Naluphi na uphendlo olukhawulezileyo lwevalvu kwi-intanethi luya kubonisa iziphumo ezininzi ezahlukeneyo: ngesandla okanye ngokuzenzekelayo, ithusi okanye intsimbi engatyiwayo, iflange okanye i-NPT, iqhekeza elinye, iziqwenga ezimbini okanye ezintathu, njalo njalo. Njengoko kukho iintlobo ezininzi ezahlukeneyo zeevalvu onokukhetha kuzo, ungaqiniseka njani ukuba uthenga uhlobo olufanelekileyo? Nangona isicelo sakho siya kukunceda ekukhetheni iivalvu ngokufanelekileyo, kubalulekile ukuba nolwazi olusisiseko ngeentlobo ezahlukeneyo zeevalvu ezinikezelwayo.

Ivalvu yebhola eneqhekeza elinye inomzimba oqinileyo onciphisa umngcipheko wokuvuza. Zixabiso eliphantsi kwaye zihlala zingalungiswa.

Iivalvu zebhola ezineziqwenga ezimbini zezinye zezona zisetyenziswa kakhuluiivalvu zebholaNjengoko igama lisitsho, ivalvu yebhola enamacandelo amabini ineziqwenga ezibini, isiqwenga esinomgca oqhagamshelwe kwelinye icala kunye nomzimba wevalvu. Isiqwenga sesibini singena phezu kwesiqwenga sokuqala, sibambe umsonto endaweni yawo kwaye siquka uqhagamshelo lwesibini. Nje ukuba zifakwe, ezi valve ngokubanzi azinakulungiswa ngaphandle kokuba zisusiwe kwinkonzo.

Kwakhona, njengoko igama lisitsho, ivalvu yebhola enamacandelo amathathu inamacandelo amathathu: iziphelo ezimbini kunye nomzimba. Iziphelo zihlala zifakelwa imisonto okanye zifakwe kwipayipi, kwaye inxalenye yomzimba ingasuswa lula ukuze icocwe okanye ilungiswe ngaphandle kokususa isiphelo. Oku kungaba lukhetho oluxabisekileyo kuba kuthintela umgca wemveliso ukuba uvalwe xa kufuneka ukulungiswa.

Ngokuthelekisa iimpawu zevalvu nganye neemfuno zesicelo sakho, uya kukwazi ukwenza isigqibo esinolwazi esifanela iimfuno zakho. Ndwendwela iwebhusayithi yethu yevalvu ukuze ufunde ngomgca wemveliso yethu yevalvu yebhola okanye uqale ukumisela namhlanje.

Ukuvezwa yi-UV
MhlopheUmbhobho wePVC,uhlobo olusetyenziselwa imibhobho, luyawohloka xa luvezwa kukukhanya kwe-UV, njengakwilanga. Oku kwenza ukuba izinto zingafaneleki ukusetyenziswa ngaphandle apho zingagqunywa khona, njengeepali zeflegi kunye nokusetyenziswa kophahla. Ekuhambeni kwexesha, ukuvezwa kwe-UV kunciphisa ukuguquguquka kwezinto ngokuwohloka kwe-polymer, okunokukhokelela ekuqhekekeni, ekuqhekekeni, nasekuqhekekeni.

ubushushu obuphantsi
Njengoko ubushushu buhla, i-PVC iba buthathaka ngakumbi nangakumbi. Xa ibekwe kumaqondo obushushu abandayo ixesha elide, iba buthathaka kwaye iqhekeke lula. I-PVC ayifanelekanga ukusetyenziswa phantsi kwamaqondo obushushu ahlala ebanda, kwaye amanzi akufuneki aqine ngaphakathi.Imibhobho yePVCkuba inokubangela ukuqhekeka nokugqabhuka.

ubudala
Zonke iipolymers okanye iiplastiki ziyawohloka ukuya kwinqanaba elithile ngokuhamba kwexesha. Yimveliso yokwakheka kweekhemikhali zazo. Ekuhambeni kwexesha, i-PVC ifunxa izinto ezibizwa ngokuba ziiplasticizers. Iiplasticizers zongezwa kwi-PVC ngexesha lokwenziwa ukuze zonyuse ukuguquguquka kwayo. Xa ziphuma kwiipayipi ze-PVC, iipayipi aziguquguquki kangako ngenxa yokungabikho kwazo, kodwa zikwashiywa neziphene ngenxa yokungabikho kweemolekyuli zeplasticizer, ezinokubangela imingxunya okanye iimfanta kwiipayipi.

ukuvezwa kwiikhemikhali
Iipayipi zePVC zinokuba buthathaka ngenxa yokuvezwa ziikhemikhali. Njengepolymer, iikhemikhali zinokuba nefuthe elibi kakhulu kwindlela eyenziwe ngayo iPVC, zikhulule iibhondi phakathi kweemolekyuli kwiplastiki kwaye zikhawulezise ukufuduka kweeplastiki eziphuma kwiipayipi. Iipayipi zePVC zinokuba buthathaka xa zivezwa kwiikhemikhali ezininzi, ezifana nezo zifumaneka kwiiplagi zedrain yolwelo.