Zida Zomangamanga (Thermoplastics)

Zida Zomangamanga (Thermoplastics):polymer® PTFE (Polytetrafluoroethylene),PVDF (Polyvinylidene Fluoride),PP (Polypropylene),CPVC (Chlorinated Polyvinyl Chloride),PVC (Polyvinyl Chloride)

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PVC (Polyvinyl Chloride)

Zosankha zotsika mtengo komanso zazikulu kwambiri zama valve a Chemline amapangidwa kuchokera ku PVC.Amapereka zinthu zabwino kwambiri zamakina ndi mankhwala pamtengo wotsika.Kutentha kogwira ntchito kwa ma valve a PVC ndi 0 mpaka 60 ° C (30 mpaka 140 ° F).PVC yogwiritsidwa ntchito pa ma valve a Chemline imadziwika ndi chiwerengero cha maselo 11564-A malinga ndi ASTM Standard D 1784. Chokwanira "A" chimatanthawuza chiwerengero chapamwamba kwambiri cha mankhwala.Ma valve ena ambiri a PVC komanso chitoliro ndi zopangira zimakhala ndi "B" kokha kukana kwa mankhwala.Chigawo chapadera cha PVC "A" chomwe chimagwiritsidwa ntchito mu ma valve a Chemline chimatsutsa kuukira kwa asidi ambiri, alkalais amphamvu, mchere ndi mankhwala ena ambiri.High mankhwala kukana za nkhaniyi amalola ntchito zake pa mautumiki aukali monga 98% H2 SO4 , youma klorini ndi otsika kuthamanga yonyowa chlorine mpweya.PVC imawukiridwa ndi ma hydrocarboni a klorini, ma ketoni, esters ndi mankhwala ena onunkhira.Ikhoza kugwiritsidwa ntchito pazitsulo zomwe zili ndi solvents mpaka 1000 ppm. Mavavu a Chemline PVC alibe poizoni.Amakumana ndi CSA muyezo wa B137.0 wa toxicity. Iwo amalimbana ndi zotsatira zowononga za kuwala kwa dzuwa ndi nyengo, motero kujambula sikofunikira.

CPVC (Chlorinated Polyvinyl Chloride)

CPVC ndi yofanana kwambiri ndi PVC muzochita zamakina komanso kukana mankhwala.Ndizoyenera kugwiritsa ntchito kuchokera ku 0 mpaka 95 ° C (30 mpaka 200 ° F) .Chigawo chapadera cha CPVC chomwe chimagwiritsidwa ntchito pa ma valve a Chemline amatchulidwa kuti ndi 23567-A monga ASTM D 1784. Chowonjezera "A" chimatanthauza kugwirizana ndi mankhwala apamwamba kwambiri. kukana mlingo.Pagululi si poizoni, mogwirizana ndi CSA toxicity standard B137.0.CPVC mavavu atsimikizira kuti ndi abwino kusankha ntchito pa kutentha kwambiri kwa PVC kapena pamene malire owonjezera a chitetezo akufunika.

PP (Polypropylene)

PP ndi kulemera kopepuka komanso kukana kwa mankhwala.Mavavu ndi oyenera kutumikira kuyambira -20 mpaka 90°C (-5° mpaka 195°F).PP sichikhudzidwa ndi alkalais, mchere, zosungunulira zamoyo ndi ma asidi ambiri, makamaka hydrochloric ndi phosphoric acid.Ndizosayenera pa ma asidi amphamvu, ma chlorinated hydrocarbons, zosakaniza zonunkhira komanso kuchuluka kwa chlorine yaulere.PP ndi inert kwambiri motero imatchuka chifukwa cha chiyero chapamwamba monga madzi opangidwa ndi deionized, ndi zina zambiri. Zinthuzi zimabwera nthawi zambiri osawoneka bwino powonjezera mtundu wa imvi-beige kuteteza. kuwala kwa ultraviolet kulowa.Zinthu zachilengedwe zowoneka bwino popanda pigment zimatha kuwonongeka ngati zitakhala ndi kuwala kwa UV (kuwala kwadzuwa).Chemline imapereka chitoliro cha PP, zopangira ndi mavavu mu PP ya pigmented ndi yopanda pigmented, zonse zovomerezedwa ndi FDA kuti zigwirizane ndi chakudya.

PVDF (Polyvinylidene Fluoride)

PVDF ndiyabwino kuposa ma valve thermoplastics ena polimbana ndi mankhwala komanso kukana abrasion.Ili ndi mphamvu yodabwitsa kuposa momwe kutentha kumagwirira ntchito.Kutentha kogwira ntchito kwa mavavu a PVDF ndi -40 mpaka 120°C (-40 mpaka 250°F). Mphamvu zamphamvu za PVDF zimaposa kuwirikiza kawiri kuposa PVC.Ma valve ndi olimba kwambiri pozunzidwa ndi makina ngakhale pa -40 ° F.Amaperekanso kukana kwapamwamba kwambiri kwa ma valve a thermoplastic.PVDF ili ndi mankhwala abwino kwambiri olimbana ndi ma halogen monga chlorine ndi bromine, ma asidi amphamvu monga hydrofluoric ndi nitric acid, organic solvents ndi mafuta.PVDF imalimbana ndi zinthu zotentha ndipo ilibe poizoni ndipo siipereka fungo kapena kukoma mu madzimadzi.PVDF yathu ikugwirizana ndi USDA Title 21, P121.2593 zofunika pa kukhudzana ndi chakudya.Mpweya wa mpweya wa PVDF ndiwotsika kwambiri.Chotchinga chotchinga mpweya cha PVDF chopezeka pamtundu wa 14 ndi DV Series Diaphragm Valves.Ndizothandizira ku polymer® diaphragm ndipo zatsimikizira kukulitsa moyo wa mavavu a diaphragm pa chlorine ndi ntchito za asidi amphamvu.

polymer® PTFE (Polytetrafluoroethylene)

PTFE ndi pafupifupi kwathunthu osasungunuka ndi mankhwala inert.Ili ndi kutentha kwakukulu.mipando ya mpira ya polymer® PTFE, chifukwa chamafuta achilengedwe, imasowa mafuta.polymer® PTFE diaphragms ndi flange gaskets ntchito kwambiri mankhwala kukana ntchito.