Yakakwira temp PTFE gasket kusimba? 

Ngativei chaivo, kana mumwe munhu akabvunza nezve yakakwirira temp PTFE gasket kusimba, ivo vanowanzo ratidza mashiripiti chisimbiso chinobata 500 ° F zvachose. Ndiyo nzvimbo yekutanga yatinosvika. PTFE yakanaka, asi yakakwirira tembiricha ine hukama, uye kusimba kunoenderana nezvauri kukumbira kuti iite. Iko kuenderera mberi nekupisa bhasikoro here? Pane kuratidzwa kwemakemikari pamusoro pekupisa here? Kana kuti inongova static, inopisa flange? Mhinduro inoshandura zvese.

Iyo Yepamusoro Temp Misconception uye Material Reality

Yakachena PTFE inotanga kunyura zvakanyanya pamusoro pe400°F (yakatenderedza 204°C). Iwe unogona kuwana madheti anoti anoshanda kusvika 500 ° F (260 ° C), uye nehunyanzvi, haizonyungudika nekukurumidza. Asi pamiganhu iyoyo yepamusoro, maitiro ayo emuviri anopfava. Iyo gasket inogona kutonhora kuyerera, zvichireva kuti inokanganisa zvishoma nezvishoma pasi pemutoro webhaudhi, zvichitungamira kukuzorora kwekushushikana uye pakupedzisira kuvuza. Saka, kusimba pa250 ° C mubvunzo wenguva uye kumanikidzwa, kwete nyore hongu / kwete.

Ndinoyeuka chirongwa chiri pamutsetse wekemikari unocheneswa nepfuti. Tembiricha yaizokwira kusvika 230°C kwenguva pfupi. Takashandisa a PTFE gasket, uye yakashanda… kweinenge mwedzi mitatu. Ipapo mvura yaibva yatanga pamaburi emabhaudhi. Nyaya yanga isiri iyo tembiricha yepamusoro sese, asi kudzokororwa kwemafuta anodzokororwa akasanganiswa nekutenderera kweflange panguva yebholting. Nyaya yacho yakarasikirwa nekusimba kwayo.

Ndosaka akazadzwa PTFE mamakisi achipinda mukutamba. Zvishandiso zvakaita segirazi-yakazadzwa kana kabhoni-yakazadzwa PTFE inovandudza creep kuramba zvakanyanya. Ivo vanogona kubata yakakwira michina mitoro pane tembiricha yakakwira, ichiwedzera hupenyu hwesevhisi. Asi kunyangwe zvakadaro, iwe unotengeserana imwe yakachena yePTFE's superb chemical resistance. Nguva dzose kubvumirana.

Kukundikana Modes Iwe Unongodzidza Nekuona

Kupfuura zvinokambaira, muurayi mukuru kudzikiswa kwemafuta. Kuratidzwa kwenguva refu kumucheto wepamusoro wehutanho hwekushisa kunoita kuti PTFE iite brittle. Hainyungudi; inotanga kutsemuka, kunyanya panguva yekuvhara kana zvinhu zvatonhora. Iwe uchawana gasket rakapwanyika kuita zvidimbu kana iwe ukavhura flange.

Imwe pfungwa yakavanzika ndeye flange pamusoro pekupedzisira. Pamasevhisi ekupisa kwepamusoro, kupera kweserrated kunogona kutsanangurwa kuitira kuruma kuri nani. Asi nechinhu chakapfava sePTFE, iwo serrations anogona kucheka mukati me gasket nekufamba kwenguva, kunyanya panguva yekupisa kwekuwedzera / kutenderera kutenderera. Ndashandura kune spiral-ronda gasket ne PTFE filler yezviitiko zvakadaro, apo simbi inotenderera inotora mechanical bite, uye PTFE inopa chisimbiso. Zvirinani durability.

Pressure ndiyo imwe hafu ye equation. Iyo yakakwirira-yekupisa, yakaderera-inotsikirira mutsara inogona kurega PTFE gasket makore apfuura. Iyo tembiricha imwechete ine yakanyanya kumanikidza yemukati, kunyanya kana iri cyclic, inopfupisa hupenyu hwayo zvakanyanya. Mutoro uri pachiso che gasket unogara uchichinja, uchishanda zvinhu.

