Kufuneka uthenge iivalvu zePVC kwiprojekthi ethile, kodwa ikhathalogu iyamangalisa. Ibhola, itshekhi, ibhabhathane, idiaphragm—ukukhetha engalunganga kuthetha inkqubo evuzayo, engaphumeleliyo, okanye engasebenzi kakuhle.

Iintlobo eziphambili zeevalvu zePVC zahlulwe ngokwemisebenzi yazo: iivalvu zebhola zokulawula ukuvala/ukuvula, iivalvu zokujonga ukuthintela ukubuya kwamanzi, iivalvu zebhabhathane zokuthintela ukubhoboza imibhobho emikhulu, kunye neevalvu zediaphragm zokuphatha ulwelo olubolayo okanye olucocekileyo.

Lo ngumbuzo endihlala ndiwuxoxa namaqabane am, kuquka uBudi, umphathi ophezulu wokuthenga e-Indonesia. Abathengi bakhe, ukususela kubakhi ukuya kubathengisi, kufuneka bazi ukuba bafumana isixhobo esifanelekileyo somsebenzi.inkqubo yokufakelwa kwamanziinamandla kuphela njengenxalenye yayo ebuthathaka, kwaye ukhetha echanekileyouhlobo lwevalvulinyathelo lokuqala ekwakheni inkqubo ethembekileyo nehlala ixesha elide. Ukuqonda la mahluko akuyonto nje yolwazi lobuchwephesha; sisiseko seprojekthi ephumelelayo.

Ngaba kukho iintlobo ezahlukeneyo zeevalvu zePCV?

Uva igama elithi “i-PVC valve” kwaye usenokucinga ukuba yimveliso enye, eqhelekileyo. Le ngcinga inokukhokelela ekubeni ufake i-valve engakwaziyo ukumelana noxinzelelo okanye ukwenza umsebenzi owufunayo.

Ewe, kukho iintlobo ezininzi zeevalvu zePVC, nganye inendlela yayo yangaphakathi eyahlukileyo eyenzelwe umsebenzi othile. Ezona zixhaphakileyo zezokuqala/ukumisa ukuhamba (iivalvu zebhola) kunye nokuthintela ngokuzenzekelayo ukuhamba okungasemva (jonga iivalvu).

Ukucinga ukuba zonke iivalvu zePVC ziyafana yimpazamo eqhelekileyo. Enyanisweni, inxalenye "yePVC" ichaza nje izinto ezenziwe ngazo iivalvu—iplastiki eqinileyo nengangeni mvuthuluka. Ingxenye "yevalvu" ichaza umsebenzi wayo. Ukuze sincede uBudi kunye neqela lakhe bakhokele abathengi babo, sibahlulahlula ngomsebenzi wabo oyintloko. Olu hlu lulula lunceda wonke umntu ukuba akhethe imveliso efanelekileyo ngokuzithemba.

Nantsi inkcazo esisiseko yeentlobo eziqhelekileyo oza kudibana nazo kulawulo lwamanzi:

Ziziphi iintlobo ezine zePVC?

Ubona iilebhile ezahlukeneyo ezifana ne-PVC-U kunye ne-C-PVC uze uzibuze ukuba zibalulekile na. Ukusebenzisa ivalvu eqhelekileyo kumgca wamanzi ashushu kuba ungayazi umahluko kunokubangela ukungaphumeleli okukhulu.

Lo mbuzo umalunga nezinto zeplastiki, hayi uhlobo lwevalvu. Izinto ezine eziqhelekileyo zePVC-family yiPVC-U (esemgangathweni, yamanzi abandayo), iC-PVC (yamanzi ashushu), iPVC-O (enamandla aphezulu), kunye neM-PVC (eguqulweyo yimpembelelo).

Lo ngumbuzo omhle kakhulu kuba ufikelela kwisiseko somgangatho wemveliso kunye nokhuseleko lwesicelo. Kulula ukudibanisa iintlobo zeevalvu neentlobo zezinto. KwaPntek, sikholelwa ukuba iqabane elifundileyo liqabane eliphumelelayo, ngoko ke ukucacisa oku kubalulekile. Izinto ezenziwe ngazo iivalvu yakho zilawula imida yobushushu bayo, umlinganiselo woxinzelelo, kunye nokumelana neekhemikhali.

I-PVC-U (iPolyvinyl Chloride engafakwanga iplastiki)

Olu lolona hlobo luqhelekileyo lwe-PVC olusetyenziswa kwiipayipi, izixhobo, kunye neevalvu eMntla Melika, eYurophu nase-Asia. Luqinile, lunexabiso eliphantsi, kwaye lumelana kakhulu neekhemikhali ezahlukeneyo. Luyindlela eqhelekileyo yokusetyenziswa kwamanzi abandayo. Uninzi lweevalvu zethu zebhola zePntek kunye neevalvu zokujonga ezi-odolwa yiBudi zenziwe ngePVC-U yodidi oluphezulu.

I-C-PVC (i-Chlorinated Polyvinyl Chloride)

I-C-PVC idlula kwinkqubo eyongezelelweyo ye-chlorination. Olu tshintsho lulula luyandisa kakhulu ukumelana kwayo nobushushu. Nangona i-PVC-U ifanele isetyenziswe kuphela ukuya kuthi ga kwi-60°C (140°F), i-C-PVC inokumelana nobushushu ukuya kuthi ga kwi-93°C (200°F). Kufuneka usebenzise iivalvu ze-C-PVC kwiintambo zamanzi ashushu.

