Dab tsi yog qhov txawv ntawm rooj vag valve thiab npauj npaim valve

Nkag siab qhov sib txawv ntawm Lub Rooj vag Valve thiab Npauj Npaim Valve hauv kev xaiv cov kav dejyog qhov tseem ceeb rau kev ua haujlwm zoo thiab kev nyab xeeb. Txawm hais tias ob qho tib si yog siv rau cov kua kaw- tawm, lawv txawv heev hauv kev sib khi, cov yam ntxwv ntawm kev ua haujlwm, thiab cov xwm txheej siv tau. Kab lus no txheeb xyuas qhov sib txawv ntawm qhov sib txawv ntawm npauj npaim valve thiab lub rooj vag valve raws li cov txheej txheem kev lag luam thiab cov qauv kev lag luam, thiab pab koj xaiv lub rooj vag thiab npauj npaim li qub.

I. Cov qauv thiab Flow Resistance sib txawv

A rooj vag valveua tiav rau / tawm los ntawm kev txav ntsug ntawm lub rooj vag. Thaum qhib tag nrho, txoj kev ntws ncaj nraim thiab tsis muaj kev cuam tshuam, uas ua rau muaj qhov tsis tshua muaj dej tsis txaus siab coefficient (Cv tus nqi kwv yees li 0.05-0.1 rau DN200). Anpauj npaim valveua haujlwm ntawm 90℃kev sib hloov ntawm lub disc; Txawm tias thaum qhib tag nrho, lub disc thiab qia tseem nyob hauv ib feem ntawm qhov ntws hla -section, muab cov dej tsis kam tiv thaiv feem ntau ntawm 0.2 thiab 0.5. Rau triple-offset npauj npaim li qub, qhov no tuaj yeem ua kom zoo rau ib puag ncig 0.15.

II. Sealing Performance thiab Leakage Classes

Lub rooj vag li qub siv hlau sealing nto (lapped rau Ra Tsawg dua lossis sib npaug li 0.2μm). Raws li API 598, pneumatic xeem yuav tsum xoom xau, ntsib ANSI/FCI 70-2 Chav Kawm VI. Npauj npaim li qub qhia tau hais tias muaj ntau qhov sib txawv hauv cov chav kawm to: resilient- rooj npauj npaim li qub (EPDM / PTFE lub rooj) tuaj yeem ua tiav Chav Kawm VI ntawm qhov kub thiab txias, tab sis siab dua 120℃roj hmab kev laus nce mus rau Chav Kawm III-IV. Triple-offset hlau-seated npauj npaim li qub (graphite sealing) tuaj yeem ua tiav bidirectional xoom xau (ISO 5208 Rate A) txog li 425℃.

III. Kev khiav hauj lwm ceev thiab Torque

Lub rooj vag li qub xav tau ntau lub log log (txog 12-18 lem rau DN150 Chav Kawm 150), ua rau lub sijhawm ua haujlwm ntev, tab sis lub zog ruaj khov. Npauj npaim li qub xav tau tsuas yog 90℃kev sib hloov, ua tiav tag nrho kev mus ncig hauv 5-15 vib nas this, ua rau lawv tsim nyog rau kev kaw nrawm- tawm lossis ua haujlwm tsis tu ncua. Lus Cim: Npauj Npaim li qub tau ntsib lub siab tshaj plaws torque (2-3 zaug khiav torque) hauv 10℃-20℃kawg ua ntej kaw - actuator sizing yuav tsum suav nrog cov npoo.

IV. Siab, Kub, thiab Qhov Loj Loj

✔️ Siab:Lub rooj vag li qub tuaj yeem ncav cuag Chav Kawm 2500 (42 MPa). Cov pa npauj npaim li qub feem ntau yog Chav Kawm 150 (1.6 MPa); siab -kev ua tau zoo npauj npaim li qub mus txog Chav Kawm 300; reinforced triple-offset npauj npaim li qub tuaj yeem ua tiav Chav Kawm 600 (11.0 MPa).

✔️ Kub:Cov rooj vag li qub ua haujlwm ntawm -196℃txog 650℃(tsawg-kub steel rau chrome-moly steel). Mos- rooj npauj npaim li qub yog txwv rau 80-200℃(nyob ntawm cov khoom siv lub rooj zaum). Triple-offset npauj npaim li qub nrog 425 degree.

✔️Size:Kev lag luam loj loj rau cov rooj vag li qub yog DN50-DN600. Tshaj li DN1200, qhov hnyav nce ntau heev (lub rooj vag DN900 hnyav txog 8 tons). Npauj npaim li qub yog paub tab rau DN25-DN3000; DN2000 npauj npaim valve hnyav txog 2-3 tons, thaum lub rooj vag valve ntawm tib qhov loj tshaj 20 tons.

V. Kev Txhim Kho, Kev Kho, thiab Kev Sib Piv Tus Nqi (DN300 Chav Kawm 150 Carbon Steel)

Lub rooj vag valve muaj qhov ntev ntawm cov qauv ntawm 600 hli, hnyav, thiab yuav tsum tau ua kom tiav disassembly thiab lapping ntawm sealing nto rau kev kho. Lub wafer npauj npaim valve muaj qhov ntev ntawm 60-70 mm, qhov hnyav ntawm 70% -80%, thiab lub rooj foob tuaj yeem hloov pauv hauv online. Cov nqi siv: cam khwb cia steel rooj vag valve 2,500-4,000USD; resilient-seatedbutterflyvalve2,500-4,000USD;resilient-seatedbutterflyvalve600-900 USD; ob npaug-offset siab-kev ua tau zoo npauj npaim valve 1,400–2,200USD; triple−offsetbutterflyvalve1,400–2,200USD; triple−offsetbutterflyvalve2,800–3,800 USD.

VI. Cov txheej txheem xaiv

• Tight kaw-tawm yuav tsum tau ua haujlwm tsis tu ncua (piv txwv li, boiler feedwater)→ Xaivrooj vag valve.
• Txoj kab uas hla loj, dej los yog roj av, nquag caij tsheb kauj vab, lossis qhov chaw txwv→ Xaivnpauj npaim valve.
• Kev kub siab, siab siab, thiab xoom xau yuav tsum tau→ Ob leeg triple-offset hlau- rooj npauj npaim valve lossis lub rooj vag valve tau txais, tab sis txheeb xyuas hluav taws- ntawv pov thawj nyab xeeb (API 607 ​​/ ISO 10497).
• Media uas muaj cov khoom siv los yog kev yaig siab→ Lub rooj vag valve wedge grooves zoo li khaws cov khib nyiab; npauj npaim valve disc ntug yog nquag hnav. Ntsuas qhov kev daws teeb meem tshwj xeeb.

📌 Tom qab nkag siab qhovQhov sib txawv ntawm lub qhov rooj valve thiab npauj npaim valve, nws raug pom zoo kom npaj cov kev qhia tshwj xeeb ncaj qha raws li API 602/609 thiab MSS SP-67, sib txuas cov ntaub ntawv ntsuas thiab cov txheej txheem ua haujlwm kom ntseeg tau tias lub sijhawm ua haujlwm ruaj khov.