Indlela yokukhetha ivalve yebhabhathane elungileyo?

Ivalve yeplastiki yebhabhathane sisixhobo esiqhelekileyo sokulawula ulwelo, esisetyenziswa kakhulu kushishino, ulwakhiwo kunye nezolimo. Kukho UPVC CPVC PPH PVDF PPH impahla butterfly valve. Umqheba lever butterfly ubukhulu ziquka DN50, DN65 DN80, DN100, DN 200, The worm geared butterfly valve ziquka DN50 ~DN300. Ineengenelo zesakhiwo esilula, ukusebenza ngokulula kunye nokuxhathisa umhlwa, ngoko ke ithandwa kakhulu ngabasebenzisi. Nangona kunjalo, xa kuthengwa i-valve ye-butterfly yeplastiki, kufuneka siqwalasele izinto ezibalulekileyo. Eli nqaku liza kukunika isikhokelo sokukhetha ivalve yebhabhathane yeplastiki ukukunceda ukhethe imveliso elungileyo.

1, Ukuhambelana kweMichiza:

Qinisekisa iikhemikhali ezithile okanye ulwelo oluya kuboniswa ivelufa. Khetha imathiriyeli yeplastiki kumzimba wevalvu kunye namalungu amelana kakhulu neziphumo ezinobungozi zeekhemikhali. Iiplastiki ezahlukeneyo zinemigangatho eyahlukeneyo yokuchasana neekhemikhali ezahlukeneyo, ngoko ke ukuthelekisa izinto kunye neempawu ezithile zeekhemikhali kubalulekile.

2, Khetha imathiriyeli efanelekileyo:

Iivalve ze-butterfly zeplastiki zenziwe ngezinto ezahlukeneyo, eziqhelekileyo ezifumaneka kwi-PVC (i-polyvinyl chloride), i-CPVC (i-polyvinyl chloride eyi-chlorinated), i-PP (i-polypropylene), i-PVDF (i-polyvinylidene fluoride) kunye ne-PTFE (i-polytetrafluoroethylene), njl njl. iimpawu zokusebenza ezahlukeneyo, ngoko ke kufuneka ukhethe izinto ezifanelekileyo ngokweemfuno ezithile. Ngokuqhelekileyo, i-polypropylene ifanelekile kwi-medium general, i-PVC ifanelekile kwi-asidi ebuthakathaka kunye ne-alkali medium, i-PTFE ifanelekile kwi-asidi eqinile kunye ne-alkali medium, kunye ne-FRP ifanelekile kwi-high-higher medium.

xa ukhetha i-PVC, i-CPVC, i-PP okanye i-PVDF i-butterfly valves kwizicelo ezahlukeneyo zeekhemikhali, kubalulekile ukuqwalasela ukuhambelana kweekhemikhali kwento nganye. Ezi zilandelayo zizikhokelo ngokubanzi zokuhambelana kwezi zinto kunye neekhemikhali ezahlukeneyo:

Ivalve yebhabhathane yePVC (ipolyvinyl chloride):

Ifanelekile ukunyanga amanzi, i-asidi (i-dilute), i-alkali kunye nezisombululo zetyuwa.

Akukhuthazwa ukuba kusetyenziswe iiasidi ezinamandla, iiketoni, ii-esters kunye ne-aromatics okanye i-chlorinated hydrocarbons.

I-CPVC (i-polyvinyl chloride enechlorine) ivelufa yebhabhathane:

Ukumelana noluhlu olubanzi lweekhemikhali kunePVC, kubandakanywa ulwelo olutshisayo, iityuwa, kunye neeasidi ezininzi kunye neealkali.

Akukhuthazwa ukuba kusetyenziswe izinyibilikisi zepolar, iihydrocarbons ezinevumba elimnandi kunye neehydrocarbon ezikloriniwe.

Ivalve yebhabhathane yePP (polypropylene):

Ukumelana neentlobo ezahlukeneyo ze-asidi, i-alkali kunye ne-solvents eziphilayo.

Ayikhuthazwa ukuba isetyenziswe kunye ne-oxidizing acids eyomeleleyo, i-hydrocarbons e-chlorinated, i-aromatics kunye ne-halogenated hydrocarbons.

Ivalve yebhabhathane iPVDF (ipolyvinylidene fluoride):

Ukumelana kakhulu noluhlu olubanzi lweekhemikhali ezidliwayo, kubandakanywa i-acids eqinile, iziseko kunye ne-halogenated solvents.

Ifanelekile ukuphatha iikhemikhali ezonakalisayo kunye nezicelo zokucoceka okuphezulu.

Qinisekisa ukuba ujongana neetshathi zokuhambelana kweekhemikhali kunye namaphepha athile edatha yedatha ukuze uqinisekise ukhetho oluchanekileyo lwe-PVC, i-CPVC, i-PP okanye i-PVDF i-butterfly valves kwiinkqubo ezahlukeneyo zeekhemikhali. Ukongeza, qwalasela ubushushu kunye neemeko zoxinzelelo kunye nemigangatho yolawulo kunye neshishini xa usenza ukhetho lwakho.

