Butterfly bawul wurin zamawani yanki ne mai cirewa a cikin bawul ɗin, babban aikin shine tallafawa farantin bawul ɗin gabaɗaya a buɗe ko rufe gabaɗaya, kuma ya zama mataimakin hatimi.Yawancin lokaci, diamita na wurin zama shine girman ma'aunin valve.Butterfly bawul wurin zama kayan yana da fadi sosai, kayan da aka saba amfani da su sune taushi sealing EPDM, NBR, PTFE, da karfe wuya sealing carbide abu.A gaba za mu gabatar da daya bayan daya.
1.EPDM-Idan aka kwatanta da sauran roba-manufa, EPDM roba yana da babban abũbuwan amfãni, yafi nuna a:
A. Mai tsada sosai, a cikin ayaba da aka saba amfani da shi, EPDM ɗanyen roba hatimin shine mafi sauƙi, zaku iya cika da yawa, rage farashin roba.
B. EPDM kayan tsufa juriya, tsayayya da hasken rana, juriya na zafi, juriya na ruwa, juriya na radiation, dace da raunin acid da kuma alkali kafofin watsa labarai, kyawawan kayan haɓakawa.
C. Yanayin zafin jiki, mafi ƙasƙanci zai iya zama -40 ° C - 60 ° C, zai iya zama yanayin zafin jiki na 130 ° C don amfani na dogon lokaci.
2.NBR-mai jurewa, zafi mai zafi, sawa mai juriya kuma a lokaci guda yana da kyakkyawan juriya na ruwa, rufewar iska da kyawawan abubuwan haɗin gwiwa.Ƙarin aikace-aikace a cikin bututun mai, rashin lahani shi ne cewa ba shi da tsayayya ga ƙananan yanayin zafi, juriya na ozone, ƙananan kayan rufewa, elasticity kuma gabaɗaya.
3. PTFE: wani fluorine filastik, wannan abu yana da karfi juriya ga acid da alkali, Kang daban-daban Organic kaushi yi, yayin da abu ne high zafin jiki juriya, za a iya amfani da ci gaba a 260 ℃, mafi yawan zafin jiki iya isa 290-320 ℃. , PTFE ya bayyana, ya yi nasarar magance masana'antun sinadarai, man fetur, magunguna da sauran masana'antu a fagen matsaloli masu yawa.
4. Metal wuya hatimi (carbide): karfe wuya hatimi bawul wurin zama abu yana da matukar kyau juriya ga high zafin jiki da kuma high matsa lamba, lalata juriya, sa juriya halaye, da kyau sosai don gyara ga lahani na taushi sealing abu ba resistant zuwa. high zafin jiki da kuma high matsa lamba, amma da wuya hatimi abu a kan aiki bukatun na tsari ne sosai high, kawai hasara na karfe wuya hatimi bawul wurin zama sealing yi ne matalauta, zai kasance a cikin dogon lokaci bayan aiki na aikin na yabo.