Muri sisitemu yo gutanga amazi, valve nikintu cyingenzi cyo kugenzura, kikaba gifite cyane cyane imirimo yo kugenzura, gutandukana, kurwanya-gusubira inyuma, gukata, no guhagarika. Umuyoboro ukoreshwa cyane mubikorwa byinganda na gisivili. Ubushyuhe bwo hejuru ni ubwoko busanzwe bukoreshwa muri valve. Imiterere yihariye niyi ikurikira: imikorere myiza yo kuzimya, kuzimya byimbitse birashobora gukorwa; gusudira neza; kwinjiza neza ingaruka, biragoye kuyangiza kubera urugomo; Uburakari bukabije bukunda kuba buke nibindi. Hariho ubwoko bwinshi bwubushyuhe bwo hejuru. Ibisanzwe ni ubushyuhe bwo hejuruikinyugunyugu, ubushyuhe bwo hejuru imipira, Ubushyuhe bwo hejuru-muyunguruzi, n'ubushyuhe bwo hejuru amarembo.

Ubushuhe bwo hejuru burimo amarembo yubushyuhe bwo hejuru, ubushyuhe bwo hejuru bwo gufunga, ubushyuhe bwo hejuru bwo kugenzura, imipira yubushyuhe bwo hejuru cyane, ikinyugunyugu cyo mu bushyuhe bwo hejuru, indabyo zo mu bushyuhe bwo hejuru, hamwe n’ubushyuhe bwo hejuru cyane, ubushyuhe bwo hejuru bugabanya indangagaciro. Muri byo, ibisanzwe bikoreshwa ni amarembo, amarembo yisi, kugenzura imipira, imipira yikinyugunyugu.

Ubushyuhe bwo hejuru bukora cyane cyane burimo ubushyuhe bwo hejuru, ubushyuhe bwo hejuru Ⅰ, ubushyuhe bwo hejuru Ⅱ, ubushyuhe bwo hejuru Ⅲ, ubushyuhe bwo hejuru Ⅳ, nubushyuhe bwo hejuru Ⅴ, bizatangizwa bitandukanye hepfo.

1. Ubushyuhe bwo hejuru

Ubushyuhe bwo hejuru busobanura ko ubushyuhe bwakazi bwa valve buri mukarere ka 325 ～425 ℃. Niba imiyoboro ari amazi hamwe na parike, WCB, WCC, A105, WC6 na WC9 bikoreshwa cyane. Niba imiyoboro ari amavuta arimo sulfure, C5, CF8, CF3, CF8M, CF3M, nibindi, birwanya ruswa ya sulfide, bikoreshwa cyane. Bakoreshwa cyane mubikoresho byo mu kirere no kugabanya ingufu hamwe nibikoresho bitinda bya kokiya mu ruganda. Muri iki gihe, indiba zakozwe muri CF8, CF8M, CF3 na CF3M ntabwo zikoreshwa mukurwanya ruswa ya aside irike, ahubwo zikoreshwa mubikomoka kuri peteroli irimo sulfure hamwe na peteroli na gaze. Muri ubu buryo, ubushyuhe ntarengwa bwo gukora bwa CF8, CF8M, CF3 na CF3M ni 450 ° C.

2. Ubushyuhe bwo hejuru Ⅰ

Iyo ubushyuhe bwakazi bwa valve ari 425 ～550 ℃, ni icyiciro cyo hejuru cy'ubushyuhe I (byitwa icyiciro cya PI). Ibikoresho byingenzi bya PI yo mu rwego rwa PI ni "ubushyuhe bwo hejuru Ⅰ urwego ruciriritse rwa karuboni chromium nikel idasanzwe yisi titanium yubushyuhe bwo kurwanya ubushyuhe" hamwe na CF8 nkuburyo bwibanze muburyo bwa ASTMA351. Kuberako urwego rwa PI nizina ryihariye, igitekerezo cyubushyuhe bwo hejuru butagira ibyuma (P) burimo hano. Kubwibyo, niba uburyo bukoreshwa ari amazi cyangwa amavuta, nubwo ibyuma byubushyuhe bwo hejuru WC6 (t≤540 ℃) cyangwa WC9 (t≤570 ℃) nabyo birashobora gukoreshwa, mugihe ibikomoka kuri peteroli birimo sulferi nabyo bishobora gukoreshwa ibyuma byubushyuhe bwo hejuru C5 (ZG1Cr5Mo), ariko Ntibishobora kwitwa PI-class hano.

