Sistimi ea phepelo ea mokelikeli, valve ke karolo ea bohlokoa ea taolo, eo haholo-holo e nang le mesebetsi ea taolo, phallo, anti-backflow, cut-off, le shunt. Valve e sebelisoa haholo libakeng tsa indasteri le tsa lehae. Mocheso o phahameng oa mocheso ke mofuta o atisang ho sebelisoa li-valve. Lintho tsa eona tse khethehileng ke tse latelang: ts'ebetso e ntle ea ho tima, ho tima ho tebileng ho ka etsoa; weldability e ntle; ho monya hantle ha tšusumetso, ho thata ho e senya ka pefo; Bohale ba bohale bo atisa ho fokotseha joalo-joalo. Ho na le mefuta e batlang e le ngata ea li-valve tsa mocheso o phahameng. Tse atileng haholo ke mocheso o phahamengli-valve tsa serurubele, mocheso o phahameng li-valve tsa bolo, lihloela tsa mocheso o phahameng, le mocheso o phahameng li-valve tsa heke.

Li-valve tsa mocheso o phahameng li kenyelletsa li-valve tsa heke tse nang le mocheso o phahameng oa mocheso, li-valve tse koalang mocheso o phahameng, li-valve tsa ho hlahloba mocheso o phahameng, li-valve tsa bolo ea mocheso o phahameng, li-valve tsa serurubele tse nang le mocheso o phahameng oa mocheso, li-valve tsa nale tse nang le mocheso o phahameng, le li-valve tse fokotsang mocheso o phahameng oa mocheso. Har'a tsona, tse sebelisoang haholo ke li-valve tsa heke, li-valve tsa globe, li-check valves, li-valve tsa bolo le li-valve tsa serurubele.

Maemo a ho sebetsa a mocheso o phahameng haholo a kenyelletsa mocheso o tlase, mocheso o phahameng Ⅰ, mocheso o phahameng Ⅱ, mocheso o phahameng Ⅲ, mocheso o phahameng Ⅳ, le mocheso o phahameng Ⅴ, tse tla hlahisoa ka thoko ka tlase.

1. Mocheso o tlase o phahameng

Mocheso o tlase o phahameng o bolela hore mocheso o sebetsang oa valve o sebakeng sa 325 ～425 ℃. Haeba sehare e le metsi le mouoane, hangata ho sebelisoa WCB, WCC, A105, WC6 le WC9. Haeba sehare ke oli e nang le sebabole, C5, CF8, CF3, CF8M, CF3M, joalo-joalo, tse hanyetsanang le sulfide corrosion, li sebelisoa haholo-holo. Li sebelisoa haholo lisebelisoa tsa sepakapaka le tse fokotsang khatello le lisebelisoa tse liehang tsa ho pheha libakeng tsa ho hloekisoa. Ka nako ena, li-valve tse entsoeng ka CF8, CF8M, CF3 le CF3M ha li sebelisoe bakeng sa ho hanyetsa ho bola ha litharollo tsa acid, empa li sebelisetsoa lihlahisoa tsa oli tse nang le sebabole le liphaephe tsa oli le khase. Boemong bona, mocheso o phahameng oa ho sebetsa oa CF8, CF8M, CF3 le CF3M ke 450 ° C.

2. Mocheso o phahameng Ⅰ

Ha mocheso o sebetsang oa valve ke 425 ～550 ℃, ke sehlopha sa maemo a phahameng a mocheso a holimo (seo ho thoeng ke sehlopha sa PI). Thepa e ka sehloohong ea belofo ea PI ke "mocheso o phahameng Ⅰ grade medium carbon chromium nickel rare earth titanium high quality-resistant steel" le CF8 e le sebopeho sa motheo ho ASTMA351 standard. Hobane sehlopha sa PI ke lebitso le khethehileng, khopolo ea tšepe e sa hloekang ea mocheso o phahameng (P) e kenyelelitsoe mona. Ka hona, haeba sebaka sa ho sebetsa e le metsi kapa mouoane, le hoja tšepe e nang le mocheso o phahameng oa WC6 (t≤540 ℃) kapa WC9 (t≤570 ℃) le eona e ka sebelisoa, ha lihlahisoa tsa oli tse nang le sebabole li ka sebelisoa le tšepe ea mocheso o phahameng. C5 (ZG1Cr5Mo), empa Li ke ke tsa bitsoa PI-class mona.

