EPDM gasket: dorewa aikace-aikacen masana'antu? 

Kuna jin gasket na EPDM da dorewa a cikin numfashi ɗaya, kuma amsawar gaggawa a wasu da'irori wani ɗan wasa ne. Tunanin yana tafiya: roba ce ta roba, wacce aka samo ta daga sinadarai na petrochemicals, to yaya za a iya dorewa da gaske? Wannan shine matakin da ake ɗauka, kuma ya rasa duk tarihin rayuwa mai aiki. Bayan da aka ƙayyade da kuma ganin waɗannan hatimai sun kasa kuma sun yi nasara a filin, hujjar dorewa ba game da asalin albarkatun kasa ba ne kawai - yana da game da tsawon rai, riƙewar makamashi, da rage yawan maye gurbin. Idan gasket yana da shekaru 15 maimakon 5, wannan babban raguwar sharar gida ne, raguwar lokaci, da kuzarin da ke tattare da masana'antu da shigarwa. Daga nan ne ainihin zance ya fara.

Ƙimar Ƙarfafawa: Fiye da Juriya na Yanayi kawai

Kowa ya san dabarar jam'iyyar EPDM: fitaccen juriya ga ozone, UV, da yanayin yanayi. Littafin karatu kenan. Amma nasara mai ɗorewa ta zo daga abin da wannan juriya ke bayarwa a cikin ainihin, saitunan masana'antu masu banƙyama. Ina magana ne game da hawan keke mai zafi a cikin bututun dumama gundumomi, ko kuma daɗaɗɗen daɗaɗɗa a cikin filayen hasumiya mai sanyaya. A cikin wani aikin sake gyarawa don bututun mai na masana'antar sinadarai na tsakiyar ƙarni, mun fitar da cakudar tsofuwar neoprene da hatimin nitrile don EPDM. Abubuwan da suka gabata sun kasance suna ƙasƙanta kowane shekaru 3-4, wanda ke haifar da ɗigon tururi da zagayen kulawa akai-akai. EPDM da muka saka a ciki? Muna bin su, kuma ba sa nuna wani muhimmin saitin matsawa ko fashewar saman bayan shekaru 8. Cikakkun zagayowar kulawa biyu kenan da aka kauce. Sharar da aka samu daga tsofaffin gaskets-wanda galibi gurɓatacce ne kuma ba za a iya sake yin amfani da su ba-kawai an daina haifar da su.

Wannan tsawon rai yana fassara kai tsaye zuwa adana albarkatu. Ba koyaushe kuke cinye sabbin albarkatun ƙasa ba, kuzari don samarwa, ko mai don kayan aiki don jigilar kayan maye. Na tuna wata muhawara tare da manajan sayayya wanda aka mayar da hankali kawai akan farashin kowane raka'a. Zaɓin EPDM ya kasance 30% mafi tsada a gaba. Dole ne mu gina shari'ar da ke nuna jimillar kuɗin mallakar, gami da aiki don ƙarin rufewa biyu da asarar ruwa daga ɗigogi. Lokacin da aka tsara shi azaman a aikace-aikacen masana'antu mai dorewa, hangen nesa na dogon lokaci ya ci nasara. Yana da aiki, ba falsafa ba, dorewa.

Akwai gargadi, ba shakka. Wannan dorewa yana dogara ne akan zaɓin da ya dace. EPDM sanannen matalauci ne tare da mafi yawan mai da ruwaye na tushen mai. Na ga ya gaza da sauri da sauri a cikin layin canja wurin man shafawa inda wani ya zaci robar roba ne. Wannan gazawar ba alama ce ta dorewar EPDM ba; ya kasance alamar rashin aikin injiniya mara kyau. Aikace-aikace mai dorewa shine aikace-aikacen daidai.

Amfanin Makamashi: Haɗin Insulation

Wannan ƙaramin fili ne amma kusurwa mai mahimmanci. A cikin HVAC da tsarin rufin masana'antu, gasket wani ɓangare ne na ambulaf ɗin thermal. Hatimin da aka daidaita yana kaiwa zuwa gadar zafi da asarar kuzari. Tsayayyen tsarin polymer na EPDM da ƙarancin ƙarancin zafin jiki ya sa ya zama kyakkyawan zaɓi don rufe hatimin jaket, fale-falen shiga akan tukunyar jirgi, ko flanges na ductwork. Mun yi aiki a kan haɓaka makamashi na harabar jami'a inda suke neman rage kashi 10% na asarar shukar dumama. Wani muhimmin sashi na binciken ya yi nuni ga rugujewar hatimai akan ɗaruruwan tashoshin dubawa. Ƙayyade rufaffiyar tantanin halitta EPDM kumfa gas a nan ya yi abubuwa biyu: ya ƙirƙiri shingen iska abin dogaro, kuma abubuwan da ke rufe kayan sun ƙara ƙarin ƙimar R. An ƙididdige kuɗin da aka biya a cikin watanni, ba shekaru ba, akan tanadin makamashi kawai. Wannan shine dorewar aiki tare da ma'aunin kuɗi kai tsaye.

