Lapa ʻoihana

Hiki i ka ʻōpala maoli ke kū i ka media e like me ka wai maʻemaʻe, ka wai paʻakai, ka ea, ke kinoea inert, ka alkali, a me nā mea paʻakai; akā naʻe, e hōʻino ʻia ka aila mineral a me nā mea hoʻoheheʻe non-polar. Hana maikaʻi loa ia ma nā wela haʻahaʻa a loaʻa ka mahana hoʻohana lōʻihi ʻaʻole i oi aku ma mua o 90°C. Hiki ke hana ma -60 °C. E hoʻohana i ka laʻana ma luna.

Hiki ke ʻae ʻia nā pūhui ʻaila me ka ʻaila hinu, ka aila lubricating, a me ka ʻaila no ka nitrile rubber. ʻO ka pae wela no ka hoʻohana lōʻihi he 120 ° C, 150 ° C i ka ʻaila wela, a me -10 ° C i -20 ° C ma nā haʻahaʻa haʻahaʻa.

ʻO ka wai kai, nā ʻakika nāwaliwali, nā alkalina nāwaliwali, nā wai paʻakai, ka oxygen maikaʻi loa a me ka pale ʻana i ka wā kahiko o ka ozone, ka pale ʻana i ka aila i haʻahaʻa i ka nitrile rubber akā ʻoi aku ka maikaʻi ma mua o nā ʻōpala maʻamau, nā mahana hoʻohana lōʻihi ma lalo o 90 °C, nā mahana hoʻohana kiʻekiʻe loa. ʻAʻole ʻoi aku ka kiʻekiʻe ma mua o 130 °C, a ʻo nā haʻahaʻa haʻahaʻa ma waena o -30 a me 50 °C ua kūpono ia no ka chloroprene rubber.

Hele mai ka lāʻau fluorinei nā ʻano ʻano like ʻole, loaʻa nā mea a pau i ka waikawa maikaʻi, oxidation, ʻaila, a me ka pale pale. ʻOi aku ka haʻahaʻa o ka mahana hoʻohana lōʻihi ma mua o 200 ° C, a hiki ke hoʻohana ʻia me ka pāpaʻi ʻakika āpau a me kekahi mau aila a me nā mea hoʻoheheʻe.

Hoʻohana nui ʻia ka ʻōpala e like me ka flange gasket no nā pipelines a i ʻole nā ​​​​manholes i wāwahi pinepine ʻia a me nā lua lima, ʻaʻole ʻoi aku ka nui o ke kaomi ma mua o 1.568MPa. ʻO nā ʻeke Rubber ka mea palupalu a maikaʻi loa i ka hoʻopaʻa ʻana i waena o nā ʻano gasket a pau, a hiki iā lākou ke hana i kahi hopena sila me ka ikaika liʻiliʻi ma mua. Ma muli o kona mānoanoa a i ʻole ka paʻakikī paʻakikī, ua maʻalahi ke kaomi ʻana i ka gasket ma lalo o ke kaomi kūloko.

Hoʻohana ʻia nā pepa Rubber i loko o nā mea hoʻoheheʻe kūlohelohe e like me benzene, ketone, ether, a me nā mea ʻē aʻe i hiki ke hoʻopau i ka sila ma muli o ka pehu ʻana, ka ulu ʻana o ke kaumaha, ka palupalu, a me ka paʻa. Ma keʻano laulā, ʻaʻole hiki ke hoʻohana inā ʻoi aku ka nui o ka pehu ma mua o 30%.

ʻOi aku ka maikaʻi o nā pads Rubber i nā kūlana haʻahaʻa a me ke kaomi haʻahaʻa (ma lalo o 0.6MPa). ʻOi aku ka ʻeleʻele a paʻa iki ka ea. No nā ipu ʻūhā, no ka laʻana, ʻoi aku ka maikaʻi o ka hana ʻana o ka lāʻau fluorine ma ke ʻano he mea hoʻopaʻa hoʻopaʻa ʻana no ka mea hiki ke kiʻekiʻe ke kiʻekiʻe e like me 1.310-7Pa. Pono e hoʻomoʻa ʻia ka pā paʻipaʻi ma mua o ka hoʻohana ʻana i loko o ka laulā o 10-1 a 10-7Pa.

