Hydraulic Qis Khoom Khoom Txheem Lus Valve Lub Cev

Tam sim no, feem ntau ntawm cov hydraulic valve ntau yam yog cov luam yeeb hlau ua lub ntsiab valve cev khoom.

Cov khoom ntawm lub plhaub ntawm lub cev ntawm lub hydraulic valve yuav tsum tau ua ntej coj mus rau hauv tus account lub cev nqaij daim tawv (kub, siab) thiab cov khoom siv tshuaj (corrosivity) ntawm lub chaw ua haujlwm.

Nyob rau tib lub sij hawm, peb yuav tsum tau tseem to taub qhov kev huv ntawm qhov nruab nrab (tsis muaj ib qho khoom ua tau zoo). Ntxiv rau, siv rau cov kev cai thiab cov cai hauv lub Xeev thiab kev siv sector.

Hydraulic valve lub cev khoom, ntau yam, muaj feem xyuam rau ntau hom kev ua hauj lwm txawv. Cov khoom siv khom nquag siv, cov ntaub ntawv nyob sab hauv thiab sealing cov ntaub ntawv hauv qab yog piav qhia hauv qab no.

Hydraulic valve lub cev feem ntau siv cov khoom

1. Hlau

Grey hlau valve yog siv rau ntau yam kev lag luam ntawm kev lag luam rau nws cov nqi qis thiab cov ntaub ntawv thoob plaws. Lawv feem ntau siv rau hauv cov dej, qhov cub, roj thiab roj, thiab tau siv ntau yam tshuaj lom neeg, luam tawm thiab roj, roj, textile thiab ntau lwm yam khoom uas muaj tsawg los tsis cuam tshuam cov pa phem.

Haum rau kev ua haujlwm kub nruab nrab ntawm -15 ~ 200 ℃, nominal siab pn≤1.6MPa qis siab hydraulic valve lub cev.

2. Dub-hearted malleable cam khwb cia hlau

Haum rau kev ua haujlwm kub nruab nrab ntawm -15 ~ 300 ℃, nominal siab pn≤2.5MPa nruab nrab thiab qis siab hydraulic valve lub cev. Cov chaw nruab ntug siv tau rau dej, se dej, roj, ammonia thiab lwm yam.

3. Hlau

Cov luam yeeb hlau yog ib hom kev cam khwb cia hlau, qhov cam khwb cia hlau, pellet lossis spherical graphite hloov cov nplaim hluav taws xob hauv cov nplaum hlau. Qhov kev hloov ntawm tus qauv hauv cov hlau ua rau nws cov khoom siv zoo tshaj qhov uas zoo tib yam nplaum txhuam hlau thiab tsis ua rau lwm cov khoom. Vim li no, lub hydraulic valve lub cev ua ntawm cov hlau luam yog ntau dua li ntawm cov hydraulic valve lub cev tau ntawm grey hlau. Haum rau kev ua haujlwm kub nruab nrab ntawm -30 ~ 350 ℃, nominal siab pn≤4.0MPa nruab nrab thiab qis siab hydraulic valve lub cev.

Chaw tsim nyog rau nruab nrab dej, dej hiav txwv, ua pa, cua, roj, roj thiab lwm yam.

4. Cov pa roj carbon

(WCA, WCB, WCC) thaum xub thawj txoj kev txhim kho steel hlau yog kom haum rau cov neeg tshaj li ntawm cov kav dej nrum thiab cov nplhaib qhov siv tau ntau lawm. Txawm li cas los xij, vim tias qhov kev ua tau zoo ntawm cov hlau tsis muaj zog, thiab lub zog tsis zoo ntawm kev ntxhov siab vim los ntawm kev thermal expansion, kev cuam tshuam thiab kev sib deev deformation, kev siv ntau yam loj dua, uas feem ntau muaj xws li kev ua haujlwm ntawm cov cam khwb cia hlau valve thiab lub bronze hydraulic valve lub cev.

Haum rau kev ua haujlwm kub hauv nruab nrab thiab kev kub siab hydraulic valve lub cev ntawm -29 ~ 425 ℃. Ntawm lawv 16Mn, 30 Mn kub yog -40 ~ 400 ℃, feem ntau siv los hloov ASTM A105. Qhov nruab nrab yog muaj qhov cub xyaw thiab kub hnyiab. Kub thiab kub tsis muaj roj, roj gas, cua tshuab, dej, roj thiab lwm yam.

5. Qis Kub Kub Hlau

(LCB) Tsawg-kub kub carbon thiab tsis tshua muaj nickel hlau hlau yuav siv tau rau hauv qab hauv zero, tiam sis tsis txuas rau tob chaw txias. Lub hydraulic valve lub cev ua ntawm cov ntaub ntawv no yog tsim rau cov xov xwm nram qab no, xws li dej hiav txwv, carbon dioxide, acetylene, propylene thiab ethylene.

