Polytetrafluoroethylene.

PTFE iroroshye gutemba no kunyerera munsi yumuvuduko nubushyuhe bwinshi, kubwibyo ikoreshwa muri rusange kumuvuduko muke, ubushyuhe buciriritse, kwangirika gukomeye kandi ntibemerera kwanduza imiti, nka aside ikomeye, alkali, halogene, imiti nibindi. . Ubushyuhe bwo gukora neza ni 150 ℃ kandi umuvuduko uri munsi ya 1MPa. Imbaraga zuzuye za PTFE ziziyongera, ariko gukoresha ubushyuhe ntibishobora kurenga 200 ℃, bitabaye ibyo kurwanya ruswa bizagabanuka. Umubare ntarengwa wo gukoresha igitutu cya PTFE mubusanzwe ntabwo urenze 2MPa.

Bitewe n'ubwiyongere bw'ubushyuhe, ibikoresho bizanyerera, bigatuma igabanuka ryinshi rya kashe. Nubwo ubushyuhe bukwiye, hamwe no kwongerera igihe, guhangayikishwa no hejuru yikidodo bizagabanuka, bikavamo "ibintu byo guhagarika umutima". Iyi phenomenon izagaragara muburyo bwose bwa gasketi, ariko kuruhuka guhangayikishije padi ya PTFE birakomeye, kandi bigomba kuba maso.

Coefficient de fraisation ya PTFE ni nto (guhagarika umutima birenze 4MPa, coefficient de fraisation ni 0.035 ~ 0.04), kandi gasike iroroshye kunyerera hanze iyo ibanziriza gukomera, nibyiza rero gukoresha hejuru ya flange ya convex na convex. Niba flange iringaniye ikoreshwa, diameter yinyuma ya gaze irashobora guhuzwa na bolt kugirango birinde gasike kunyerera hanze.

Kubera ko ibikoresho byo gutondekamo ibirahure byacumuye nyuma yo gutera igiti cya emam hejuru yicyuma, igipande cya glaze kiravunika cyane, kijyanye no gutera hamwe hamwe no gutembera neza, ubuso bwa flange burakennye. Icyuma gikomatanya icyuma cyoroshye kwangiza glaze, bityo rero birasabwa gukoresha ibikoresho byingenzi bikozwe mu kibaho cya asibesitosi no gupakira reberi PTFE. Gupakira biroroshye guhuza na flange hejuru kandi birwanya ruswa, kandi ingaruka zo gukoresha ni nziza.

Hano hari inganda nyinshi mubushuhe, igitutu ntikiri hejuru muburyo bukomeye bwo kwangirika, gukoresha plaque ya asibesitosi ya reberi yapfunyitse umukandara wibikoresho bya PTFE, kubisanzwe byasenyutse, imiyoboro. Kuberako umusaruro no gukoresha biroroshye cyane, bizwi cyane.