Khoom piav qhia:
microfiber paj rwb twisted yarn
Nqe: Tus nqi hloov pauv vim tus nqi khoom siv thiab tus nqi pauv. Thov muab koj cov ntaub ntawv tiv tauj rau kuv, Kuv yuav hloov kho tus nqi tshiab tshaj rau koj
Yam khoom: | API 6D Ob Chav Thaiv thiab Bleed Pob Valve |
Khoom siv: | ASTM A105, A182 F304, 316 |
Ua haujlwm siab: | CLASS: 150 LB, 300 LB, 600 LB, 900 LB, 1500 LB |
Nominal Dia: | NPS232",DN50300mm |
Ua haujlwm kub: | -29to425ºC |
Shipping Ntim: | 20-25 hnub ua haujlwm; xa los ntawm nkoj los ntawm Ningbo chaw nres nkoj lossis Shanghai chaw nres nkoj |
Product Description
API 6D Double Block and Bleed Ball Valve: DBB Ball Valve is a combination of one or more block/isolation ball valves, and one or more bleed/vent valves, usually ball or needle valves. Double block and bleed valves operate on the principle that isolation can be achieved from both the upstream and downstream process flow / pressures. This is achieved by two ball, gate, globe, needle, etc. Valves placed back to back, with a third "isolatable" Valve in the centre cavity.
Feem ntau, muaj ob hom kev thaiv ob npaug thiab lub pob los ntshav, raws li kev paub dhau los ntawm cov neeg siv khoom thov.
Hom 1- Lub Pob Valve Nrog Ob Lub Pob Thiab Lub Pob Valve
Ob chav thaiv thiab ntshav pob valve muaj ib lub cev tsim nrogob lub npasthiabib rab koob valve, rab koob valve yog ntsia nruab nrab ntawm cov pob ntxaib. Ob chav thaiv thiab los ntshav pob li qub muaj nyob rau hauv ob- kev taw qhia foob hauv cov hlau zaum thiab mos zaum, nrog npuas nruj kaw.
Ob Chav Thaiv thiab Bleed Pob Valve Nrog Twin Pob Thiab Lub Pob Valve
Ob Chav Thaiv thiab Bleed Pob Valve Flanged RTJ EndsNPT Xaus
Hom 2-A Trunnion Mounted Pob Valve Nrog Ob Chav Thaiv thiab Bleed Funtion
Hom no ob chav thaiv thiab los ntshav pob valve yog lub trunnion mounted pob valve nyob rau hauv lub kaw txoj hauj lwm, muab ib tug foob tiv thaiv lub siab los ntawm ob hnub kawg ntawm lub valve nrog ib tug txhais tau tias ntawm vending / los ntshav cov kab noj hniav ntawm cov chaw zaum.
According to API 6D "Specification for Pipeline Valves" standards, a ob chav thaiv thiab ntshav pob valve (DBB pob valve) is a "single valve with two seating surfaces that, in the closed position, provides a seal against pressure from both ends of the valve, with a means of venting/bleeding the cavity between the seating surfaces.
Raws li cov lus txhais, ob chav thaiv thiab lub pob valve muaj ob lub rooj zaum, txhua lub rooj zaum muab lub foob tiv thaiv kev sib cais. Qhov ntawd yog hais tias ib lub rooj zaum yog kaw cov kua dej los ntawm cov dej ntws thiab lwm lub rooj yog kaw cov kua dej los ntawm cov dej ntws. Rau ob chav thaiv thiab los ntshav trunnion mounted pob valve, thaum lub valve nyob rau hauv qhov chaw kaw thiab cov kua dej los ntawm cov dej ntws, nws thawb lub rooj zaum tawm tsam lub pob kom paub txog kev sib khi. Lwm lub rooj zaum yog sealing tib yam.
Kev ua haujlwm ntawm qhov cua / los ntshav ua haujlwm li cas? Thaum lub raj xa dej nrog lub siab, lub trunnion pob valve raug kaw nrog cov kua ntim hauv lub pob thiab tom qab ntawd muaj lub siab nyob hauv lub pob. Thaum qhov kub ntawm lub pob nce siab, lub siab ntawm lub pob yuav nce siab thiab. Nws yog ib qho tsim nyog yuav tsum tau tso pa tawm / los ntshav lub siab yog tias muaj kev pheej hmoo thaum lub siab hauv lub pob tau siab txaus. Rau lub trunnion pob valve nrog los ntshav ua haujlwm, lub siab hauv lub pob thawb lub rooj zaum rov qab thaum lub caij nplooj ntoos hlav tom qab lub rooj zaum compresses. Tom qab ntawd qhov muaj qhov cua / los ntshav ntawm qhov chaw sib khi. Feem ntau hais lus, qhov tso pa tawm / los ntshav yog xav tau ntawm qhov siab ntawm tsawg dua 1.33 npaug ntawm qhov kev ntsuas siab tsim rau lub pob li qub raws li API 6D specifications. Qee qhov kev thov tseem ceeb rau qhov cua / los ntshav ntawm qhov siab ntawm tsawg dua 1.1 npaug ntawm qhov kev ntsuas siab tsim. (xws li. Rau PN20 trunnion pob valve, lub siab nyob rau hauv lub pob yuav tsum vent / los ntshav ntawm lub siab ntawm tsawg tshaj li 2.2 Mpa).
Yuav ua li cas yog ib tug ob chav thaiv thiab los ntshav pob valve?
Tshem tawm qhov tso tawm valve, thaum lub valve nyob rau hauv tag nrho kaw txoj hauj lwm thiab ob qho tag nrho ntawm lub valve yog pressurized nyias, los xyuas cov leakage ntawm tso valve postion.
Yuav nrhiav dab tsi thaum xaiv ob lub thaiv thiab lub pob valve?
Raws li nrog rau txhua lub valve, thaum xaiv, ib tug yuav tsum xav txog cov kua dej, siab, kub. Tej zaum qhov tseem ceeb tshaj plaws, txawm li cas los xij, yog li cas lub valve yuav siv. Nrog ib tug xov tooj ntawm configurations muab, xav txog qhov twg ntawm cov no yuav haum koj cov txheej txheem thiab xav tau kev pab zoo tshaj plaws.
If you're unsure which double block and bleed ball valve is right for you process, talk to our engineer. They can help determine which one will achieve your objectives best.
Cim npe nrov: pib 6d ob thaiv thiab ntshav pob val
