Laho ʻoihana

Hiki i ka laholio kūlohelohe ke kū i nā mea pāpaho e like me ka wai maʻemaʻe, ka wai paʻakai, ka ea, ke kinoea inert, nā alkalis, a me nā hopena paʻakai; akā naʻe, e hōʻino nā ʻaila mineral a me nā mea hoʻoheheʻe non-polar iā ia. Hana maikaʻi loa ia i nā mahana haʻahaʻa a he mahana hoʻohana lōʻihi ʻaʻole iʻoi aku ma mua o 90°C. Hana ia ma -60°C. E hoʻohana i ka laʻana ma luna.

ʻAe ʻia nā hui petroleum e like me ka ʻaila wahie, ka ʻaila lubricating, a me ka petroleum no ka nitrile rubber. ʻO ka pae mahana no ka hoʻohana lōʻihi he 120°C, 150°C i ka ʻaila wela, a me -10°C a i -20°C i nā mahana haʻahaʻa.

ʻO ke kai, nā waikawa nāwaliwali, nā alkalis nāwaliwali, nā hopena paʻakai, ke kūpaʻa maikaʻi loa i ka oxygen a me ka ozone, ke kūpaʻa ʻaila i emi iho ma mua o ka nitrile rubber akā ʻoi aku ka maikaʻi ma mua o nā rubber maʻamau ʻē aʻe, nā mahana hoʻohana lōʻihi ma lalo o 90 °C, nā mahana hoʻohana kiʻekiʻe loa ʻaʻole i ʻoi aku ma mua o 130 °C, a me nā mahana haʻahaʻa ma waena o -30 a me 50 °C he kūpono ia no ka rubber chloroprene.

Hiki mai ka laholio fluorinema nā ʻano like ʻole, aia nā mea āpau i ka waikawa maikaʻi, ka oxidation, ka ʻaila, a me ke kūpaʻa solvent. ʻOi aku ka haʻahaʻa o ka mahana hoʻohana lōʻihi ma mua o 200°C, a hiki ke hoʻohana ʻia me nā mea waikawa āpau a me kekahi mau ʻaila a me nā mea hoʻoheheʻe.

Hoʻohana nui ʻia ka pepa laholio ma ke ʻano he gasket flange no nā pipelines a i ʻole nā ​​​​lua manhole i wāwahi pinepine ʻia a me nā lua lima, a ʻaʻole ʻoi aku ke kaomi ma mua o 1.568MPa. ʻO nā gasket laholio ka palupalu loa a ʻoi aku ka maikaʻi i ka hoʻopili ʻana ma waena o nā ʻano gaskets āpau, a hiki iā lākou ke hana i kahi hopena sila me kahi ikaika pre-tighting liʻiliʻi. Ma muli o kona mānoanoa a i ʻole ka paʻakikī haʻahaʻa, no laila e maʻalahi ka ʻomi ʻana i ka gasket i waho ke kaomi ʻia i loko.

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

ʻOi aku ka maikaʻi o nā pads rabbo i nā kūlana vacuum a me ke kaomi haʻahaʻa (ʻoi aku hoʻi ma lalo o 0.6MPa). He mānoanoa ka mea rabbo a hiki ke komo i ka ea i kahi liʻiliʻi. No nā pahu vacuum, no ka laʻana, hana maikaʻi loa ka rabbo fluorine ma ke ʻano he gasket sila ʻoiai hiki i ka pae vacuum ke piʻi a hiki i ka 1.310-7Pa. Pono e hoʻomoʻa ʻia a hoʻomoʻa ʻia ka pads rabbo ma mua o ka hoʻohana ʻana i ka pae vacuum o 10-1 a i 10-7Pa.

Pepa Laho Asbestos

ʻOiai ua hoʻohui ʻia ka laholio 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 ʻoiai ke emi ke kumukūʻai ma mua o nā gaskets ʻē aʻe a he maʻalahi hoʻi e hoʻohana. No laila, ʻoiai inā ʻaʻole nui loa ke kaomi a me ka mahana, ʻaʻole hiki ke hoʻohana ʻia i nā mea haumia nui. Ma muli o ke kalapona o ka laholio a me nā mea hoʻopihapiha i ka wā e hoʻohana ʻia ai i kekahi ʻano aila wela kiʻekiʻe, ma kahi kokoke i ka hopena o ka hoʻohana ʻana, ua emi ka ikaika, ua palupalu ka mea, a komo ka komo ʻana ma ka interface a i loko o ka gasket, e alakaʻi ana i ka coking a me ka uahi. Eia kekahi, i nā mahana kiʻekiʻe, pili koke ka pepa laholio asbestos i ka ʻili sila flange, kahi e hoʻopilikia ai i ke kaʻina hana o ka hoʻololi ʻana i ka gasket.

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

Hoʻopilikia nui ʻia ka ikaika o ka pepa laholio asbestos e ka medium. No ka laʻana, ʻokoʻa ka ikaika tensile transverse o ka pepa laholio asbestos No. 400 i ka ʻaila ma waena o ka ʻaila lubricating mokulele a me ka wahie mokulele ma 80%, ʻo ia hoʻi no ka mea ʻoi aku ka nui o ka pehu ʻana o ka laholio i loko o ka pepa e ka gasoline mokulele ma mua o ka ʻaila lubricating mokulele. I ka mālamalama o nā noʻonoʻo i ʻōlelo ʻia ma luna, ʻo ka mahana hana palekana a me nā pae kaomi no ka pepa laholio asbestos home XB450 he 250 °C a i 300 °C a me 3 3.5 MPa; ʻo ka mahana kiʻekiʻe loa no ka pepa laholio asbestos No. 400 i ka ʻaila he 350 °C.

Aia nā ʻiona chloride a me sulfur i loko o ka pepa laholio asbestos. Hiki i nā flanges metala ke kūkulu koke i kahi pākaukau pala ma hope o ka omo ʻana i ka wai. ʻOi aku ka nui o ka sulfur i loko o ka pepa laholio asbestos kūpaʻa i ka ʻaila ma mua o ka pepa laholio asbestos maʻamau, e kūpono ʻole ai no ka hoʻohana ʻana i nā mea ʻaila ʻole. I loko o nā mea ʻaila a me nā mea hoʻoheheʻe, e pehu ka gasket, akā a hiki i kahi manawa, ʻaʻohe ona hopena i ka hiki ke sila. No ka laʻana, hana ʻia kahi hoʻāʻo hoʻoluʻu 24-hola i loko o ka wahie mokulele ma ka mahana o ka lumi ma ka pepa laholio asbestos kūpaʻa i ka ʻaila No. 400, a ua kauoha ʻia ʻaʻole e ʻoi aku ka nui o ke kaumaha i hoʻokumu ʻia e ka omo ʻana o ka ʻaila ma mua o 15%.