Qhov twg yog qhov zoo dua: Pob Valve lossis rooj vag Valve?

Qhov twg yog qhov zoo dua: Pob Valve lossis rooj vag Valve?

Hauv kev lag luam piping systems, pob li qub thiab rooj vag li qub yog ob hom kev sib cais ntau tshaj plaws. Cov neeg siv feem ntau nug "qhov twg yog qhov zoo dua," tab sis cov lus teb nyob ntawm cov txheej txheem tsis. Kab lus no muab kev sib piv ntau los ntawm peb yam: cov yam ntxwv ntawm kev ua haujlwm, kev sib khi tshuab, thiab kev tshaj tawm, raws li API 608 (tus qauv pob valve) thiab API 600 ( rooj vag valve tus qauv).

✔️ Kev khiav hauj lwm ceev & zaus
Pob li qub siv 90℃kev sib hloov rau qhib / kaw. Rau qhov loj ntawm DN100, lub sijhawm tag nrho cov hlab ntsha feem ntau yog tsawg dua 2 vib nas this. Lub rooj vag li qub xav tau ntau lub log tsheb. Noj DN100, Chav Kawm 150 ua piv txwv, los ntawm kev kaw tag nrho mus rau qhov qhib siab xav tau txog 12-15 lem, siv ntau tshaj 20 vib nas this. Yog li ntawd, nyob rau hauv daim ntawv thov nrog ntau tshaj 10 cycles ib teev, lub pob li qub qhia tau hais tias qis dua txhua yam hnav dua li lub rooj vag li qub.

✔️Sealing Principple & Leakage Rate
Pob li qub nrog cov rooj zaum mos (PTFE / RPTFE) tuaj yeem ua tiav ISO 5208 Rate A (zero pom leakage) ntawm qhov kub thiab txias.Rooj vag li qubsiv hlau- rau- hlau sealing; Txawm tias cov khoom lag luam tshiab, lawv cov kev xa tawm sab hauv feem ntau yog Rate D (tsawg me me ntawm cov xau raug tso cai). Lub chaw tsim khoom lag luam cov ntaub ntawv txheeb xyuas: tom qab ob xyoos ntawm kev ua haujlwm, 23% ntawm cov rooj vag li qub tau ntsib qhov xau nce mus rau tus nqi C vim lub rooj zaum khawb lossis tso nyiaj, thaum tsuas yog 3% ntawm pob li qub tau ua tib yam.

✔️ Media Suitability
Rau cov kua dej uas muaj cov khoom nyuaj (xws li slurry, xuab zeb- loaded circulating dej), lub wedge- zoo li tus disc ntawm lub rooj vag valve presses particles rau hauv lub sealing ntsej muag thaum kaw, ua rau grooves. Lub pob hauv lub pob valve tuaj yeem txiav cov khoom thaum sib hloov, thiab lub rooj zaum muaj tus kheej - so cov nyhuv. Chav tshuab yog qhov sib txawv: thaum qhov kub siab tshaj 200 degree, PTFE rooj zaum soften. Hauv qhov no, lub rooj vag li qub (nrog Stellite hardfacing ntawm lub rooj zaum) yuav tsum tau xaiv. API 600 qhia tau hais tias lub rooj vag li qub tuaj yeem siv rau cov chav ua haujlwm superheated txog 550 degree.

✔️ Kev Ruaj Ntseg & Kev Siv Hluav Taws Xob
Nyob rau hauv txoj hauj lwm qhib tag nrho, lub pob li qub muaj txoj hauv kev puv nkaus (sib npaug ntawm cov yeeb nkab sab hauv txoj kab uas hla), nrog rau kev khiav hauj lwm coefficient ζ ≈ 0.05-0.1. Lub rooj vag li qub muaj txoj hauv kev ncaj nraim tab sis nrog ib kauj ruam me me ntawm lub rooj zaum, ζ ≈ 0.1-0.2. Rau qhov ntev -kab raj xa dej, hloov 100 lub rooj vag li qub nrog 100 lub pob li qub tuaj yeem txuag tau li 4% -7% ntawm cov twj siv hluav taws xob hauv ib xyoos (raws li kev suav cov dej dynamics).

📌 Xaus
Tsis txhob poob rau "qhov twg yog qhov zoo dua." Qhov kev txiav txim siab logic yog raws li nram no:

• Kev ua haujlwm tsis tu ncua, xoom xaim yuav tsum tau, tshaj tawm nrog cov khoom → Xaiv cov pob li qub (mos-seated lossis hlau-seated).
• Cov chav kub kub, cov kua dej huv, ua haujlwm tsis tu ncua → Xaiv lub rooj vag li qub (khob los yog hom sib npaug).
• Rau txoj kab uas hla loj (Ntau dua lossis sib npaug ntawm DN300) thiab kev kub ntxhov siab (Ntau dua lossis sib npaug ntawm Chav Kawm 900), cov khoom ntxiv xws li lub zog, hom actuator, thiab cov nqi kho yuav tsum raug ntsuas.