Ezinye Iintlobo

I-PVC-O (Esekelwe) kunye ne-M-PVC (Eguquliweyo) azixhaphakanga kakhulu kwiivalvu kodwa zixhaphake kakhulu kwiipayipi zoxinzelelo ezikhethekileyo, kodwa kulungile ukwazi ukuba zikhona. Zenzelwe amazinga aphezulu oxinzelelo kunye namandla angcono empembelelo.

Ziziphi iintlobo ezintandathu eziphambili zeevalvu?

Wakha inkqubo entsonkothileyo kwaye udinga okungaphezulu nje kwevalvu elula yokuvula/yokucima. Ukubona amagama anje “ngeGlobe” okanye “iSango” kunokudida ukuba usebenza kakhulu ngeevalvu zebhola zePVC.

Iintsapho ezintandathu ezisebenzayo zeevalvu ziivalvu zeBall, Gate, Globe, Check, Butterfly, kunye neDiaphragm. Uninzi lwazo lufumaneka kwiPVC ukuze kusetyenziswe apho iivalvu zesinyithi zingabola okanye zibize kakhulu.

Nangona sigxila kwiintlobo zePVC eziqhelekileyo, ukuqonda lonke usapho lweevalvu kukunceda wazi ukuba kutheni iivalvu ezithile zikhethwa kunezinye. Ezinye ziyimigangatho yoshishino, ngelixa ezinye zezemisebenzi ethile. Olu lwazi lubanzi lunceda iqela likaBudi ukuba liphendule nemibuzo yabathengi eneenkcukacha ezininzi.

Ulawulo lwamanzi ngokubanzi,iivalvu zebhola, iivalvu zokujongakunyeiivalvu zebhabhathanezezona ntlobo zePVC zibalulekileyo ekufuneka uzazi.

Ziziphi iintlobo ezahlukeneyo zeevalvu zokujonga zePVC?

Udinga ivalvu yokujonga ukuthintela ukubuya kwamanzi, kodwa ubona iindlela ezifana “nojingi,” “ibhola,” kunye “nentwasahlobo.” Ukufakela engalunganga kunokukhokelela ekungasebenzini, ihamile yamanzi, okanye ivalvu ingasebenzi konke konke.

Iintlobo eziphambili zeevalvu zokujonga zePVC kukujonga ukujika, ukujonga ibhola, kunye nokujonga intwasahlobo. Ngayinye isebenzisa indlela eyahlukileyo yokumisa ukuhamba okungasemva kwaye ifanelekile kwiindlela ezahlukeneyo zokujonga umbhobho kunye neemeko zokuhamba.

Ivalvu yokujonga yi-silent guardian yenkqubo yakho, esebenza ngokuzenzekelayo ngaphandle kweziphatho okanye amandla angaphandle. Kodwa ayizizo zonke ii-guardians ezisebenza ngendlela efanayo. Ukukhetha eyona ifanelekileyo kubalulekile ekukhuseleni ipompo kunye nokuthembeka kwenkqubo. Le yinkcukacha endihlala ndiyigxininisa kuBudi, njengoko ichaphazela ngokuthe ngqo ukuthembeka kwexesha elide kokufakwa kwabathengi bakhe.

I-PVC Swing Check Valve

Olu lolona hlobo lulula. Lune-hinged flap (okanye idiski) evulekayo xa amanzi ephuma. Xa amanzi ema okanye ebuyela umva, amandla ombane kunye noxinzelelo lwangasemva zijika i-flap ivaleke kwisihlalo sayo. Zisebenza kakuhle kwimibhobho ethe tye okanye kwimibhobho ethe nkqo enomoya onyukayo.

I-PVC Ball Check Valve

Le yeyona nto siyithandayo kwiPntek. Ibhola engqukuva ihleli kwigumbi. Ukuhamba phambili kutyhala ibhola iphume kwindlela yokuhamba. Xa ukuhamba kujika, kutyhala ibhola ibuyele esihlalweni, kwenze ukuba itywinwe kakuhle. Zithembeke kakhulu, zinokufakwa ngokuthe nkqo okanye ngokuthe tye, kwaye azinazo iihinji okanye izipilingi zokuguga.

I-PVC Spring Check Valve

Olu hlobo lusebenzisa isipilingi ukunceda ukuvala ivalvu ngokukhawuleza xa ukuhamba kwamanzi kuyeka. Olu nyathelo lokuvala ngokukhawuleza lufanelekile ekuthinteleni ihamile yamanzi—i-shockwave eyonakalisayo edalwa kukuyeka ukuhamba ngequbuliso. Zingafakwa kuyo nayiphi na indlela.

Isiphelo

Ukukhetha ivalvu yePVC efanelekileyo kuthetha ukuqonda uhlobo lwayo—ibhola yokulawula, ukujonga ukubuya kwayo—kunye nezinto zeplastiki ngokwazo. Olu lwazi luqinisekisa ukuthembeka kwenkqubo, luthintela ukungaphumeleli, kwaye lwakha ukuthembana kwabathengi.