Inoshanda Sarudzo uye Kuisa Pitfalls

Gasket ukobvu kunokosha kupfuura kufunga kwevanhu. Kune ma-high-temp apps, ini ndinowanzoenda mutete. Iyo 1.5mm gasket ine zvinhu zvishoma zvekukambaira uye kukanganisa pane imwe 3mm imwe. Inodawo yakakwira bhaudhi kusungira chisimbiso pakutanga, izvo zvinotungamira kune inotevera yakakosha chinhu: bholting maitiro.

Kana iwe ukasawana bhaudhi mutoro kubva pakutanga, kanganwa nezve kwenguva refu high temp performance. Under-torquing, uye chisimbiso chekutanga chakashata. Kuwedzeredza-torquing, uye iwe wakamanikidza iyo PTFE kupfuura kupora, kukurumidza kukwira. Kushandisa calibrated torque wrench uye yakakodzera muchinjikwa-pattern tightening kutevedzana haisi tsika yakanaka chete; ndiwo musiyano pakati pegasket inogara gore rimwe kana matatu.

Takadzidza izvi nenzira yakaoma pabhangi rezvinopisa kupisa. Chikwata chekugadzirisa chakashandisa zvipanera zvekukanganisa kumhanya. Iwo gaskets (akasimbiswa PTFE rudzi) akaputika mukati memavhiki ekusvika tembiricha yekushandisa. Kusaenzana, mutoro wakawandisa wakagadzira nzvimbo dzekushushikana kuti kupisa kwakapera.

Nguva Yokuishandisa uye Nguva Yekufamba

Saka, ndepapi yakakwira temp PTFE gasket ine musoro? Nekuenderera mberi sevhisi, ndingangwarire pamusoro pe200 ° C kunze kwekunge iri giredhi rakazadzwa uye kudzvanywa kwakadzikira. Nzvimbo yayo inotapira iri mukuora sevhisi uko tembiricha iri pakati nepakati asi makemikari anobvisa akawanda elastomers. Semuenzaniso, hova dzeasidhi inopisa pa150-180 ° C.

Kune chokwadi chepamusoro-tembiricha, high-pressure flanges, senge mukugadzira simba, uri kutarisa graphite, spiral-ronda, kana mhete-mhando majoini. PTFE haisiriye mutambi ipapo. Ndakaona fungidziro kubva kumafemu einjiniya anodaidza PTFE nekusaita corrosion pamutsara we280 ° C, uye inzira yekudzima. Iwe unofanirwa kusundira kumashure nemiganhu yezvinhu.

Dzimwe nguva, mhinduro inoturikidzana. Purojekiti yandakashanda nemutengesi se Handan Zitai Fastener Kugadzira Co, Ltd. (ivo vanogara muYongnian, iyo hombe yekusimbisa hub muHebei, unogona kuvawana pa zitafasteners.com) inosanganisa kwete gasket chete asi iyo yese bolting system. Taida mabhoti ane simba-akakwirira aigona kuchengetedza mutoro pakupisa kuchengetedza PTFE gasket kushanda. Ihurongwa, kwete chikamu chega.

Maonero eNguva Yakareba uye Dzimwe nzira

Durability ndeyekupedzisira mutengo wakakwana. Iyo yakachipa PTFE gasket iyo inokundikana mumwedzi mitanhatu inodhura zvakanyanya mukushanda uye kuderera pane inodhura spiral-ronda gasket inotora makore mashanu. Iwe unofanirwa kutarisa muhurongwa hwekugadzirisa uye kukosha kwemutsara.

Nezvekutsiva mumaflange aripo, gara uchiyera gap patembiricha yekushandisa kana uchikwanisa. Old flanges warp. Iyo gasket yaunoisa inotonhora inofanirwa kuvhara kupisa, mune yakakanganiswa geometry. Dzimwe nguva, sarudzo yakasimba ndeyekugadzirisa flange kutanga.

Mukupedzisira, kupindura kunokumanikidza kubvunza gumi nemaviri mimwe mibvunzo. Chii chaicho chimiro chekushisa? Chii chinonzi medium? Chii chinonzi flange mamiriro uye bolting? Iko hakuna mhinduro imwechete, ingori seti yekutengeserana-offs yakavakirwa pane ruzivo-uye dzimwe nguva, pakutadza kwakapfuura. Chinangwa hachisi nokusingaperi; ndezvenguva inofanotaurwa, yakavimbika sevhisi nguva yaunogona kuronga uchitenderedza. Uye nekuda kweizvozvo, kunzwisisa izvo zvinhu-yepasirese miganhu ndicho chete chinhu chinoshanda.