3. Ubushyuhe bwo hejuru II

Ubushyuhe bwo gukora bwa valve ni 550 ～650 ℃, kandi ishyirwa mubushyuhe bwo hejuru Ⅱ (byitwa P Ⅱ). PⅡ urwego rwohejuru rwubushyuhe rukoreshwa cyane mumavuta aremereye ya catalitike yamashanyarazi. Harimo ubushyuhe bwo hejuru buringaniye kwambara-irinda amarembo akoreshwa muri nozzle eshatu zizunguruka nibindi bice. Ibikoresho byingenzi bya PⅡ urwego ni "ubushyuhe bwo hejuru Ⅱ urwego rwo hagati ya karubone chromium nikel idasanzwe yisi titanium tantalum ishimangira ibyuma birwanya ubushyuhe" hamwe na CF8 nkuburyo bwibanze muburyo bwa ASTMA351.

4. Ubushyuhe bwo hejuru III

Ubushyuhe bwo gukora bwa valve ni 650 ～730 ℃, kandi ishyirwa mubushyuhe bwo hejuru III (byitwa PⅢ). PⅢ urwego rwohejuru rwubushyuhe rukoreshwa cyane mumavuta manini ya catalitiki yameneka mumashanyarazi. Ibikoresho byingenzi bya PⅢ urwego rwubushyuhe bwo hejuru ni CF8M ishingiye kuri ASTMA351.

5.Ubushyuhe bwo hejuru Ⅳ

Ubushyuhe bwo gukora bwa valve ni 730 ～816 and, kandi irapimwe nkubushyuhe bwo hejuru IV (byitwa PIV kubugufi). Umupaka wo hejuru wubushyuhe bwakazi bwa PIV ni 816 ℃, kubera ko ubushyuhe bwo hejuru butangwa na ASMEB16134 isanzwe yubushyuhe-ubushyuhe bwatoranijwe kubishushanyo mbonera ni 816 ℃ (1500υ). Byongeye kandi, nyuma yubushyuhe bwakazi burenze 816 ° C, ibyuma byegereye kwinjira mukarere k'ubushyuhe. Muri iki gihe, icyuma kiri muri zone deformasiyo ya plastike, kandi icyuma gifite plastike nziza, kandi biragoye kwihanganira umuvuduko mwinshi wakazi ningufu zingaruka no kukirinda guhinduka. Ibikoresho nyamukuru bya P Ⅳ valve ni CF8M muburyo bwa ASTMA351 nkuburyo bwibanze "ubushyuhe bwo hejuru Ⅳ hagati ya karubone ya chromium nikel molybdenum idasanzwe isi titanium tantalum ishimangira ibyuma birwanya ubushyuhe". CK-20 na ASTMA182 bisanzwe F310 (harimo C ibirimo ≥01050%) hamwe na F310H ibyuma birinda ubushyuhe ibyuma.

6, ubushyuhe bwo hejuru Ⅴ

Ubushyuhe bwo gukora bwa valve burenze 816 ℃, byitwa PⅤ, PⅤ ubushyuhe bwo hejuru (kubirindiro byafunzwe, ntibigenga ikinyugunyugu) bigomba gukoresha uburyo bwihariye bwo gushushanya, nko gutondekanya umurongo cyangwa amazi cyangwa gaze Cooling ishobora menya imikorere isanzwe ya valve. Kubwibyo, igipimo cyo hejuru cyubushyuhe bwakazi bwa PⅤ icyiciro cy'ubushyuhe bwo hejuru ntigisobanutse neza, kubera ko ubushyuhe bwakazi bwikurikiranabikorwa butagenwa gusa nibikoresho, ahubwo nuburyo bwihariye bwo gushushanya, hamwe nihame shingiro ryuburyo bwo gushushanya ni kimwe. PⅤ urwego rwohejuru rwubushuhe burashobora guhitamo ibikoresho bifatika bishobora guhura na valve ukurikije uburyo bukora hamwe nigitutu cyakazi hamwe nuburyo bwihariye bwo gushushanya. Muri PⅤ urwego rwohejuru rwubushyuhe, mubisanzwe flapper cyangwa ikinyugunyugu cya flave flapper valve cyangwa ikinyugunyugu kinyugunyugu mubisanzwe byatoranijwe kuva HK-30 na HK-40 ubushyuhe bwo hejuru cyane mubipimo bya ASTMA297. Kurwanya ruswa, ariko ntishobora kwihanganira ihungabana n'umuvuduko mwinshi.