Mea Faufale (Thermoplastics): polymer® PTFE (Polytetrafluoroethylene),PVDF (Polyvinylidene Fluoride),PP (Polypropylene),CPVC (Chlorinated Polyvinyl Chloride),PVC (Polyvinyl Chloride)
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PVC (Polyvinyl Chloride)
Ole sili ona taugofie ma sili ona tele filifiliga ole Chemline valve e faʻapipiʻiina mai le PVC.E ofoina atu mea fa'ainisinia ma vaila'au fa'atosina lelei ile tau maualalo.Ole fua ole vevela ole galuega ole PVC valve e 0 ile 60°C (30 i le 140°F).O le PVC faʻaaogaina mo vaʻa Chemline o loʻo faʻaalia i le numera o le faʻavasegaina o le cell 11564-A e pei o le ASTM Standard D 1784. O le suffix "A" e faʻatatau i le maualuga o le faʻasologa o vailaʻau.O le tele o isi valve PVC faʻapea foʻi ma paipa ma mea faʻapipiʻi e naʻo le "B" faʻataʻitaʻiina o vailaʻau.O le maualuga o vailaʻau faʻasaina o lenei mea e mafai ai ona faʻaogaina i luga o auaunaga faʻamalosi e pei o le 98% H2 SO4, chlorine mago ma le maualalo o le mamafa susu chlorine gas.O le PVC e osofa'ia e le chlorinated hydrocarbons, ketones, esters ma nisi o mea manogi.E mafai ona faʻaaogaina i fofo o loʻo i ai e oʻo atu i le 1000 ppm solvents. Chemline PVC valves e le oona.Latou te ausia le CSA standard B137.0 mo le oona. Latou te teteʻe i aʻafiaga leaga o le susulu o le la ma le tau, o lea e le manaʻomia ai le valiina.
CPVC (Chlorinated Polyvinyl Chloride)
CPVC e tutusa lelei ma le PVC i mea faʻainisinia ma vailaʻau faʻamalosi.E talafeagai mo talosaga mai le 0 i le 95 ° C (30 i le 200 ° F) .O le faʻapitoa CPVC faʻaogaina mo valves Chemline o loʻo faʻavasegaina i le 23567-A e pei o le ASTM D 1784. O le suffix "A" o loʻo faʻaalia ai le fetaui ma le vailaʻau maualuga. fua faatatau tetee.O le tuufaatasiga e le oona, e tusa ai ma le CSA toxicity standard B137.0.CPVC valves ua faʻamaonia e avea o se filifiliga sili ona lelei mo talosaga i le vevela maualuga tele mo PVC poʻo pe a manaʻomia se faʻaopoopoga o le saogalemu.
PP (Polypropylene)
O le PP e mama le mamafa ma maualuga i vailaʻau.Valves e talafeagai mo le tautua mai le -20 i le 90 ° C (-5 ° i le 195 ° F).O le PP e le afaina i alkalais, salts, solvents organic ma le tele o acids, aemaise lava hydrochloric ma phosphoric acid.E le talafeagai i luga o acids malosi, chlorinated hydrocarbons, mea manogi ma maualuga concentrations o free chlorine.PP e matua inert lea lauiloa mo talosaga mama maualuga e pei o vai deionized, ma isi mea e sau masani opaqued e faaopoopo i le lanu efuefu-beige e puipuia. fa'aogaina o le malamalama ultraviolet.O mea fa'alenatura fa'alenatura e aunoa ma se pa'u o le a fa'aleagaina pe a fa'aalia i le malamalama UV (malamalama o le la).O Chemline e ofoina atu le paipa PP, mea faʻapipiʻi ma valve i le PP pigmented ma unpigmented, faʻamaonia uma e le FDA mo le faʻafesoʻotaʻi ma meaʻai.
PVDF (Polyvinylidene Fluoride)
PVDF e sili atu i isi valve thermoplastics i vailaʻau faʻamalosi ma abrasion teteʻe.O lo'o i ai le malosi fa'apitoa i luga o le tele o le vevela galue.Ole fua ole vevela galue ole PVDF valve o le -40 i le 120 ° C (-40 i le 250 ° F) .PVDF's aafiaga malosi e sili atu i le faaluaina o le PVC.O alatoto e matua tumau lava i lalo o le faʻaaogaina o masini e oʻo lava ile -40°F.Latou te ofoina atu foi le maualuga o le abrasion teteʻe o valves thermoplastic.PVDF e sili atu vailaʻau tetee faasaga i halogens e pei o le chlorine ma bromine, acids malosi e pei o hydrofluoric ma nitric acids, solvents organic ma suauu.O le PVDF e le fa'asalaina i fa'avae vevela. E le o'ona ma e leai se manogi po'o se tofo i totonu o le vai.O la matou PVDF e ogatasi ma le USDA Title 21, P121.2593 mana'oga mo le fa'afeso'ota'i ma mea'ai.O le fa'aogaina o le kesi o le PVDF e matua maualalo lava.O lo'o maua se pateni pateni kasa PVDF i luga ole Type 14 ma le DV Series Diaphragm Valves.O se lagolago i le polymer® diaphragm ma ua faʻamaonia le faʻateleina o le ola o valve diaphragm i luga o le chlorine ma le malosi o le acid.
polymer® PTFE (Polytetrafluoroethylene)
O le PTFE e toetoe lava a matua le mafai ona faʻaaogaina ma faʻainisinia.E maualuga le tete'e o le vevela.polymer® PTFE nofoa polo, ona o le lubricity masani, e le manaʻomia le lubrication.polymer® PTFE diaphragms ma flange gaskets o loʻo faʻaaogaina i faʻaoga sili ona ogaoga o le tetee atu i vailaʻau.
Taimi meli: Me-11-2017