I-Block ephindwe kabini kunye neValve yeBhola eyophayo
Yintoni ivalvu yebhola ephindwe kabini kunye nevalvu yebhola ephuma igazi?
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 ze-Double block kunye ne-bleed ball valve
I-Block ephindwe kabini kunye neValve yeBhola eyophayoludibaniso 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.
Iyunithi enyeI-Block ephindwe kabini kunye neValve yokuPhephaInika ibhloko ephindwe kabini kwaye ikhupha igazi kwivalvu enye. Olu hlobo lunokwahlula imibhobho kumacala omabini evalvu ukuze kuphume/kukhutshwe igazi kwivalvu ephakathi kwezihlalo.
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.
- Zonke izinto zevalvu zigcinwe kwiyunithi enye, indawo efunekayo yokufakela incitshiswa kakhulu ngaloo ndlela kuvulwa indawo yezinye izixhobo ezibalulekileyo.
- Kufuneka amaxesha amafutshane okukhupha amanzi.
Iinkcukacha zobugcisa ze-Double block kunye ne-bleed ball valve
Umboniso weMveliso:
Ukusetyenziswa kweevalvu zebhola eziblokiweyo ezimbini kunye ne-bleed ball
Iivalvu zebhola eziblokiweyo kabini kunye nezopha igaziZisetyenziswa 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.
- Inkonzo yolwelo kufutshane nemijelo yamanzi okanye oomasipala.
- Uthumelo kunye nokugcinwa.
- Ukufakwa kweekhemikhali kunye nokuthathwa kweesampuli.
- Hlukanisa izixhobo ezifana nezikhombisi zoxinzelelo kunye neegeyiji ze-lever.
- Inkqubo ephambili yomphunga.
- Zicime kwaye ukhuphe izixhobo zokulinganisa uxinzelelo.
