Lapho i-check valve ifaneleka khona.

Inhloso yokusebenzisa i-check valve ukuvimbela ukugeleza okuphambene kwe-medium, futhi i-check valve ngokuvamile ifakwa endaweni yokuphuma yepompo. Ngaphezu kwalokho, i-check valve kufanele ifakwe endaweni yokuphuma ye-compressor. Ngamafuphi, ukuze kuvinjelwe ukugeleza okuphambene kwe-medium, kufanele kufakwe i-check valve emishinini, kudivayisi noma epayipini.

Ngokuvamile, ama-valve okuhlola ukuphakama aqondile asetshenziswa kumapayipi avundlile anobubanzi obungu-50mm. I-valve yokuhlola ukuphakama eqondile ingafakwa kumapayipi avundlile navundlile. I-valve engezansi ngokuvamile ifakwe kuphela kumapayipi avundlile okungena kwephampu, kanti okuphakathi kugeleza kusuka phansi kuya phezulu.

I-valve yokuhlola i-swing ingenziwa ibe yingcindezi yokusebenza ephezulu kakhulu, i-PN ingafinyelela ku-42MPa, kanti i-DN nayo ingenziwa ibe nkulu kakhulu, inani eliphezulu lingafinyelela ngaphezu kuka-2000mm. Ngokwezinto ezahlukene zegobolondo kanye nesivalo, ingasetshenziswa kunoma iyiphi indawo yokusebenza kanye nanoma yiliphi izinga lokushisa lokusebenza. Indawo yokusebenza ingamanzi, umusi, igesi, indawo ebolile, uwoyela, ukudla, imithi, njll. Izinga lokushisa lokusebenza kwendawo yokusebenza liphakathi kuka--196~800℃.

Indawo yokufaka ivalvu yokuhlola i-swing ayinqunyelwe, ivame ukufakwa epayipini elivundlile, kodwa ingafakwa futhi epayipini eliqondile noma epayipini elithambekele.

Isikhathi esisebenzayo se-butterfly check valve singumfutho ophansi kanye nobubanzi obukhulu, futhi isikhathi sokufakwa sinqunyelwe. Ngoba ingcindezi yokusebenza ye-butterfly check valve ayikwazi ukuba phezulu kakhulu, kodwa ububanzi obujwayelekile bungaba bukhulu kakhulu, obungafinyelela ngaphezu kuka-2000mm, kodwa ingcindezi elinganiselwe ingaphansi kuka-6.4MPa. I-butterfly check valve ingenziwa ibe uhlobo lwe-wafer, oluvame ukufakwa phakathi kwama-flange amabili epayipi ngendlela yokuxhumeka kwe-wafer.

Indawo yokufaka i-butterfly check valve ayinqunyelwe, ingafakwa kupayipi elivundlile, ipayipi eliqondile noma ipayipi elithambekele.

I-valve yokuhlola i-diaphragm ifanele amapayipi avame ukushaywa yi-water hammer. I-diaphragm ingasusa kahle i-water hammer ebangelwa ukugeleza okuphambene kwe-medium. Njengoba izinga lokushisa lokusebenza kanye nengcindezi yokusebenza kwama-valve okuhlola i-diaphragm kunqunyelwe yizinto ze-diaphragm, ngokuvamile asetshenziswa kumapayipi anomfutho ophansi kanye nokushisa okujwayelekile, ikakhulukazi kumapayipi amanzi ompompi. Ngokuvamile, izinga lokushisa lokusebenza le-medium liphakathi kuka--20~120℃, kanti ingcindezi yokusebenza ingaphansi kuka-1.6MPa, kodwa i-valve yokuhlola i-diaphragm ingafinyelela ububanzi obukhulu, kanti i-DN ephezulu ingaba ngaphezu kuka-2000mm.

I-valve yokuhlola i-diaphragm isetshenziswe kabanzi eminyakeni yamuva nje ngenxa yokusebenza kwayo okuhle kakhulu kokungangenwa amanzi, isakhiwo sayo esilula kanye nezindleko zokukhiqiza eziphansi.

I-valve yokuhlola ibhola isebenza kahle ekuvaleni, isebenza ngokwethembeka futhi imelana kahle nesando samanzi ngoba uphawu luyindilinga embozwe ngerabha; futhi ngenxa yokuthi uphawu lungaba ibhola elilodwa noma amabhola amaningi, lungenziwa lube ububanzi obukhulu. Kodwa-ke, uphawu lwayo luyindilinga engenalutho embozwe ngerabha, engafaneleki kumapayipi anomfutho ophezulu, kodwa efanelekile kuphela kumapayipi anomfutho ophakathi nendawo naphansi.

Njengoba izinto zegobolondo zevalvu yokuhlola ibhola zingenziwa ngensimbi engagqwali, kanti imbulunga engenalutho yesivalo ingambozwa ngepulasitiki yobunjiniyela ye-PTFE, ingasetshenziswa futhi emapayipini anemidiya evamile yokubola.

Izinga lokushisa lokusebenza lalolu hlobo lwe-check valve liphakathi kuka -101~150℃, ingcindezi evamile ingu-≤4.0MPa, kanti ububanzi bobubanzi obujwayelekile buphakathi kuka-200~1200mm.