Iivalvu zebhola zePVC (PolyVinyl Chloride) zisetyenziswa ngokubanzi iivalvu zeplastiki ezivalayo.Ivalve iqulethe ibhola ejikelezayo enebhore.Ngokujikelezisa ibhola kwikota yokujika, ibhore ingaphakathi okanye i-perpendicular kumbhobho kwaye ukuhamba kuyavulwa okanye kuvaliwe.Iivalvu zePVC zomelele kwaye ziyonga imali.Ngapha koko, zinokusetyenziselwa iintlobo ngeentlobo zemithombo yeendaba, kubandakanya amanzi, umoya, iikhemikhali ezonakalisayo, iiasidi kunye neziseko.Xa kuthelekiswa nobhedu okanye iivalve zebhola zensimbi ezingenasici, zilinganiswe ngamaqondo okushisa aphantsi kunye noxinzelelo kwaye zinamandla aphantsi omatshini.Zifumaneka ngeendlela ezahlukeneyo zokudityaniswa kwemibhobho, njengeesokethi zokunyibilikisa (uxhulumaniso lweglue) okanye imicu yombhobho.Umanyano oluphindiweyo, okanye iivalvu zenyani zomanyano, zineziphelo zoqhagamshelo lombhobho ezahlukileyo ezidityaniswe kumzimba wevalvu ngoqhagamshelo olunentambo.Ivalve inokususwa ngokulula ukwenzela ukutshintshwa, ukuhlolwa nokucoca.
Imveliso yePolyVinyl Chloride
I-PVC imele iPolyVinyl Chloride kwaye iyeyesithathu ipholima yokwenziwa esetyenziswa kakhulu emva kwePE nePP.Iveliswa yi-reaction ye-57% yegesi ye-chlorine kunye ne-43% yegesi ye-ethylene.Irhasi yeklorini ithathwa yi-electrolysis yamanzi olwandle, kwaye igesi ye-ethylene ifunyanwa ngokukhutshwa kweoli ekrwada.Xa kuthelekiswa nezinye iiplastiki, imveliso ye-PVC idinga i-oyile ekrwada engaphantsi kakhulu (i-PE kunye ne-PP ifuna malunga ne-97% yegesi ye-ethylene).Iklorini kunye ne-ethylene zisabela kwaye zenze i-ethanedichlorine.Oku kusetyenzwa ukuvelisa iVinylchlorine monoma.Esi sixhobo sipolymerized ukwenza iPVC.Ekugqibeleni, ezinye izongezo zisetyenziselwa ukuguqula iimpawu ezinjengokuqina kunye nokuqina.Ngenxa yenkqubo yokuvelisa elula kunye nokufumaneka okukhulu kwezinto eziluhlaza, i-PVC yindleko-esebenzayo kwaye ihambelana nezinto ezizinzileyo xa kuthelekiswa nezinye iiplastiki.I-PVC inamandla okumelana nokukhanya kwelanga, iikhemikhali kunye ne-oxidation emanzini.
Iimpawu zePVC
Uluhlu olungezantsi lunika isishwankathelo jikelele seempawu ezibalulekileyo zemathiriyeli:
- Ikhaphukhaphu, inamandla kunye nobomi benkonzo ende
- Ilungele ukurisayikilishwa kunye neempembelelo eziphantsi kakhulu kokusingqongileyo xa kuthelekiswa nezinye iiplastiki
- Idla ngokusetyenziswa kwizicelo zococeko, ezifana namanzi okusela.I-PVC yinto ebalulekileyo esetyenziselwa ukugcina okanye ukuhambisa iimveliso zokutya.
- Ukumelana neekhemikhali ezininzi, iiasidi kunye neziseko
- Uninzi lwee-valve zebhola ze-PVC ukuya kwi-DN50 zinezinga eliphezulu loxinzelelo lwe-PN16 (i-16 bar kwindawo yokushisa).
I-PVC ineendawo zokuthambisa ezisezantsi nezinyibilikayo.Ngoko ke, akukhuthazwa ukusebenzisa iPVC kumaqondo obushushu angaphezu kwama-60 ngokukaCelsius (140°F).
Usetyenziso
Iivalvu zePVC zisetyenziswa ngamandla kulawulo lwamanzi kunye nokunkcenkceshela.I-PVC ikwafanelekile kwimithombo yeendaba ezonakalisayo, njengamanzi olwandle.Ngaphezu koko, izinto eziphathekayo zixhathisa kwii-asidi ezininzi kunye neziseko, izisombululo zetyuwa kunye nezinyibilikisi eziphilayo.Kwizicelo apho kusetyenziswa iikhemikhali ezonakalisayo kunye ne-asidi, i-PVC ke ngoko ihlala ikhethwa ngaphezu kwentsimbi engenasici.I-PVC inezinye izinto ezingeloncedo.Eyona nto ibalulekileyo i-drawback kukuba i-PVC eqhelekileyo ayinakusetyenziselwa amaqondo obushushu emidiya ngaphezu kwe-60 ° C (140 ° F).I-PVC ayixhathisi kwi-hydrocarbons enevumba elimnandi kunye neklorini.I-PVC inamandla angaphantsi komatshini kunobhedu okanye insimbi engenasici, ngoko ke iivalve ze-PVC zihlala zinezinga eliphantsi loxinzelelo (i-PN16 iqhelekile kwiivalvu ukuya kwi-DN50).Uluhlu lweemarike eziqhelekileyo apho iivalvu zePVC zisetyenziswa:
- Ukunkcenkceshela kwasekhaya / kubuchwephesha
- Unyango lwamanzi
- Iimpawu zamanzi kunye nemithombo
- Aquariums
- Iindawo zokulahla inkunkuma
- Amadama okuqubha
- Ukulungiswa kweekhemikhali
- Ukulungiswa kokutya
Ixesha lokuposa: May-30-2020