Kuv. Kev seuing system tsis ua hauj lwm
Sealing nto kev ua haujlwm tsis xws luag
Irregular Sealing Deg Sib Tsoo lossis muaj cov kab nrib pleb / khawb, tiv thaiv cov kab ntim tau zoo
Kev hnav nrawm vim yog cov khoom tawv tawv ntawm cov ntaub ntawv sealing (substardard overlay vuam / Kev Kho Tshav Kub Overlay
Kev siv tawv me me ua kom cov chaw pipeline txaus)
Dynamic kev puas tsuaj rau kev sib khi ua ke
Hnav lossis tsis raug cai ntawm cov qia-kaw kev sib txuas, ua rau kaw misalignment
Kev Sib Nrauj Micro-Nres Los Ntawm Cov Khoom Siv Hluav Taws Xob (tom qab kaw sai sai txias txias)
Saib cov ntaub ntawm cov muag muag muag (piv txwv li, PTFE) vim tias tsis muaj teeb meem
Ii. Cov khoom siv thiab chaw tsim khoom tsis xws luag
Cov Txheej Txheem Txheej Txheem Muaj Zog
Casting voids lossis vuam tsis xws luag nyob rau hauv valve lub cev (ib txwm muaj nyob rau hauv qis-siab li qub)
Insufficient manufacturing precision of balls/seats (roundness deviation >0. 02mm)
Cov Khoom Siv Xaiv Yuam Kev
Corrosion tsis kam misnatch ntawm sealing cov ntaub ntawv thiab nruab nrab (piv txwv li, clj attack)
Stem bending deformation from inadequate material stiffness (deflection >1‰)
III. Kev ua haujlwm thiab saib xyuas tsis raug
Tsis tsim nyog ua haujlwm valve ua haujlwm
Sealing Deg vau los ntawm ntau dua-Torque kaw (tshaj li cov kev txwv tsis pub)
Qia xov kev puas tsuaj los ntawm kev sib hloov sib hloov hauv qee qhov qhib lub xeev
Txij Nkawm Kev Lag Luam
Tsis txaus / incomple greated txhaj tshuaj (viscosity mismatch)
Lub caij nplooj hlav corrosion los ntawm kev cia siab
IV. Kev teeb tsa thiab cov teeb meem kev tsim kho
Cov txheej txheem sib dhos ua tiav
Valve core-seat centerline misalignment (>0. 5 hli)
Non-uniform flange bolt preload (torque deviation >15%)
Ib puag ncig tswj lapses
Thermal deformation from welding with stem intact (temperature rise >200 degree)
Blocky blockage-inducation foob kev puas tsuaj vim ploj mus tiv thaiv dawb
Qhov tseem ceeb parameter thresh
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Ua Tsis Taus Hom |
Tseem ceeb pib |
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Sealing nto tiaj |
Tsawg dua los yog sib npaug rau 0. 001 hli (tom qab sib tsoo) |
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Txiv kab ncaj |
Tsawg dua los yog sib npaug rau 1 hli / m |
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Kev Txhaj Tshuaj Yooj Yim |
1. {2-1. 5 × nruab nrab siab siab siab |
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Flange Bolt Preload Torque |
ASME B16.5 Txheem ± 5% kam |