Awọn ohun elo Ikole (Thermoplastics)

Awọn ohun elo Ikole (Thermoplastics): polymer® PTFE (Polytetrafluoroethylene), PVDF (Polyvinylidene Fluoride), PP (Polypropylene), CPVC (Chlorinated Polyvinyl Chloride), PVC (Polyvinyl Chloride)

​

PVC (Polyvinyl kiloraidi)

Aṣayan ti ọrọ-aje julọ ati ti o tobi julọ ti awọn falifu Chemline jẹ apẹrẹ lati PVC.O funni ni ẹrọ ti o dara julọ ati awọn ohun-ini resistance kemikali ni idiyele kekere.Iwọn otutu iṣẹ ti awọn falifu PVC jẹ 0 si 60 ° C (30 si 140 ° F).PVC ti a lo fun awọn falifu Chemline jẹ idanimọ nipasẹ nọmba iyasọtọ sẹẹli 11564-A gẹgẹbi ASTM Standard D 1784. Suffix “A” n tọka si idiyele resistance kemikali ti o ga julọ.Julọ miiran PVC falifu bi daradara bi paipu ati paipu ni nikan "B" kemikali resistance Rating.The pataki PVC "A" yellow lo ninu Chemline falifu koju kolu ti julọ acids, lagbara alkalais, iyọ ati ọpọlọpọ awọn miiran kemikali.Idaabobo kemikali giga ti ohun elo yii ngbanilaaye ohun elo rẹ lori awọn iṣẹ ibinu bii 98% H2 SO4, chlorine gbẹ ati gaasi chlorine tutu kekere titẹ.PVC ti kọlu nipasẹ awọn hydrocarbons chlorinated, ketones, esters ati diẹ ninu awọn agbo ogun oorun.O le ṣee lo lori awọn solusan ti o ni awọn nkan ti o to 1000 ppm.Chemline PVC falifu kii ṣe majele.Wọn pade CSA boṣewa B137.0 fun toxicity.Wọn jẹ sooro si awọn ipa ti o bajẹ ti oorun ati oju ojo, nitorinaa kikun ko ṣe pataki.

CPVC (Chlorinated Polyvinyl Chloride)

CPVC jẹ iru pupọ si PVC ni awọn ohun-ini ẹrọ ati resistance kemikali.O dara fun awọn ohun elo lati 0 si 95 ° C (30 si 200 ° F) .Apapọ CPVC pataki ti a lo fun awọn falifu Chemline ti wa ni ipin bi 23567-A gẹgẹbi ASTM D 1784. Suffix "A" n tọka si ibamu si kemikali ti o ga julọ. resistance Rating.Apapọ naa kii ṣe majele, ni ibamu si awọn falifu majele ti CSA B137.0.CPVC ti fihan lati jẹ yiyan ti o tayọ fun awọn ohun elo ni awọn iwọn otutu ti o ga julọ fun PVC tabi nigbati o nilo ala afikun ti ailewu.

PP (Polypropylene)

PP jẹ iwuwo ina ati giga ni resistance kemikali.Awọn falifu dara fun iṣẹ lati -20 si 90°C (-5° si 195°F).PP ko ni ipa nipasẹ awọn alkalais, iyọ, awọn nkan ti ara ati awọn acids pupọ julọ, paapaa hydrochloric ati phosphoric acid.Ko ṣe deede lori awọn acids ti o lagbara, awọn hydrocarbons chlorinated, awọn agbo ogun aromatic ati awọn ifọkansi giga ti chlorine ọfẹ.PP jẹ inert pupọ nitorinaa olokiki fun awọn ohun elo mimọ giga gẹgẹbi omi ti a ti sọ diionized, bbl Ohun elo naa wa ni deede opaqued nipasẹ afikun ti awọ-awọ-awọ-awọ lati dena. ultraviolet ina ilaluja.Ohun elo translucent adayeba laisi pigmenti yoo dinku ti o ba farahan si ina UV (ina oorun).Chemline nfunni ni paipu PP, awọn ohun elo ati awọn falifu ni awọ ati PP ti ko ni awọ, mejeeji fọwọsi nipasẹ FDA fun olubasọrọ pẹlu ounjẹ.

PVDF (Polyvinylidene fluoride)

PVDF ga ju awọn thermoplastics valve miiran ni resistance kemikali ati abrasion resistance.O ni agbara iyalẹnu lori iwọn otutu iṣẹ ti o tobi julọ.Iwọn iwọn otutu ti n ṣiṣẹ ti awọn falifu PVDF jẹ -40 si 120 ° C (-40 si 250 ° F) . Agbara ipa PVDF ti kọja lẹmeji ti PVC.Awọn falifu naa jẹ pipẹ pupọ labẹ ilokulo ẹrọ paapaa ni -40°F.Wọn tun funni ni resistance abrasion ti o ga julọ ti awọn valves thermoplastic.PVDF ni o ni resistance kemikali ti o dara julọ si awọn halogens bii chlorine ati bromine, awọn acids ti o lagbara bi hydrofluoric ati nitric acids, awọn olomi Organic ati awọn epo.PVDF ko ni sooro si awọn ipilẹ gbigbona.O tun kii ṣe majele ti ko funni ni oorun tabi awọn itọwo sinu omi.PVDF wa ni ibamu pẹlu Akọle USDA 21, awọn ibeere P121.2593 fun olubasọrọ pẹlu ounjẹ.Gas permeability ti PVDF jẹ lalailopinpin kekere.Itọsi PVDF gaasi idena idena wa lori Iru 14 ati DV Series Diaphragm Valves.O jẹ atilẹyin si polymer® diaphragm ati ti fihan lati mu igbesi aye awọn falifu diaphragm pọ si lori chlorine ati awọn iṣẹ acid to lagbara.

polymer® PTFE (Polytetrafluoroethylene)

PTFE fẹrẹẹ jẹ airotẹlẹ patapata ati inert kemikali.O ni o ni ga otutu resistance.Awọn ijoko bọọlu polymer® PTFE, nitori lubricity adayeba, ko nilo lubrication.polymer® PTFE diaphragms ati flange gaskets ti wa ni lilo ninu awọn julọ àìdá kemikali resistance ohun elo.