Ba kawai game da kiyaye zafi ba. A cikin firiji da ajiyar sanyi, hana dumi, shigar da iska mai laushi shine komai. Lamarin shiga ya tilasta tsarin yin aiki tuƙuru, yana cin ƙarin wutar lantarki, kuma yana iya haifar da samuwar ƙanƙara. Gaskat EPDM mai juriya, ƙarancin zafin jiki mai sauƙi a hatimin ƙofa daidai ne ga dalili. Na kwatanta shigarwa ta amfani da hatimin PVC na gaba da EPDM mai dacewa. Ƙofofin EPDM sun kiyaye daidaitaccen hatimi na tsawon tsayi, tare da ƙarancin daidaitawa da ake buƙata. Lissafin makamashi sun nuna bambanci mai ban mamaki a cikin mitar zagayowar kwampreso. Wannan shine nau'in nau'in granular, tasiri mai aunawa wanda ke bayyana dorewar zahirin duniya.

Kalubalen Da'ira da Ƙarshen Rayuwa ta Gaskiya

Bari mu fashe: labarin ƙarshen rayuwa ga yawancin gaskets na EPDM ba madauwari ba ne. Su kayan aikin thermoset ne. Ba za ku iya narke su ba kuma ku gyara su kamar thermoplastic. A mafi yawan abubuwan cirewar masana'antu, ana cika su ko kuma an ƙone su don dawo da makamashi. Wannan shi ne mafi girman ma'anar da'awar dorewa, kuma yana da inganci. Amsar masana'antar ba ta sake yin amfani da gaskat ɗin da aka yi amfani da ita ba, amma a cikin ƙira don tsayin daka, kamar yadda aka tattauna, da kuma bincika abubuwan da aka sake fa'ida a cikin kera sabbin mahadi na EPDM.

Wasu mahadi yanzu suna ba da maki EPDM tare da mahimman abubuwan EPDM da aka sake fa'ida bayan masana'antu. Ba daga tsofaffin gaskets ba, yawanci, amma daga sharar datti a lokacin samar da yanayin yanayi na mota ko rufin rufin. Wannan yana rufe madauki a cikin yanayin yanayin masana'antu. Mun gwada wasu daga cikin waɗannan kayan daga mai siyarwa a lardin Hebei, babbar cibiyar masana'antu, kuma raguwar aikin na iya zama kaɗan don aikace-aikacen rufewa da yawa. Mataki ne. Don kamfani kamar Hannun Zetai Mretering co., Ltd., wanda ke cikin tsakiyar cibiyar samar da daidaitattun sassa na kasar Sin a Yongnian, samun damar yin amfani da irin wadannan magudanan ruwa da dabaru don shigar da su cikin majalissar fastener da rufewa babban fa'ida ce. Matsayin su kusa da manyan hanyoyin jigilar kayayyaki kamar titin jirgin kasa na Beijing-Guangzhou da babbar hanyar kasa ta 107 na nufin za su iya samar da wadannan kayayyaki yadda ya kamata tare da rarraba kayan da aka gama, da yuwuwar rage sawun carbon na sarkar samar da kanta. Kuna iya samun tsarinsu na haɗaɗɗen masana'antu a https://www.zitaifaseners.com.

Wata hanyar ƙarshen rayuwa ita ce ƙetare hawan keke. Na ga tsofaffin hatimin tanki na EPDM, da zarar an tsaftace su, a yanke su kuma a yi amfani da su azaman faifai, tabarmar hana girgiza, ko ma a saman filin wasa. Ba sake yin amfani da ƙima ba ne, amma juriya ne daga shara. Makasudin ya kamata a sanya tazara mai sauyawa har zuwa ƙarshen rayuwa ta zama matsala mai nisa.

Halin da ake ciki: Maganin Ruwa vs. Sinadaran Ƙarfafawa

Ruwa da masana'antar sarrafa ruwan sha ƙasa ce mai ban sha'awa. Anan, dorewa yana nufin hana gurɓatawa da tabbatar da ingantaccen sabis na shekaru da yawa. EPDM tauraro ne don tuntuɓar ruwan sha (ganawa NSF/ANSI 61) da kuma sarrafa nau'ikan sinadarai masu tsarke acid, alkalis, da sinadarai na polar da aka samu a cikin hanyoyin jiyya. A cikin sake fasalin tanki mai fayyace na biyu, mun yi amfani da gaskat EPDM mai ƙarfi, mai warkewar peroxide don babban ƙulle mai tsayi. Yanayin ya kasance danshi akai-akai, ci gaban algal na lokaci-lokaci, da kuma bayyanar sinadarai mai sauƙi daga tsarin jiyya.

