Zvishandiso zvekuvaka (Thermoplastics)

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

.

PVC (Polyvinyl Chloride)

Iyo yakanyanya hupfumi uye yakakura kusarudzwa kweChemline mavharuvhu akaumbwa kubva kuPVC.Iyo inopa yakanakisa mechanic uye makemikari kuramba zvivakwa pamutengo wakaderera.Iyo tembiricha yekushanda yePVC mavharuvhu ndeye 0 kusvika 60 ° C (30 kusvika 140 ° F).PVC inoshandiswa kuChemline mavharuvhu inotaridzwa necell classification nhamba 11564-A maererano neASTM Standard D 1784. Chivakashure "A" chinoreva chepamusoro chemakemikari kuramba.Mazhinji mamwe mavharuvhu ePVC pamwe chete nepombi uye mafittings ane chete "B" kemikari kuramba rating.Iyo yakakosha PVC "A" komputa inoshandiswa muChemline mavharuvhu inoramba kurwiswa kweakawanda acids, yakasimba alkalais, munyu uye mamwe makemikari mazhinji.Kupikisa kwemakemikari echinyorwa ichi kunobvumira kushandiswa kwayo pamasevhisi ane hutsinye akadai se98% H2 SO4, yakaoma chlorine uye yakaderera kunyorova wet chlorine gasi.PVC inorwiswa nema chlorinated hydrocarbons, ketones, esters uye mamwe macompound anonhuwirira.Inogona kushandiswa pazvigadziriso zvine zvinonyungudutsa 1000 ppm. Chemline PVC mavharuvhu haana chepfu.Vanosangana neCSA yakajairwa B137.0 ye toxicity.Vanoshingirira kune zvinokuvadza zvinokonzerwa nechiedza chezuva uye mamiriro ekunze, saka kupenda hazvidiwi.

CPVC (Chlorinated Polyvinyl Chloride)

CPVC yakafanana chaizvo nePVC mune zvemakanika zvivakwa uye makemikari kuramba.Inokodzera kushandiswa kubva ku0 kusvika 95 ° C (30 kusvika 200 ° F) .Iyo yakakosha CPVC compound inoshandiswa kuChemline valves inorongwa se 23567-A maererano neASTM D 1784. Chivakashure "A" chinoreva kuenderana nekemikari yepamusoro. kupikisa rating.Mushonga wacho hausi muchetura, unoenderana neCSA toxicity standard B137.0.CPVC mavharuvhu aratidza kuva sarudzo yakanakisa yekushandiswa patembiricha yakanyanyisa kukwira kuPVC kana kana imwe muganho wekuchengetedza ichidikanwa.

PP (Polypropylene)

PP uremu huremu uye yakakwirira mukupikisa kwemakemikari.Mavharuvhu akakodzera kushanda kubva -20 kusvika 90°C (-5° kusvika 195°F).PP haina kukanganiswa nealkalais, munyu, organic solvents uye akawanda acids, kunyanya hydrochloric uye phosphoric acid.Haikodzeri pane yakasimba acids, chlorinated hydrocarbons, zvinonhuhwirira zvinonhuhwirira uye yakakwira yakawandisa yemahara chlorine.PP inonyanya inert saka yakakurumbira kune yakakwirira kuchena maapplication akadai semvura yakasvibiswa, nezvimwewo. Nyaya yacho inouya yakajairika nekuwedzera kwegrey-beige pigment kudzivirira. ultraviolet chiedza kupinda.Zvinhu zvakasikwa zvinopenya zvisina pigment zvinoshatisa kana zvakafumurwa kune UV mwenje (zuva mwenje).Chemline inopa PP pombi, zvigadziriso uye mavharuvhu mune pigmented uye isina pigmented PP, ese akatenderwa neFDA kuti abatane nechikafu.

PVDF (Polyvinylidene Fluoride)

PVDF yakakwirira kune mamwe mavharuvhu thermoplastics mumakemikari kuramba uye abrasion kuramba.Iine simba rinoshamisa pamusoro pehukuru hwekushanda tembiricha.Tembiricha yekushanda yemavharuvhu ePVDF ndeye -40 kusvika 120°C (-40 kusvika 250°F).Simba rePVDF rinopeta zvakapetwa kaviri pane rePVC.Mavharuvhu akasimba zvakanyanya pasi pekushungurudzwa kwemuchina kunyangwe pa -40 ° F.Vanopawo yakanyanya abrasion resistance ye thermoplastic valves.PVDF ine yakanakisa kemikari kurwisa halogens se chlorine nebromine, yakasimba acids senge hydrofluoric uye nitric acids, organic solvents nemafuta.PVDF haidziviriri pazvigadziko zvinopisa. Haina chepfu uye haina kunhuwa kana kuravira mumvura.PVDF yedu inoenderana neUSDA Title 21, P121.2593 zvinodiwa pakubata nechikafu.Gasi permeability yePVDF yakadzikira zvakanyanya.A patented PVDF gasi permeability barriers inowanikwa paType 14 uye DV Series Diaphragm Mavharuvhu.Iyo inotsigira ku polymer® diaphragm uye yakaratidza kuwedzera hupenyu hwe diaphragm mavharuvhu pa chlorine uye yakasimba acid masevhisi.

polymer® PTFE (Polytetrafluoroethylene)

PTFE inenge isina kunyungudika zvachose uye inert yemakemikari.Iine high temperature resistance.polymer® PTFE zvigaro zvebhora, nekuda kwekunaka kwechisikigo, hazvidi mafuta.polymer® PTFE diaphragms uye flange gaskets anoshandiswa mune yakanyanya kuomarara makemikari kuramba maapplication.