Nkhani - Kodi ndi ogulitsa ma valve 10 apamwamba padziko lonse lapansi ati?

Makampani 10 odziwika bwino opereka ma valve otsekedwa ndi awa:

Emerson, USA:

Kampani ya Fisher pansi pa Emerson imayang'ana kwambiri ma valve owongolera njira, omwe amagwiritsidwa ntchito kwambiri mu mafuta, gasi, mankhwala ndi zina.

Schlumberger, USA:

Cameron motsogozedwa ndi Schlumberger amapereka ma valve ndi zida zogwirira ntchito zamakampani amafuta ndi gasi.

Flowserve, USA:

Amapereka ma valve osiyanasiyana a mafakitale, kuphatikizapo ma valve owongolera, ma valve a mpira, ma valve a gulugufe, ndi zina zotero, zomwe zimatumikira mafakitale amagetsi, mankhwala ndi mankhwala ochizira madzi.

Tyco International, USA:

Mtundu wake wa Tyco Valves & Controls umapereka ma valve otetezera moto, mafakitale ndi malonda.

KITZ, Japan:

Mmodzi mwa opanga ma valve akuluakulu ku Japan, omwe ali ndi zinthu zokhudzana ndi mafakitale, zomangamanga ndi zomangamanga.

IMI, UK:

IMI Critical Engineering imayang'ana kwambiri ma valve apamwamba a mafakitale, omwe amapereka mphamvu, mphamvu ndi mankhwala m'mafakitale.

Crane, USA:

Kampani yake ya Crane ChemPharma & Energy imapereka mayankho a ma valve a mafakitale a mankhwala, petrochemical ndi mphamvu.

Velan, Canada:

Imayang'ana kwambiri ma valve a mafakitale, kuphatikiza ma valve a chipata, ma valve a mpira, ma valve a gulugufe, ndi zina zotero.

KSB, Germany:

Amapereka mayankho a pampu ndi ma valavu, omwe amagwiritsidwa ntchito kwambiri pochiza madzi, mphamvu ndi mafakitale.

Gulu la Weir, UK:

Kampani yake ya Weir Valves & Controls imayang'ana kwambiri ma valve ogwira ntchito bwino kwambiri m'migodi, magetsi, mafuta ndi gasi.

Malangizo:NWopanga ma valavu a SWndi kampani yodziwika bwino yogulitsa ma shutdown valve ku China. Ali ndi fakitale yawoyawo yopangira ma shutdown valve body ndi fakitale yopangira ma shutdown valve. Angakupatseni chithandizo chaukadaulo chaukadaulo komanso mitengo ya fakitale yopangira ma shutdown valve.

Valavu Yotseka (SDV)

Kodi Valavu Yotseka (SDV) ndi chiyani?

Valavu yotseka ndi mtundu wa actuator mu dongosolo lodziyimira pawokha. Imapangidwa ndi actuator ya diaphragm ya pneumatic ya masika ambiri kapena actuator ya piston yoyandama ndi valavu yowongolera. Imagwiritsidwa ntchito makamaka kudula kapena kulumikiza madzi mwachangu mupaipi (monga mpweya, mpweya woyaka, mpweya wozizira ndi mpweya wotuluka, ndi zina zotero). Imagwiritsidwa ntchito kwambiri mumakina owongolera chitetezo m'mafakitale komanso posamalira ngozi zadzidzidzi.

Ntchito Yaikulu ndi Mfundo Yogwirira Ntchito ya Shutdown Valve

Ntchito yaikulu ya valavu yozimitsa ndi kudula mwachangu, kulumikiza kapena kusintha madzi omwe ali mu payipi polandira chizindikiro cha chida chowongolera (monga kuthamanga kwa mpweya, kutentha kapena alamu yotulutsa mpweya). Kayendedwe kake ka nthawi zonse kamaphatikizapo:

Chizindikiro cha kuukira:Sensa ikazindikira vuto (monga kutuluka kwa mpweya, kuthamanga kopitirira malire), chizindikirocho chimatumizidwa ku actuator.

Yankho la makina:Diaphragm kapena makina a pistoni ozungulira mpweya amachititsa kuti thupi la valavu liziyenda (monga valavu ya mpira, valavu ya mpando umodzi), kusintha momwe valavu imatsegukira komanso momwe imatsekera.

Chitetezo Chotseka:Pambuyo poti valavu yozimitsa mwadzidzidzi yatsekedwa, nthawi zambiri imapangidwa kuti izidzitsekera yokha kuti isatseguke mwangozi.

Mitundu yayikulu ndi zochitika zogwiritsira ntchito valve yotseka

Ma valve otsekaZitha kugawidwa m'magulu otsatirawa malinga ndi kapangidwe kake ndi cholinga chake:

‌Ma valve okhazikika otsekeka:amagwiritsidwa ntchito powongolera njira zamafakitale (monga makampani opanga mankhwala ndi zitsulo), makamaka pogwiritsa ntchito valavu ya mpira kapena kapangidwe ka valavu yamanja kuti akwaniritse malamulo apakatikati oletsa kugwedezeka.

Valavu yotseka mwadzidzidzi:yodzipereka ku machitidwe achitetezo (monga mapaipi a gasi ndi machitidwe a SIS), yokhala ndi liwiro loyankha mwachangu komanso ntchito yodzitsekera yokha kuti ngozi zisakule.

Valavu yotseka ya diaphragm ya pneumatic:Valavu imayendetsedwa ndi diaphragm yoyendetsedwa ndi mpweya, yomwe ndi yoyenera pazochitika zowongolera zokha (monga mafakitale amafuta ndi magetsi).