(Stainless steel) pob li qub thiab ntsaws li qub yog nyob rau tib hom li qub. Qhov txawv yog qhov qhib thiab kaw ib feem ntawm lub pob valve yog ib tug kheej kheej nrog rau hauv lub qhov. Qhov no sphere rotates nyob ib ncig ntawm cov kab nruab nrab ntawm lub valve qia kom ua tiav lub hom phiaj ntawm kev qhib thiab kaw.
1. Cov yam ntxwv tseem ceeb ntawm pob li qub:
Pob li qub yog qhov yooj yim hauv cov qauv, yooj yim rau kev khiav lag luam, thiab ruaj khov hauv kev ua haujlwm. Lawv feem ntau yog siv nyob rau hauv nruab nrab pipelines nrog ob-theem ntws, nrog me me ntws tsis kam thiab zoo sealing.
2. Kev ceev faj rau pob li qub:
1. Rau txoj kev nrog ib tug kov, kev khiav hauj lwm kov yog perpendicular mus rau lub ntws kev taw qhia ntawm lub nruab nrab thaum lub valve raug kaw, thiab nws yog raws li nyob rau hauv lub khiav kev taw qhia ntawm lub nruab nrab thaum lub valve qhib;
2. Lub rwb thaiv tsev pob valve yuav tsum tau them sai sai rau:
Lub valve tsuas yog qhib lossis kaw tom qab qhov nruab nrab melts; nws tsis tuaj yeem raug kaw lossis qhib kom tsis txhob muaj kev nyab xeeb.
Lub pob valve muaj peb qhov tseem ceeb: lub cev valve, qhib thiab kaw mechanism, thiab valve cover. Nws muaj peb yam nram qab no: qhib thiab kaw, tswj, thiab throttling.
Qhov tseem ceeb ntawm lub pob valve yog qhov kub thiab txias (qhov kub ntawm qhov nruab nrab dhau los ntawm lub pob valve), nominal siab (qhov siab tshaj plaws uas lub pob valve tuaj yeem tiv taus), thiab nominal txoj kab uas hla.
3. Cov teeb meem tshwm sim hauv kev siv pob li qub
1) Flange thiab xov xau (ua rau tsis zoo sealing);
2) Lub pob valve qia tsis tuaj yeem ua haujlwm (qhib thiab kaw cov teeb meem);
3) Internal leakage tsim los ntawm lub pob valve core thiab lub pob valve lub rooj zaum.