Ihe eji arụ ọrụ (Thermoplastics)

Ihe eji arụ ọrụ (Thermoplastics): polymer® PTFE (Polytetrafluoroethylene), PVDF (Polyvinylidene Fluoride), PP (Polypropylene), CPVC (Chlorinated Polyvinyl Chloride), PVC (Polyvinyl Chloride)

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Polyvinyl chloride (PVC)

Nhọrọ kachasị ọnụ ahịa na nke kachasị ukwuu nke valvụ Chemline bụ nke emere site na PVC.Ọ na-enye ndị magburu onwe n'ibu na chemical iguzogide Njirimara na ọnụ ala.Igwe ọkụ na-arụ ọrụ nke valves PVC bụ 0 ruo 60 ° C (30 ruo 140 ° F).A na-amata PVC eji eme valvụ Chemline site na nọmba nhazi ọkwa cell 11564-A dị ka ASTM Standard D 1784. Mgbakwunye "A" na-ezo aka na ọkwa nguzogide kemịkalụ kachasị elu.Ọtụtụ valvụ PVC ndị ọzọ yana ọkpọkọ na ihe ndozi nwere naanị ọkwa nguzogide kemịkalụ "B". Ihe pụrụ iche PVC "A" a na-eji na valvụ Chemline na-eguzogide ọgụ nke ọtụtụ acid, alkalais siri ike, nnu na ọtụtụ kemịkalụ ndị ọzọ.Nguzogide kemịkalụ dị elu nke ihe a na-enye ohere itinye ya na ọrụ ike ike dị ka 98% H2 SO4, chlorine akọrọ na obere ikuku chlorine mmiri.A na-awakpo PVC site na chlorinated hydrocarbons, ketones, esters na ụfọdụ ogige aromatic.Enwere ike iji ya mee ihe na ngwọta nwere ihe ruru 1000 ppm solvents.Chemline PVC valves adịghị egbu egbu.Ha na-ezute ọkọlọtọ CSA B137.0 maka toxicity. Ha na-eguzogide ọgwụ na-emebi mmetụta nke ìhè anyanwụ na ihu igwe, ya mere eserese adịghị mkpa.

Polyvinyl chloride chlorinated (CPVC)

CPVC yiri nnọọ PVC na n'ibu Njirimara na chemical iguzogide.Ọ dị mma maka ngwa sitere na 0 ruo 95 ° C (30 ruo 200 ° F) . Ngwakọta CPVC pụrụ iche a na-eji valvụ Chemline bụ 23567-A dị ka ASTM D 1784. Mgbakwunye "A" na-egosi nkwenye na kemịkalụ kachasị elu. ọkwa nguzogide.Ngwakọta ahụ adịghị egbu egbu, na-agbaso ụkpụrụ CSA toxicity ọkọlọtọ B137.0.CPVC valves egosila na ọ bụ nhọrọ magburu onwe ya maka ngwa na okpomọkụ dị elu maka PVC ma ọ bụ mgbe achọrọ oke nchekwa.

Polypropylene (PP)

PP dị arọ ma dị elu na nguzogide kemịkalụ.Valves dabara adaba maka ọrụ site na -20 ruo 90°C (-5° ruo 195°F).PP adịghị emetụta alkalais, salts, organic solvents na ọtụtụ acid, karịsịa hydrochloric na phosphoric acid.Ọ bụ ekwesighi na ike acids, chlorinated hydrocarbons, aromatic ogige na elu ịta nke free chlorine.PP bụ nnọọ inert otú a na-ewu ewu maka elu ịdị ọcha ngwa dị ka deionized mmiri, wdg The ihe na-abịa na-ejikarị opaqued site na mgbakwunye na nke isi awọ-agba aja pigmenti iji gbochie. ultraviolet ìhè ntinye.Ihe translucent eke na-enweghị pigmenti ga-emebi ma ọ bụrụ na ekpughere ya na ìhè UV (ìhè anyanwụ).Chemline na-enye ọkpọkọ PP, ihe nrụnye na valvụ na PP nwere pigmenti na enweghị pigmenti, nke FDA kwadoro maka ịkpọtụrụ nri.

Polyvinylidene Fluoride (PVDF)

PVDF dị elu karịa valvụ thermoplastics ndị ọzọ na nguzogide kemịkalụ na nguzogide abrasion.Ọ nwere ike dị ịrịba ama karịa oke okpomọkụ na-arụ ọrụ.Ọnọdụ okpomọkụ na-arụ ọrụ nke valvụ PVDF bụ -40 ruo 120 ° C (-40 ruo 250 ° F) ike mmetụta PVDF karịrị okpukpu abụọ nke PVC.Valvụ ndị ahụ na-adịte aka nke ukwuu n'okpuru arụrụ arụ ọrụ ọbụlagodi na -40ºF.Ha na-enyekwa nguzogide abrasion kachasị elu nke valves thermoplastic.PVDF nwere ezigbo nguzogide kemịkalụ megide halogens dị ka chlorine na bromine, acid siri ike dị ka hydrofluoric na acid nitric, organic solvents na mmanụ.PVDF anaghị eguzogide ihe ndabere na-ekpo ọkụ. Ọ dịghịkwa egbu egbu ma ọ dịghị enye ísì ma ọ bụ ụtọ n'ime mmiri.PVDF anyị kwekọrọ na USDA Mbụ 21, P121.2593 chọrọ maka ịkpọtụrụ nri.Ike ikuku nke PVDF dị oke ala.Ihe mgbochi PVDF gas nwere ikike dị na Ụdị 14 na DV Series Diaphragm Valves.Ọ bụ nkwado na polymer® diaphragm ma gosi na ọ na-abawanye ndụ nke valves diaphragm na chlorine na ọrụ acid siri ike.

Polytetrafluoroethylene PTFE (Polymer® PTFE)

PTFE fọrọ nke nta ka ọ bụrụ nke a na-apụghị ịsotu n'otu na kemịkalụ inert.Ọ nwere oke okpomọkụ na-eguzogide.oche bọọlụ polymer® PTFE, n'ihi mmanu eke, achọghị mmanu mmanu.A na-eji polymer® PTFE diaphragms na flange gaskets na ngwa nguzogide kemịkalụ kacha njọ.