Madadin da aka yi la'akari da shi shine gasket na tushen PTFE. Duk da yake mafi ƙarancin sinadarai, abu ne mai ƙarfi mai ƙarfi don samarwa kuma yana da sauƙi ga kwararar sanyi (creep) ƙarƙashin nauyin kulle, yana buƙatar sake jujjuyawa akai-akai. Zaɓin EPDM ya ba da hatimi mai dogara tare da kyawawan kaddarorin dawowa, shigar sau ɗaya kuma an manta. Shekaru biyar baya, babu yoyo, babu kulawa. Ƙididdigar ɗorewa a nan ya haifar da ƙauracewa haɗarin zubewar muhalli, da kuzarin da ke cikin PTFE, da aiki don kulawa. The Gaske Gasket ya kasance mafi ɗorewa cikakke zaɓi, har ma kusa da kayan ƙima kamar PTFE.

Yanayin kasawa don lura: a cikin jiyya na farko ko sarrafa sludge tare da babban mai da abun ciki na hydrocarbon, EPDM zai zama mummunan zaɓi. A nan ne takamaiman sarki. Dorewa ba alama ce ta abu ɗaya-daidai-duk ba.

Ƙididdiga don Dorewa: Iblis a cikin cikakkun bayanai

Don haka, ta yaya kuke yin zaɓi mai dorewa? Yana farawa da takardar ƙayyadaddun bayanai. Kada ku rubuta gaket ɗin EPDM kawai. Wannan malalaci ne. Ƙayyade fili: nemi tsari mai ƙarancin matsawa (ASTM D395), maganin peroxide don mafi kyawun juriya na zafi na dogon lokaci, da ƙayyadaddun nauyi idan kuna buƙatar hatimi mai ƙarfi, mai jurewa extrusion. Nemi game da abin da aka sake yin fa'ida. Wannan matakin daki-daki yana sigina ga masana'antun cewa aiki da zagayen rayuwa suna da mahimmanci.

Na koyi wannan ta hanyar ƙaramar gazawa. Mun ba da umarnin daidaitaccen EPDM don layin ruwan zafi mai ƙarancin matsa lamba. Yayi kyau ga zafin jiki, amma fili yayi laushi sosai. Fiye da shekaru biyu, ya sami gagarumin extrusion akan flanges marasa daidaituwa, wanda ke haifar da raguwar jinkirin. Samfurin mai dorewa na tsawon rai ya gaza saboda ba mu ƙididdige matsalolin injina ba. Mun maye gurbinsa da EPDM mai ƙarfi, 80-durometer, masana'anta mai ƙarfi. Ya kasance a wurin tun. Darasi: Dorewa yana buƙatar ingantaccen aikin injiniya. Ba fasalin talla ba ne; sakamako ne na ingantaccen ilimin kimiyya da ƙira.

A ƙarshe, haɗa kai da masu ƙirƙira waɗanda suka fahimci wannan. Kamfanin da aka saka a cikin tushen samarwa kamar gundumar Yongnian, kamar Handan Zitai Fastener, sau da yawa yana da ƙwarewar aiki na abin da ke aiki a fagen. Suna ganin gazawar da ke dawowa kuma suna iya ba da shawara kan zaɓin fili. Kwarewarsu a cikin tsarin maɗaukaki kuma yana nufin sun fahimci mahimmancin hulɗar tsakanin gasket, saman flange, da tsarin bolting-duk suna da mahimmanci don cimma rayuwar sabis ɗin da aka alkawarta.

Ƙarshe Tunani: Hukunce- Hukunce

Shin EPDM gasket abu ne mai dorewa na masana'antu? Amsar ita ce eh. Dorewarta ba ta asali ba ce amma mai yiwuwa ne. Ana samun ta ta hanyar ƙara ƙarfin ƙarfin sa na almara don wuce sauran zaɓuɓɓuka, ta yadda za a rage sharar gida da tasirin tasirin makamashi akan lokaci. Yana haɓaka ta hanyar rawar da yake takawa wajen inganta ingantaccen makamashi a cikin tsarin thermal. An inganta bayanin martabarta ta hanyar haɗa abun ciki da aka sake yin fa'ida da ingantattun dabaru daga masu samarwa a cikin yankunan masana'anta da aka haɗa.

Babban barazana ga dorewar sahihancin sa shine rashin amfani da aiki. An yi amfani da shi daidai, a cikin madaidaicin sinadari da yanayin zafi, hatimin EPDM ɗaya ne daga cikin mafi aminci da zaɓuɓɓuka masu dorewa. Wannan tsayin daka shine ginshiƙin hujjar muhallinsa. Ba zai warware wuyar warwarewar sake amfani da thermoset ba, amma ta hanyar dawwama shekaru da yawa, yana tura wannan matsalar zuwa gaba yayin isar da ingantaccen aiki a yau. A ƙarshe, gasket mafi ɗorewa shine wanda ba dole ba ne ka maye gurbinsa.