Hoʻokaʻawale ʻia nā valve e ka nui nominal/pressure/temperatura/material/connection/handling

Hoʻokaʻawale ʻia nā ʻūlū e ka nui o ka inoa / kaomi / wela / mea / pili / lawelawe ʻia ʻO ka ʻino kemika o ka metala e pili ana i ka mahana, ka ukana mechanical o nā ʻāpana friction, ka paʻa o nā sulfides i loko o nā mea lubricating a me ko lākou kūpaʻa waikawa, ka lōʻihi o ka pilina me ka waena a me ka hopena catalytic o ka metala ma ke kaʻina hana nitriding, ka hoʻololi ʻana o nā molekala o nā mea corroding i nā metala, a me nā mea ʻē aʻe. Ma muli o ka hiki ʻana mai o ka corrosion i ka launa pū ʻana ma waena o nā metala a me ke kaiapuni a puni, pehea ka hoʻokaʻawale ʻana i nā metala mai ke kaiapuni a i ʻole ka hoʻohana ʻana i nā mea synthetic non-metallic i lilo i mea hopohopo maʻamau. 2. Ua ʻike maopopo ʻia he hopena nui ka pōʻino metala i ke ola, ka hilinaʻi a me ke ola lawelawe o nā kiwi. ʻO ka hana a nā mea hana mechanical a corrosive ma luna o ka metala e hoʻonui nui i ka nui o ka lole ma ka ʻili pili. Valve i ka wā hana, friction o ka ili o ka huina nui o ka lole. I ka wā o ka hana ʻana o ka valve, hoʻopau ʻia nā wahi friction a pōʻino ma muli o ka hana mechanical like a me nā pilina kemika a electrochemical ma waena o ka metala a me ke kaiapuni. No ka valve, paʻakikī nā kūlana ea hana pipeline; ʻO ka loaʻa ʻana o ka hydrogen sulfide, carbon dioxide a me kekahi mau ʻakika organik i loko o ka aila, ke kinoea maoli a me ka wai waihona e hoʻonui ai i ka mana luku o ka ʻili metala, no laila e nalowale koke i kona hiki ke hana. 3, ma muli o ka corrosion kemika o ka metala e pili ana i ka mahana, ka ukana mechanical o nā ʻāpana friction, nā mea lubricating i loaʻa i ka sulfide a me kona kūpaʻa kūpaʻa a me ka lōʻihi o ka launa pū ʻana a me ka metala ma ke kaʻina hana nitriding o ka hana catalytic, corrosion o nā molekala o ka mea. ma ka wikiwiki hoʻololi metala a pēlā aku. No laila, ua lilo ke ʻano anticorrosion o ka valve metala (a i ʻole ke ana) a me ka hoʻohana ʻana i ka valve material synthetic i kekahi o nā kumuhana o ka noiʻi ʻoihana valve. 4, metala valve anticorrosion, hiki ke hoʻomaopopo ʻia e like me ka pahu metala i uhi ʻia e pale i ke ʻano o ka papa pale mai ka corrosion (e like me ka pena, pena, nā mea lubricating, etc.), i hiki ai i ka valve inā i ka hana ʻana, mālama, lawe. a i ʻole ma ke kaʻina holoʻokoʻa o kāna hoʻohana ʻana ʻaʻole i ʻino. 5, metala valve anticorrosion ala pili i ka mea e pono ai ka pale manawa, ka halihali a me ka mālama 'ana i nā kūlana, valve kūkulu 'ano a me nā mea waiwai, 'oiaʻiʻo, e noonoo i ka hoʻokele waiwai o ka wehe 'ana i ka anticorrosion. Ka hoʻokaʻawale ʻana o nā kiwi e like me ke anawaena inoa / puʻe / wela / mea / ʻano pili / ʻano hana Ka hoʻokaʻawale ʻana o nā kiwi e like me ke anawaena nominal 1, "pull diameter liʻiliʻi" anawaena nominal DN≤40mm 2, "valve waena waena" anawaena nominal DN50-300mm 3, "nui anawaena kiwi puuwai" Nominal anawaena DN350-1200mm kiwi 4, "nui anawaena kiwikā" nominal anawaena DN≥1400mm kiwiwi kiwi ua helu 'ia e like me ka nominal nui kiwikā 1, "li'ili'i li'ili'i pahu hopu" nominal anawaena DN≤40mm valve 2, "medium kawiwi kaila" anawaena nominal DN50-300mm kiwi 3, "nui kiwi puuwai" nominal anawaena DN350-1200mm kiwi 4, "nui anawaena kiwi" nominal anawaena DN≥1400mm kiwi Ka helu ana o na kiwi pumehana nominal 1, "vacuum valve" e emi ana ke kaomi hana. ma mua o ka maʻamau o ka lewa puʻu 2, "haʻahaʻa puʻupuʻu puʻupaʻa" nominal kaomi PN≤ 1.6mpa kiwi 3, "medium pressure valve" nominal pressure PN2.5-6.4mpa valve 4, "kiʻekiʻe kiʻekiʻe kiʻekiʻe" kaomi nominal PN10.0-80.0mpa valve 5, "super high pressure valve" nominal pressure PN≥100MPA valve E like me ka ho'onohonoho 'ana o ka wela wela wela 1, "ki'eki'e wela kiwi" T > 450℃ kiwi 2, "medium wela valve" 120℃≤ T ≤450℃ valve 3, "pahu wela maʻamau" -40 ℃ ≤ T ≤120 ℃ kiwi 4, "pahu wela haʻahaʻa" -100 ℃≤ T ≤-40 ℃ kiwi 5, "** kiwi wela" T