Nakuba kungase kubonakale njengemininingwane encane, impahla ye-valve ye-O-ring ibaluleke kakhulu.Indaba inganquma ukubekezelelana kwezinga lokushisa kwe-seal.Iphinde inikeze uphawu oluthile ukumelana namakhemikhali, kanti ezinye izinhlobo zenjoloba ziyahambisana noketshezi oluhlukene.Izinto ezimbili ezivamile zama-valve ebhola lezinyunyana yi-Viton ne-EPDM.

I-Viton (esithombeni kwesokudla) iyirabha yokwenziwa enamakhemikhali aphezulu kanye nokumelana nezinga lokushisa.I-EPDM imele i-Ethylene Propylene Diene Monomer futhi inesethi yayo yezinto eziyenza ibe yinto ethandwa kakhulu ye-O-ring.Uma uqhathanisa i-Viton ne-EPDM, izici eziningana okufanele zicatshangelwe: ukubekezelela izinga lokushisa, ukuhambisana kwamakhemikhali, kanye nezindleko.Funda ukuze uthole isiqhathaniso esigcwele.

Izimpawu zenjoloba ze-EPDM
Irabha ye-EPDM (Irabha ye-EPDM) iyirabha eyinkimbinkimbi futhi engabizi enezinhlobonhlobo zokusetshenziswa.Ngokuvamile isetshenziselwa ukuvimbela amanzi ophahleni ngoba i-EPDM ivala kahle.Kuphinde kube yinto evamile yezigxivizo zefriji ngoba iyisivikeli mandla futhi inokumelana nezinga lokushisa eliphansi kakhulu.Ngokukhethekile, i-EPDM isebenza ngempumelelo ebangeni lokushisa elingu--49F ukuya ku-293F (-45C ukuya ku-145C), iyenze ifanelekele izinhlelo zokusebenza kunoma yikuphi ukushisa.

Nakuba amarabha amaningi ekwazi ukumelana nokushisa okuphezulu, ambalwa kuphela angakwazi ukuphatha amazinga okushisa aphansi njenge-EPDM.Lokhu kwenza kube yinketho yokuqala kunoma ngubani ozama ukuvala ezindaweni ezibandayo noma ngezinto ezibandayo.True Union Ball Valves ngeI-EPDM Evaliwe O-RingsIzicelo ezijwayelekile ze-EPDM zifaka ukufakwa kukagesi, ama-pool linings, amapayipi amanzi, abaqoqi bephaneli yelanga, ama-O-rings, nokunye.

Ngaphezu kokubekezelela okukhulu kwezinga lokushisa, i-EPDM inokumelana namakhemikhali okubanzi.Lokhu kufaka phakathi amanzi ashisayo, umusi, okokuhlanza, izixazululo ze-potash e-caustic, izixazululo ze-sodium hydroxide, uwoyela we-silicone / amafutha, namanye ama-asidi namakhemikhali amaningi ahlanjululwe.Ayifanele ukusetshenziswa nemikhiqizo kawoyela wamaminerali njengamafutha okugcoba, uwoyela noma izibaseli.Ukuze uthole ukuhambisana kwamakhemikhali okuthile kwe-EPDM, chofoza lapha.Lezi zakhiwo ezihlaba umxhwele, ezihlanganiswe nentengo ephansi, zenza i-EPDM ibe yinto ethandwa kakhulu yokuvala uphawu.

Izimpawu ze-Viton
IViton iyirabha yokwenziwa kanye ne-fluoropolymer elastomer."I-Fluoropolymer" isho ukuthi le nto inokumelana okuphezulu nezincibilikisi, ama-asidi nezisekelo.Igama elithi “elastomer” ngokuyisisekelo lishintshashintsha nelithi “irabha”.Ngeke sixoxe ngomehluko phakathi kwe-elastomer nerabha lapha, kodwa sizoxoxa ngokuthi yini eyenza i-Viton ikhetheke kangaka.Izinto ezisetshenziswayo zivame ukubonakala ngombala oluhlaza noma onsundu, kodwa okuwuhlukanisa ngempela ukuminyana kwawo.Ukuminyana kwe-Viton kuphakeme kakhulu kunezinhlobo eziningi zenjoloba, okwenza uphawu lwe-Viton lube olunye oluqine kakhulu.

I-Viton inebanga elibanzi lokubekezelela izinga lokushisa ukusuka ku -4F kuya ku-410F (-20C kuya ku-210C).Amazinga okushisa aphezulu i-Viton ekwazi ukumelana nawo ayenza ifaneleke ezinhlelweni zokushisa eziphezulu.I-Viton ivame ukusetshenziswa kuma-O-rings, amagilavu ​​angamelana namakhemikhali neminye imikhiqizo ebunjiwe noma ekhishwe.Ama-O-rings enziwe nge-Viton mahle kakhulu ekujuleni kwe-scuba, izinjini zezimoto nama-valve ahlukahlukene.

Uma kukhulunywa ngokumelana namakhemikhali, iViton ayifani.Imelana nokugqwala okuvela oketshezini olubanzi olubanzi namakhemikhali kunanoma iyiphi i-elastomer engeyona i-fluorinated.Ngokungafani ne-EPDM, i-Viton ihambisana namafutha, amafutha, izinto zokuthambisa kanye nama-acid amaningi angaphili.Iphinde imelane ngokwedlulele nokucindezelwa, i-atmospheric oxidation, ukukhanya kwelanga, isimo sezulu, amafutha emoto anomoya-mpilo, ama-aromatics, isikhunta, isikhunta, nokuningi.Iyakwazi futhi ukumelana nokushiswa kunamanye amarabha amaningi.Funda kabanzi mayelana nokwenza nokungamelwe kwenziwe ngamakhemikhali e-Viton.

Inkinga enkulu ngeViton yintengo yayo.Ekukhiqizeni, kubiza cishe izikhathi eziyisi-8 ukwenza inani lezinto ezibonakalayo njenge-EPDM.Uma uthenga umkhiqizo oqukethe inani elincane kuphela lalezi zinto zenjoloba, intengo ingase ingahlukani kakhulu.Kodwa uma u-oda ngamanani amakhulu, ungalindela ukuthi izingxenye ze-Viton zibiza kakhulu kune-EPDM.

Izimpawu ze-Viton kanye ne-EPDM
I-Viton vs EPDM Ishadi Lerabha Lokufaka uphawu

Ngakho iyiphi impahla engcono kakhulu?Le mibuzo ayilungile neze.Zombili izinto ezisetshenziswayo zinezinhlelo zokusebenza ezithile lapho zilungele khona, ngakho konke kuncike emsebenzini ezizowenza.UC wethuI-PVC Ball Check Valveskanye nama-CPVC Swing Check Valves ayatholakala ngama-Viton seal noma ama-EPDM seal.Lezi zimpawu zenziwe ngama-O-rings afakwe ezintweni ezifakiwe.Lawa ma-valve wonke aklanyelwe ukuba ahlakazwe kalula ukuze anakekeleke kalula, ngakho anemizimba ekhishwayo.

Uma udinga i-valve yesistimu yamanzi, kungakhathaliseki izinga lokushisa, i-valve ene-EPDM seal ngokuvamile iyisinqumo esingcono kakhulu.Ngaphandle kokubekezelela okuhlukile kwezinga lokushisa, umehluko omkhulu phakathi kwezinto ezimbili ukumelana kwazo namakhemikhali.I-Viton ilungele ukusetshenziswa nophethiloli nezinye izinto ezigqwala, kodwa uma usebenza nento engenabungozi njengamanzi, lokhu kuqina okweqile akudingekile.