3. Mocheso o phahameng oa II

Mocheso o sebetsang oa valve ke 550 ～650 ℃, 'me e khetholloa e le mocheso o phahameng Ⅱ (o bitsoang P Ⅱ). Valve ea mocheso o phahameng oa PⅡ e sebelisoa haholo sesebelisoa se matla sa ho qhekella sa oli. E na le valafo ea heke e sa keneleng mocheso oa mocheso o phahameng e sebelisoang ka nozzle e potolohang tse tharo le likarolo tse ling. Thepa e ka sehloohong ea valve ea sehlopha sa PⅡ ke "mocheso o phahameng Ⅱ grade medium carbon chromium nickel rare earth titanium tantalum e matlafalitsoeng ke tšepe e sa keneleng mocheso" ka CF8 e le sebopeho sa motheo ho ASTMA351 standard.

4. Mocheso o phahameng oa III

Mocheso o sebetsang oa valve ke 650 ～730 ℃, 'me e khetholloa e le mocheso o phahameng oa III (o bitsoang PⅢ). Li-valve tsa mocheso o phahameng oa sehlopha sa PⅢ li sebelisoa haholo likarolong tse kholo tsa ho phatloha ha oli e boima libakeng tsa ho hloekisa. Lintho tse ka sehloohong tsa valve ea mocheso o phahameng oa sehlopha sa PⅢ ke CF8M e thehiloeng ho ASTMA351.

5.Mocheso o phahameng Ⅳ

Mocheso o sebetsang oa valve ke 730 ～816 ℃, 'me e lekantsoe e le mocheso o phahameng oa IV (o bitsoang PIV ka bokhutšoanyane). Moeli o ka holimo oa mocheso o sebetsang oa valve ea PIV ke 816 ℃, hobane mocheso o phahameng ka ho fetisisa o fanoang ke tekanyo e tloaelehileng ea ASMEB16134 khatello ea mocheso e khethiloeng bakeng sa moralo oa valve ke 816 ℃ (1500υ). Ho phaella moo, ka mor'a hore mocheso oa ho sebetsa o fete 816 ° C, tšepe e haufi le ho kena sebakeng sa mocheso oa forging. Ka nako ena, tšepe e sebakeng sa polasetiki ea deformation, 'me tšepe e na le polasetiki e ntle,' me ho thata ho mamella khatello e phahameng ea ho sebetsa le matla a ts'ebetso le ho e thibela ho senyeha. Thepa e ka sehloohong ea valve ea P Ⅳ ke CF8M ho ASTMA351 e tloaelehileng e le sebopeho sa motheo "mocheso o phahameng Ⅳ medium carbon chromium nickel molybdenum rare earth titanium tantalum e matlafalitsoeng ke tšepe e sa keneleng mocheso". CK-20 le ASTMA182 F310 e tloaelehileng (ho kenyeletsoa le C content ≥01050%) le F310H tšepe e sa hloekeng mocheso.

6, mocheso o phahameng Ⅴ

Mocheso o sebetsang oa valve o phahame ho feta 816 ℃, o bitsoang PⅤ, PⅤ valve e phahameng ea mocheso (bakeng sa li-valve tse koalang, tse sa laoleng li-valve tsa serurubele) li tlameha ho sebelisa mekhoa e khethehileng ea moralo, joalo ka lesela la ho kenya lesela kapa metsi kapa khase. netefatsa ts'ebetso e tloaelehileng ea valve. Ka hona, moeli o ka holimo oa mocheso o sebetsang oa sehlopha sa PⅤ se nang le mocheso o phahameng oa mocheso ha o hlalosoe, hobane mocheso o sebetsang oa valve ea taolo ha o khethoe feela ke thepa, empa ka mekhoa e khethehileng ea moralo, le molao-motheo oa motheo oa mokhoa oa ho qapa. hoa tšoana. PⅤ valve e phahameng ea mocheso e ka khetha lisebelisoa tse utloahalang tse ka kopanang le valve ho ea ka mokhoa oa eona oa ho sebetsa le khatello ea ho sebetsa le mekhoa e khethehileng ea moralo. Sehlopheng sa PⅤ se nang le mocheso o phahameng oa mocheso, hangata sephahla kapa valve ea serurubele sa flue flapper valve kapa valve ea butterfly hangata e khethoa ho tloha ho HK-30 le HK-40 li-alloys tsa mocheso o phahameng oa ASTMA297. Corrosion resistant, empa e sa kgone ho mamella ho tshoha le meroalo ya kgatello e phahameng.