo, umzi-mveliso wagqiba umsebenzi wokuvelisa ibhetshi yentsimbiivelufa butterfly. Izinto eziphathekayo zaziyintsimbi, kwaye ivalve nganye yayixhotyiswe ngesixhobo esinamavili ngesandla, njengoko kubonisiwe kulo mfanekiso ulandelayo.

Iivalve yebhabhathane emithathu eccentricifezekisa ukutywinwa okusebenzayo ngokusebenzisa isakhiwo esisodwa. Xa iziko lokujikeleza kwepleyiti yevalve (oko kukuthi, iziko le-shaft) litenxa kumgca osembindini womzimba wevalvu, lenza i-eccentricity yokuqala. Umgca osembindini wokutywinwa komphezulu wepleyiti yevalve uyatenxa kumgca osembindini womzimba wevalvu, wenze i-eccentricity yesibini. Umphezulu wokutywina wesihlalo sevalve uyilwe ngokwemilo yeconical, ukuze indawo yokutywina yepleyiti yevalvu kunye nomgangatho wokutywina wesihlalo sevalve wenze iAngile ethile. Le yi-eccentricity yesithathu.

Xa uvula i-valve, ipleyiti yevalve, phantsi kwesenzo sesixhobo sokuqhuba, iqala ikhuphe kwindawo yokutywina yesihlalo sevalve kwaye ijikeleze ukunciphisa ukukhuhlana. Xa ivaliwe, emva kokuba ipleyiti ye-valve ijikeleze kwindawo, phantsi koxinzelelo lwe-medium okanye i-force yesixhobo sokuqhuba, ibambelela ngokusondeleyo kwindawo yokutywina yesihlalo se-valve, ivimbela ukuhamba kwe-medium. Olu yilo lwe-eccentric emithathu luqinisekisa ukuba ngexesha lokuvula kunye nokuvala inkqubo yevalve, akukho phantse ukungqubuzana phakathi kwepleyiti yevalve kunye nesihlalo sokutywinwa kwendawo yokutywina, ngaloo ndlela ukwandisa ubomi benkonzo. Okwangoku, inokufikelela kwi-bidirectional yokuchasa uxinzelelo kwaye inokusebenza kakuhle kokutywinwa.

Iimeko apho iivalve zebhabhathane eziphindwe kathathu ze-eccentric zisetyenziswa kakhulu:

1. Intsimi ye-Petrochemical: Kwiiyunithi eziqhekezayo ze-oil refineries, isetyenziselwa ukulawula ukushisa okuphezulu, i-oyile ephezulu kunye ne-gas media equkethe ukungcola okucacileyo ukuqinisekisa ukusebenza okuzinzile kweyunithi; Kwimveliso yeekhemikhali, xa uthutha i-asidi eyingozi kakhulu kunye nezisombululo ze-alkali, isakhiwo sayo sokutywinwa esikhethekileyo sinokuthintela ngokufanelekileyo ukuvuza okuphakathi kunye nokuqinisekisa ukhuseleko lwemveliso.

2. Umzi-mveliso wamandla: Kwinkqubo yemibhobho yomphunga yezityalo zamandla obushushu, ivalve yebhabhathane ye-eccentric ephindwe kathathu (ivalve yebhabhathane yegiya yombungu) iyakwazi ukuziqhelanisa neemeko zokusebenza zokuvulwa rhoqo nokuvalwa komphunga wobushushu obuphezulu kwaye ilawule ngokuchanekileyo ukuhamba komphunga. Kwinkqubo yokupholisa yesiqithi senyukliya somzi-mveliso wamandla enyukliya, enokuthembeka okuphezulu kunye nokusebenza kokutywinwa, ukuhanjiswa okukhuselekileyo kwezinto zokupholisa kuqinisekisiwe kwaye ukuvuza kwezinto ezine-radioactive kuthintelwe.

3. Ubonelelo lwamanzi asezidolophini kunye nokuhanjiswa kwamanzi amdaka: Imibhobho yokulahla ilindle yamaziko amakhulu okucoca ilindle inokulisusa ilindle elinombhobho kakhulu ukunqanda ungcoliseko olubuya ngasemva. Isetyenziswa kwimibhobho engundoqo yenkqubo yonikezelo lwamanzi ezidolophini ukunqumla ngokukhawuleza ukuhamba kwamanzi, ukuququzelela ukuhlolwa kwemibhobho nokugcinwa kwayo, nokuqinisekisa ukuzinza kokunikezelwa kwamanzi ezidolophini.

4. Imboni ye-Metallurgical: I-blast furnace gas pipelines kwi-steel mills inokufikelela ukutywinwa okuthembekileyo kwiindawo ezinzima kunye noxinzelelo oluphezulu kunye nothuli, ukulawula ngokufanelekileyo ukuhamba kwegesi, kunye nokubonelela ngamandla azinzileyo kwi-smelting yokuqhuma kwesithando somlilo.