He mea koʻikoʻi ka mea hoʻopaʻa paʻa i ka valve sealing. He aha nā mea e hoʻopaʻa ai i ka valve? Ua ʻike mākou ua hoʻokaʻawale ʻia nā mea apo sealing valve i ʻelua mau ʻāpana: metala a me non-metal. ʻO kēia ka hoʻolauna pōkole i nā kūlana hoʻohana o nā mea hoʻopaʻa like ʻole, a me nā ʻano valve maʻamau.
1. ʻO ka lāʻau synthetic
ʻOi aku ka maikaʻi o nā waiwai piha o ka lāʻau synthetic e like me ke kūpaʻa ʻaila, ka pale wela a me ka pale ʻana i ka corrosion ma mua o ka ʻōpala maoli. ʻO ka mea maʻamau, ʻo ka mahana hoʻohana o ka lāʻau synthetic he t≤150 ℃, a ʻo ka mahana o ka lāʻau kūlohelohe he t≤60 ℃.kiwi puka puka noho pulupulu, nā kīwī diaphragm,ruber seated butterfly valve, ruber seated swing check valve (nā pahu hopu), nā kiwi pinch a me nā kiwi ʻē aʻe me ke kaomi inoa PN≤1MPa.
2. Nailona
Loaʻa i ka Nylon nā hiʻohiʻona o ka liʻiliʻi friction coefficient a me ka pale corrosion maikaʻi. Hoʻohana nui ʻia ʻo Nylon no nā kiwi pōpō a me nā kiwi honua me ka mahana t≤90 ℃ a me ke kaomi nominal PN≤32MPa.
3. PTFE
Hoʻohana nui ʻia ka PTFE no nā kīwaha honua,kiwi puka, kiwi poepoe, a pela aku me ka wela t≤232 ℃ a me ke kaomi inoa PN≤6.4MPa.
4. Ka hao hao
Hoʻohana ʻia ka hao hao nokiwi puka, puni honua, pahu pahu, a me nā mea'ē aʻe no ka mahana t≤100 ℃, kaomi nominal PN≤1.6MPa, kinoea a me ka aila.
5. ʻO ka huila Babbitt
Hoʻohana ʻia ʻo Babbitt alloy no ka pahu ammonia honua me ka mahana t-70 ~ 150 ℃ a me ke kaomi nominal PN≤2.5MPa.
6. Aleki keleawe
ʻO nā mea maʻamau no nā hui keleawe he 6-6-3 tin keleawe a me 58-2-2 keleawe manganese. He maikaʻi ke komo ʻana o ke keleawe keleawe a kūpono i ka wai a me ka mahu me ka mahana t≤200 ℃ a me ke kaomi nominal PN≤1.6MPa. Hoʻohana pinepine ʻia i lokokiwi puka, kiwi honua,nā pahu hopu, hoʻopili pahu, etc.
7. Ke kila kila kila
ʻO nā māka maʻamau o ka chromium stainless steel ʻo 2Cr13 a me 3Cr13, i hoʻopiʻi ʻia a hoʻopaʻa ʻia, a loaʻa ke kūpaʻa maikaʻi. Hoʻohana pinepine ʻia i loko o nā valves no ka media e like me ka wai, ka mahu a me ka ʻaila me ka mahana t≤450 ℃ a me ke kaomi nominal PN≤32MPa.
8. Chromium-nickel-titanium kila kila
ʻO ka papa hana maʻamau o ka chromium-nickel-titanium stainless steel ʻo 1Cr18Ni9ti, he maikaʻi ke kūpaʻa corrosion, erosion a me ka wela. He kūpono ia no ka mahu, ka nitric acid a me nā mea hoʻolaha ʻē aʻe me ka mahana t≤600 ℃ a me ke kaomi nominal PN≤6.4MPa, i hoʻohana ʻia no ka valve honua, ball valve, etc.
9. Ke kila Nitrided
ʻO ka mea maʻamau i hoʻohana ʻia o ke kila nitrided ʻo 38CrMoAlA, nona ke kūpaʻa corrosion maikaʻi a me ka pale ʻana ma hope o ka mālama ʻana i ka carburizing. Hoʻohana maʻamau ʻia i loko o ka pahu puka puka mana me ka mahana t≤540 ℃ a me ke kaomi nominal PN≤10MPa.
10. Boronizing
Hoʻoponopono pololei ʻo Boronizing i ka ili hoʻopaʻa ʻana mai ka mea o ke kino valve a i ʻole ke kino disc, a laila lawe i ka mālama ʻana i ka ʻili o ka boronizing, ʻoi aku ka maikaʻi o ka pale ʻana o ka ʻili. Hoʻohana ʻia i ka valve blowdown station.
Ka manawa hoʻouna: Iune-10-2022