Haum rau kev khiav hauj lwm kub hauv -46 ~ 345 ℃ ntawm qhov kub thiab txias hydraulic valve lub cev.

6. Hlau

Cov Khoom Uas Muaj Cov Khoom Uas Muaj Cov Khoom Uas Muaj Cov Khoom Uas Muaj Cov Khoom Uas Muaj Cov Khoom Uas Muaj Cov Khoom Uas Muaj Cov Khoom Uas Muaj Cov Khoom Uas Muaj Cov Khoom Uas Muaj Cov Khoom Uas Muaj Cov Kws Ua Hauj Lwm. Carbon steel valve kev kub hauj lwm yuav siv tau rau 500 ℃, tsis tshua muaj hlau phom li qub rau 600 ℃ los yog ntau dua. Thaum nce kub, cov khoom sib txuas ntawm cov hlau qes hlau-tsawg hlau muaj siab tshaj cov pa roj carbon.

High-pressure high-pressure hydraulic valve lub cev uas haum rau kev ua haujlwm kub nruab nrab ntawm -29 ~ 595 ℃ thiab cov khoom tsis muaj zog; C5, C12 yog haum rau kev kub high-pressure hydraulic valve lub cev ntawm corrosive nruab nrab ntawm -29 ~ 650 ℃ thiab kev khiav hauj lwm kub.

7. Austenitic stainless hlau

Austenitic stainless hlau muaj li 18% chromium thiab 8% npib tsib xees. 18-8 austenitic stainless hlau feem ntau siv los ua ib qho hydraulic valve lub cev thiab cov khoom siv lub cav ntim khoom nruab nrab hauv siab thiab tsawg thiab muaj zog corrosion. Ntxiv molybdenum rau 18-8 stainless hlau matrix thiab me ntsis nce cov ntsiab lus ntawm xee caj pas tuaj yeem ua rau nws qhov kev xeb hluav taws xob tuaj. Hydraulic valve lub cev ua ntawm no hom ntawm hlau yuav siv tau ntau hauv kev lag luam chemical, xws li thauj acetic acid, nitric acid, alkali, tshuaj dawb, kua txiv, carbonic acid, tanning kua thiab ntau lwm cov khoom tshuaj.

Thiaj li yuav siv cov kev kub siab, ntxiv cov ntaub ntawv muaj pes tsawg tus, ntxiv rau hauv cov hlau no ntxiv cov niobium, hu ua 18-10-NB, qhov ntsuas kub yuav raug siv rau 800 ℃.

Austenitic stainless steels feem ntau yog siv tsawg heev thiab tsis ua txhav, yog li cov hydraulic valve lub cev ua ntawm cov khoom siv no (xws li 18-8 thiab 18-10-3MO) yog tsim rau kev ua haujlwm ntawm qhov kub tsawg. Piv txwv, kev thauj cov kua roj, xws li roj, biogas, oxygen thiab nitrogen.

Lub hydraulic valve lub cev yog tsim rau corrosive nruab nrab ntawm -196 ~ 600 ℃ thiab ua haujlwm kub. Austenitic stainless hlau kuj zoo tagnrho rau cov hydraulic valve cev khoom siv.

8. Monel Alloy

'Monel' yog ib qho muaj roj qaum ncov qaum tooj xaim nchuav tag nrho uas muaj kev tiv thaiv zoo. Cov khoom siv no feem ntau siv rau hauv kev thauj mus los ntawm alkali, ntsev tov, khoom noj thiab ntau cov roj siv tsis tau hydraulic valve cev, tshwj xeeb tshaj yog sulfuric acid thiab hydrofluoric acid. 'Monel' cov phoojywg zoo tagnrho rau kev ua haujlwm, dej hiav txwv thiab dej nruab ntug. Nws yog tsuas yog tsim rau hydraulic valve lub cev muaj fluorine chlorate medium.

9. Haib Alloy

Feem ntau siv tau rau dilute sulfuric acid thiab lwm yam muaj zog corrosive medium hydraulic valve lub cev.

(1) 'Ha' alloy b

Cov hlau muaj 60% npib, 30% molybdenum thiab 5% hlau. Nws yog qhov tshwj xeeb yog lub zog rau qhov muaj zog ntawm corrosion inorganic acids, 'Ha' alloy 'B' rau ntau concentrations of hydrochloric acid yuav siv rau kub taw tes kub, thiab rau sulfuric acid, nyob hauv cov feem ntau corrosive ntau yuav siv tau 70 ℃ . Rau phosphoric acid, nws yuav siv nyob rau hauv ntau yam mob, thiab 'nws' alloy 'B' kuj yog tsim rau ammonium chloride, zinc chloride, txhuas sulfate thiab ammonium sulfate.

Nyob hauv ib qho chaw oxidising, 'Ha' alloy 'B' tuaj yeem siv li thaj tsam li 800 ℃, thiab nyob rau qhov chaw txo tsawg, qhov kub ntawd tuaj yeem siab dua.