3. Nika ingqalelo kwisakhiwo somzimba wevalvu:

Isakhiwo somzimba wevalve yebhabhathane yeplastiki yenye yezinto ekufuneka ziqwalaselwe xa kuthengwa. Ulwakhiwo lomzimba wevalve eqhelekileyo lunodidi lweflange, uhlobo oluphothiweyo kunye nohlobo oludityanisiweyo. Umzimba wevalve ene-Flanged ulungele idiameter enkulu kunye nezihlandlo zoxinzelelo oluphezulu, umzimba wevalve ephothiweyo ufanelekile kwidayamitha encinci kunye nezihlandlo zoxinzelelo oluphantsi, umzimba wevalve odityanisiweyo ulungele ubushushu obuphezulu kunye nezihlandlo zoxinzelelo oluphezulu. Ngoko ke, kufuneka ukhethe isakhiwo somzimba we-valve esifanelekileyo ngokwemeko yangempela xa kuthengwa.

4. Nika ingqalelo kwizinto zokuhlala:

Isihlalo sevalve siyinxalenye ebalulekileyo yevalve yebhabhathane yeplastiki, echaphazela ngokuthe ngqo ukusebenza kokutywinwa kwevalve. Izinto zokuhlala eziqhelekileyo zevalve ziquka i-EPDM (i-ethylene propylene diene monomer), i-Buna-N (i-rubber ye-nitrile), i-fluoroelastomer (i-FKM, i-FPM, i-VITON), i-PTFE kunye ne-polyurethane. I-FKM, iFPM, iVITON inobuqhophololo obuhle kunye nokuxhathisa ukukrala, i-PTFE inomhlwa obalaseleyo kunye nokumelana nobushushu obuphezulu, kwaye i-polyurethane inokugrumba okulungileyo kunye nokumelana ne-oyile. .

Ezi zixhobo zikhethwe ngenxa yokukwazi ukubonelela ngetywina eliqinileyo, ukunyanzeliswa kokugqoka, kunye nokuhambelana nobuninzi bamanzi kunye namaqondo okushisa. Izinto ezithile ezisetyenziselwa izihlalo zevalve yebhabhathane zeplastiki zixhomekeke kwisicelo, uhlobo lolwelo olulawulwayo, kunye neemeko zokusebenza.

Xa uthenga, kufuneka ukhethe izinto ezifanelekileyo zokuhlala kwi-valve ngokweempawu ze-medium

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5, Amanqaku oxinzelelo kunye nobushushu:

Khetha iivalve ezinokusingatha uxinzelelo lokusebenza kunye neemeko zokushisa ngaphakathi kwenkqubo ukuqinisekisa ukusebenza okukhuselekileyo nokuthembekileyo.

Igama leplastiki ekrwada kunye nobushushu obusebenzayo:

6, Ubungakanani kunye nokuHamba:

Khetha ubungakanani bevalvu kunye nokuhamba okuhambelana neemfuno zesixokelelwano ukufezekisa ulawulo olufunekayo lokuhamba.

7. Qwalasela imo yokusebenza:

Iivalvu zebhabhathane zePlastiki zisebenza ngesandla, ngombane nangomoya. Ukusebenza ngesandla kulula, indleko ephantsi, ifanelekile kwiinkqubo ezincinci; ukusebenza kombane kukulungele, ukuchaneka okuphezulu, okufanelekileyo kwiinkqubo ezinkulu; ukusebenza kwe-pneumatic kukhawuleza, iqondo eliphezulu lokuzenzekelayo, lilungele iinkqubo ezifuna ukutshintsha rhoqo. Ngoko ke, ekuthengeni imfuno yokukhetha indlela efanelekileyo yokusebenza ngokweemfuno zangempela.

8. Nika ingqalelo kwimigangatho yesivalo kunye nesiqinisekiso:

Ekuthengeni i-valve ye-butterfly yeplastiki, kufuneka kwakhona uqaphele ukuba i-valve ihlangabezana nemigangatho efanelekileyo kunye neemfuno zokuqinisekisa. Imigangatho eqhelekileyo kunye neziqinisekiso yi-ISO, CE, API njalo njalo. Ukukhetha iimveliso ezihlangabezana nemigangatho kunye neemfuno zesiqinisekiso kunokuqinisekisa umgangatho kunye nokhuseleko lwemveliso.

Ngokuqwalasela ngokucophelela le miba, unokukhetha i-valve ye-butterfly yeplastiki efanelekileyo yokuphatha iikhemikhali ezahlukeneyo, ukuqinisekisa ukhuseleko, ukuthembeka kunye nokuphila ixesha elide kwisicelo sakho.