Ivalvu yeBhola yeDbb ephindwe kabini kunye neValve yeBhola ePhephayo eTshayina
Yintoni ivalvu yebhola yeDBB?
I-Block ephindwe kabini kunye neValve yeBhola eyophayoyivalvu yebhola eyenzelwe ngokukodwa.
Ngokuphathelele inkqubo ye-Double block kunye ne-bleed valve, kukho iinkcazo ezimbini ze-API6D kunye ne-OSHA.
I-API 6D ichaza iI-Block ephindwe kabini kunye neValve yokuPhephaInkqubo "njengevalvu enye enendawo ezimbini zokuhlala, xa ivaliwe, inika isitywino nxamnye noxinzelelo oluvela kumacala omabini evalvu ngendlela yokukhupha/ukukhupha igazi kumngxuma ophakathi kweendawo zokuhlala."
I-OSHA ichazaI-Block ephindwe kabini kunye neValve yokuPhephaInkqubo "njengokuvalwa komgca, umbhobho, okanye umbhobho ngokuvala nokutshixa okanye ukufaka iithegi kwiivalvu ezimbini ezingaphakathi kunye nokuvula nokutshixa okanye ukufaka iithegi kwivalvu yokukhupha amanzi okanye yokungenisa umoya kumgca ophakathi kweevalvu ezimbini ezivaliweyo".
iI-NORTECH ibhloko ephindwe kabini kunye nevalvu yebhola ephuma igaziyenzelweNgokudibanisa iivalvu ezimbini zibe ngumzimba omnye, uyilo lweevalvu ezimbini lunciphisa ubunzima kunye neendlela zokuvuza ezinokubakho ngelixa luhlangabezana neemfuno ze-OSHA zokuvimba kabini kunye nokuphuma kwegazi.
Iimpawu eziphambili zevalvu yebhola yeDBB
Iyunithi enyeIvalvu yeBhola yeDBBInika ibhloko ephindwe kabini kwaye ikhupha igazi kwivalvu enye. Olu hlobo lunokwahlula imibhobho kumacala omabini evalvu ukuze kuphume/kukhutshwe igazi kwivalvu ephakathi kwezihlalo.
Ivalvu yeBhola yeDBBludibaniso lwe-block/isolation valve enye okanye ezingaphezulu, ngokuqhelekileyo ii-ball valves, kunye ne-bleed/vent valve enye okanye ezingaphezulu, ngokuqhelekileyo ii-ball okanye ii-needle valves. Injongo ye-block kunye ne-bleed valve system kukwahlula okanye ukuvimba ukuhamba kolwelo kwinkqubo ukuze ulwelo oluvela phezulu lungafikeleli kwezinye iindawo zenkqubo ezisezantsi. Oku kwenza iinjineli zikwazi ukuphuma okanye zikhuphe okanye zikhuphe ulwelo oluseleyo kwinkqubo kwicala elisezantsi ukuze zenze umsebenzi othile (ukugcinwa/ ukulungiswa/ ukutshintshwa), ukuthatha iisampulu, ukuphambuka kokuhamba kwamanzi, ukufakwa kweekhemikhali, ukujonga ukuthembeka kokuvuza njl.
Ukusebenzisa inkqubo ye-single unit double block kunye ne-bleed valve xa kuthelekiswa nee-valve ezintathu ezahlukeneyo kusindisa ixesha lokufaka, ubunzima kwinkqubo yepayipi, kunye nendawo. Olu yilo lukwaneenzuzo zokusebenza,
- Zimbalwa kakhulu iindlela ezinokuthi zivuza ngaphakathi kwecandelo eliphindwe kabini kunye neliphuma igazi lombhobho.
- Iivalvu zigcwele kwaye aziphazanyiswa kukuhamba kwamanzi, kwaye uxinzelelo lwazo alunakuncipha kakhulu kwiyunithi.
- Iipayipi apho ezi valve zifakelwa khona nazo zingafakwa ihagu ngaphandle kweengxaki.
Iinkcukacha zobugcisa zevalvu yebhola yeDBB
Umboniso weMveliso: Ivalvu yebhola yeDBB
Ukusetyenziswa kwevalvu yebhola yeDBB
Ivalvu yebhola yeDBBZisetyenziswa kakhulu kwishishini leoyile negesi, kodwa zinokuba luncedo nakwezinye iindawo ezininzi. Zisetyenziswa rhoqo apho kufuneka kuphume igazi kwivalvu, apho imibhobho ifuna ukwahlulwa ukuze ilungiswe, okanye nakweyiphi na kwezi meko zilandelayo:
- Thintela ungcoliseko lwemveliso.
- Susa izixhobo ezisetyenziswayo xa zicocwa okanye zilungiswa.
- Ukulinganiswa kwemitha.
- Hlukanisa izixhobo ezifana nezikhombisi zoxinzelelo kunye neegeyiji ze-lever.
- Inkqubo ephambili yomphunga.
- Zicime kwaye ukhuphe izixhobo zokulinganisa uxinzelelo.