(2) 'Ha' alloy C

Qhov no yog ib qho nickel luj alloy uas muaj 15% chromium thiab 17% molybdenum. Hauv ob oxidation thiab txo atmospheres, nws yuav siv tau rau 1100 ℃. Nws muaj corrosion kuj zoo rau hydrochloric acid, sulfuric acid thiab phosphoric acid. Thiab feem ntau, nws kuj siv tau rau nitric acid.

'Ha' alloy 'C' no muaj zog corrosion tsis ua hauj lwm rau cov chlorides, chlorides, sulfides, oxidizing ntsev thiab ntau lwm corrosive mediums. Nws tseem yog tshwj xeeb tshaj yog rau cov xov xwm zoo li halogen, xws li hydrofluoric acid.

$ tus naj npawb. Titanium

Qhov tseem ceeb muaj feem xyuam rau tag nrho cov hom muaj zog corrosive medium hydraulic valve lub cev.

$ tus naj npawb. Cam khwb cia tooj hlau

Muaj hydraulic valve Lub cev Muaj ntau ua los ntawm cov khoom tsis-ferrous, feem ntau tooj thiab tooj dag. Qhov kev faib ua feem ntawm tooj liab, tin, lead, thiab zinc hauv lub tshuab tooj hlau uas tsim tawm lub cev ntawm lub hydraulic valve feem ntau yog 85: 5: 5: 5 los yog 87: 7: 3: 3. Yog tias tsis zinc-dawb bronze yuav tsum tau, nws yuav tsum tau piav qhia. Lub zog ntawm lub cev, kev ruaj khov thiab txhuam kev ua haujlwm ntawm bronze ua nws tshwj xeeb tshaj yog tsim rau industrial ntau lawm. Muaj Bronze hydraulic valve lub cev ntim txog li 100 hli.

Bronze li qub feem ntau yog siv los ntawm ib nrab ntsuas kub, nrog qee cov qhab-nees muaj rau ntawm 280 ℃. Nyob rau hauv qhov kub tsawg, feem ntau tooj liab qoob loo muaj cov yam ntxwv ntawm kev ua pa ntawm qhov kub tsis tshua muaj siab, uas ua rau tooj siv dav hauv qab huab cua sov, xws li kua pa thiab kua nitrogen, uas nws qhov sov li ntawm 180 ℃.

$ tus naj npawb. Tsis tau. 20th Alloy

Nyob rau hauv tib co stainless hlau yog tsis muaj peev xwm rau heev nruj txoj kev tshwm sim, lub feem ntau txaus siab nyob rau hauv ib lub chav kawm ntawm hlau yog high hlau tsis muaj hlau stainless hlau. Tej zaum qhov feem ntau hom hlau alloy yog tsis muaj. 20th. Nws muaj 29% npib tsib khob, 20% chromium, plus molybdenum thiab tooj. Qhov no yog muaj zog tsis kam rau ntau yam kub thiab ntau ntawm sulfuric acid. Ntxiv mus, feem ntau, nws tuaj yeem siv tau rau hauv phosphoric acid thiab acetic acid media, tshwj xeeb tshaj yog thaum muaj cov tshuaj chlorides thiab lwm yam khoom muaj nqi.

$ tus naj npawb. Ob-txoj hlua hlau tsis zoo

Txoj kev loj hlob zoo ntawm ob sab phom tsis muaj steel hlau (ferrite qauv los yog austenite qauv). Cov hlau no muaj 20% los sis ntau tshaj ntawm cov chromium thiab 5% ntawm npib tsib xiv, thiab ib qho qis ntawm molybdenum, lub zog thiab qhov nyuaj ntawm cov kev sib thooj no dua li tus ciav hlau austenitic stainless, thiab hauv sulfuric acid thiab phosphoric acid hauv cov neeg pluag heev, kom tiv thaiv lub zos corrosion yog muaj zog heev.

Nws tsuas yog siv rau hydraulic valve lub cev ntawm kev ua haujlwm ntawm nruab nrab ntawm -273 ~ 200 ℃ pa pa dej thiab cov dej hiav txwv seawater.

$ tus naj npawb. Plastics, Ceramics

Tag nrho ob qho ntawm cov ntaub ntawv no yog non-metallic. Non-metallic khoom hydraulic valve lub cev qhov loj tshaj plaws yog tus corrosion kuj yog muaj zog, txawm muaj hlau siv hydraulic valve lub cev tsis muaj qhov kom zoo dua. Feem ntau siv rau lub siab lub npe pn≤1.6MPa, qhov kub ua haujlwm tsis yog ntau tshaj 60 ℃ corrosive medium, tsis muaj cov yas yas hydraulic valve lub cev kuj siv rau hauv kev lag luam dej. Yas, tej hub hydraulic valve feem ntau tsis tuaj yeem siv los ua hydraulic valve lub cev khoom, qhov xav tau steel hlau pob txha, cov hlua nrog yas, tej hub.