Pepa Rubber Asbestos

ʻOiai ua hoʻohui ʻia ka ʻōpala a me nā mea hoʻopihapiha like ʻole i ka mea gasket, ʻo ka pilikia nui ʻaʻole hiki iā ia ke hoʻopaʻa piha i nā pores liʻiliʻi ma laila, a he wahi liʻiliʻi o ke komo ʻana inā ʻoi aku ke kumukūʻai ma mua o nā gaskets ʻē aʻe. maʻalahi e hoʻohana. No laila, ʻoiai inā ʻaʻole i ʻoi aku ke kiʻekiʻe o ke kaomi a me ka mahana, ʻaʻole hiki ke hoʻohana ʻia i nā media hoʻohaumia loa. Ma muli o ka carbonization o ka lāʻau a me nā mea hoʻopiha i ka wā i hoʻohana ʻia i loko o kekahi ʻano aila wela kiʻekiʻe, ma kahi kokoke i ka hopena o ka hoʻohana ʻana, hoʻemi ʻia ka ikaika, lilo ka waiwai, a komo ke komo ʻana ma ka interface a i loko o ka gasket, e alakaʻi ana i ka coking a smoke.Additionally, i ke kiʻekiʻe wela, ka asbestos rubber sheet maʻalahi pili i ka flange sealing ili, e complicates ke kaʻina hana o ka hoʻololi i ka gasket.

ʻO ka paʻa ikaika o ka mea gasket e hoʻoholo i ke kaomi o ka gasket ma nā ʻano media like ʻole i kahi kūlana wela. Loaʻa nā mea i loaʻa nā fiber asbestos i ka wai crystallization a me ka wai adsorption. Ma luna o 500 ° C, hoʻomaka ka wai o ka crystallization e kahe, a emi ka ikaika. Ma 110 ° C, ua hoʻoheheʻe ʻia ʻelua hapakolu o ka wai i hoʻopili ʻia ma waena o nā fibers, a ua emi ka ikaika tensile o ka fiber ma kahi o 10%. Ma 368 ° C, ua hoʻoheheʻe ʻia nā wai i hoʻopili ʻia a pau, a ua emi ka ikaika tensile o ka fiber ma kahi o 20%.

Hoʻopili nui ʻia ka ikaika o ka ʻōpala asbestos e ka waena. No ka laʻana, ʻokoʻa ka ikaika tensile transverse o No. 400 oil-resistant asbestos rubber sheet ma waena o ka ʻaila lubricating a me ka wahie mokulele e 80%, ʻo ia hoʻi no ka mea ʻoi aku ka paʻakikī o ka pehu ʻana o ka pahu i loko o ka pepa e ka aviation gasoline ma mua o ka mokulele. aila lubrication. Ma ka malamalama o na noonoo ana i olelo mua ia, ka palekana hana ana wela a me ka puʻe pae no ka home asbestos rubber sheet XB450 he 250 °C i 300°C a me 3 3.5 MPa; ʻO ka wela kiʻekiʻe no ka helu 400 ʻaila-kūpaʻa asbestos pāpaʻi he 350 °C.

Loaʻa nā ions chloride a me ka sulfur i loko o ka pepa ʻōpala asbestos. Hiki i nā flanges metala ke kūkulu koke i ka pilahi ʻino ma hope o ka hoʻomoʻa ʻana i ka wai. ʻO ka ʻoi aku, ʻoi aku ka nui o ke kiʻekiʻe o ka ʻaila asbestos rubber sheet ma mua o ka pepa asbestos maʻamau, no laila ʻaʻole kūpono ia no ka hoʻohana ʻana i nā pāpaʻi ʻaila ʻole. I ka aila a me ka mea hoʻoheheʻe media, e pehu ka gasket, akā a hiki i kahi manawa, ʻaʻohe hopena i ka hiki ke hoʻopaʻa. No ka laʻana, hana ʻia ka hoʻāʻo ʻana i ka hoʻāʻo ʻana he 24-hola i ka wahie lele ma ka lumi wela ma luna o ka Helu 400 oil-resistant asbestos rubber sheet, a ua kauoha ʻia ʻo ka piʻi ʻana o ke kaumaha ma muli o ka lawe ʻana i ka aila ʻaʻole pono e ʻoi aku ma mua o 15%.