Kodi ma valve a mpira opindika angagwiritsidwe ntchito chiyani:

Kodi valavu ya mpira wopindika ndi chiyani?

Valavu ya mpira wopindikandi mtundu wa valavu yozungulira kotala yomwe imagwiritsa ntchito mpira wopanda kanthu, wobowoka, komanso wozungulira kuti ilamulire kuyenda kwa madzi. Mawu akuti "flanged" amatanthauza njira yolumikizira valavu: imakhala ndi ma flanges kumapeto onse awiri, omwe amamangiriridwa ku ma flanges ofanana pamapaipi kapena zida. Kapangidwe kameneka kamatsimikizira kulumikizana kolimba, kosataya madzi, zomwe zimapangitsa ma flanges a mpira kukhala abwino kwambirikuthamanga kwambirindikutentha kwambirimapulogalamu.

Mpira womwe uli mkati mwa valavu uli ndi bowo pakati pake. Valvu ikatsegulidwa, bowolo limagwirizana ndi njira yoyendera, zomwe zimathandiza kuti madzi azidutsa. Kuzungulira chogwirira kapena choyendetsera magetsi ndi madigiri 90 kumatseka valavu, ndikuyika bowolo molunjika ku kayendedwe ka madzi ndikuliletsa. Ma valavu a mpira opindika amadziwika kuti ndi odalirika, amagwira ntchito mwachangu, komanso kuti mphamvu zawo sizichepa.

Kukula, Zipangizo, ndi Kupanikizika kwa Ma Valves a Flanged Ball

Kukula kwa Kukula

Ma valve a mpira opindika amapezeka m'mitundu yosiyanasiyana kuti agwirizane ndi machitidwe osiyanasiyana a mapaipi:

• M'mimba mwake:Kawirikawiri kuchokera½ inchi (DN15)kuMainchesi 48 (DN1200).
• Kukula Kofanana:2″, 4″, 6″, 8″, 10″, ndi 12″ amagwiritsidwa ntchito kwambiri m'mafakitale.

Zosankha Zazinthu

Kusankha zinthu kumadalira mtundu wa madzi, kutentha, ndi momwe zinthu zilili:

1. Zipangizo za Thupi:
   • Chitsulo cha Kaboni (WCB):Kwa ntchito zanthawi zonse.
   • Chitsulo Chosapanga Dzira (SS304, SS316):Yosagonjetsedwa ndi dzimbiri m'malo okhala ndi mankhwala kapena m'nyanja.
   • Chitsulo cha Aloyi (WC6, WC9):Kukana kutentha kwambiri.
   • Chitsulo cha Duplex:Kwa atolankhani aukali monga madzi a m'nyanja.
   • PVC/CPVC:Yopepuka komanso yosagwira dzimbiri pamakina opanda mphamvu zambiri.
2. Zipangizo za Mpando ndi Chisindikizo:
   • PTFE (Teflon):Kukana mankhwala ndi kukangana kochepa.
   • Mipando yachitsulo (Chitsulo chosapanga dzimbiri):Kulimba kwa kutentha kwambiri.
   • Ma Elastomer (EPDM, NBR):Za machitidwe a madzi ndi gasi.

Kupanikizika kwapakati

Ma valve a mpira opindika amayesedwa kutengera magulu opanikizika wamba:

• Makalasi a ASME:Kalasi 150, 300, 600, 900, 1500, ndi 2500.
• Kuthamanga kwa Magulu:Kuchokera150 PSI (10 bala)ku5,000 PSI (345 bala).

Kugawa Ma Valves a Mpira Wopindika

Ma valve a mpira opindika amagawidwa m'magulu kutengera kapangidwe ndi magwiridwe antchito:

1. Ndi Kapangidwe:

   • Doko Lonse (Lodzaza Lonse):Chitoliro cha bore chikugwirizana ndi chizindikiritso cha chitoliro, zomwe zimachepetsa kuletsa kwa madzi kuyenda.
   • Doko Lochepetsedwa (Bore Yokhazikika):Chibowo chaching'ono cha ntchito zotsika mtengo.

2. Ndi Kapangidwe:

   • Mpira Woyandama:Mpirawo umakhala ndi mipando iwiri pamalo pake; yoyenera kugwiritsa ntchito makina otsika mphamvu.
   • Mpira Wokwezedwa ndi Trunnion:Mpirawo umamangidwa ndi trunnion kuti ukhale wolimba komanso wolimba.

3. Ndi Ntchito:

   • Njira Ziwiri (Madoko Awiri):Kulamulira koyambira kwa kuyatsa/kutseka kwa madzi.
   • Njira Zitatu (Madoko Atatu):Kwa kupotoza kapena kusakaniza madzi oyenda.
   • Ma Vavu a Mpira wa V-Port:Kuwongolera kayendedwe ka madzi molondola ndi chibowo chooneka ngati V.

Ubwino wa Ma Valves a Mpira Wopindika

1. Kapangidwe Kosalola Kutuluka kwa Madzi:Malumikizidwe opindika amaonetsetsa kuti zitseko zake zitsekedwa bwino pansi pa kupanikizika kwakukulu.
2. Kulimba:Kapangidwe kolimba kamalimbana ndi kuwonongeka, dzimbiri, komanso kupsinjika ndi kutentha.
3. Ntchito Yachangu:Kuzungulira kwa madigiri 90 kumathandiza kutsegula/kutseka mwachangu.
4. Kusamalira Kochepa:Zigawo zochepa zosunthika zimachepetsa zosowa zautumiki.
5. Kusinthasintha:Zimagwirizana ndi zakumwa, mpweya, ndi slurry.
6. Kuyenda kwa Mayendedwe Awiri:Yoyenera machitidwe omwe amafuna kutembenuka kwa kayendedwe ka madzi.

Kugwiritsa Ntchito Ma Valves a Mpira Wopindika

Ma valve a mpira opindika amagwiritsidwa ntchito m'mafakitale osiyanasiyana chifukwa cha kusinthasintha kwawo:

1. Mafuta ndi Gasi:

   • Kupatula mapaipi, kuyang'anira zitsime, ndi makina opangira mafuta oyeretsera.
   • Zipangizo: Chitsulo cha kaboni kapena chitsulo cha duplex choteteza mpweya wowawasa.

2. Kukonza Mankhwala:

   • Kusamalira madzi owononga monga ma acid ndi zosungunulira.
   • Ma valve okhala ndi PTFE kuti agwirizane ndi mankhwala.

3. Kuchiza Madzi:

   • Kupereka madzi kwa boma, njira zoyeretsera zinyalala, ndi malo oyeretsera madzi.
   • Zisindikizo za EPDM kuti zigwirizane ndi madzi akumwa.

4. Kupanga Mphamvu:

   • Ma waya a nthunzi, makina ozizira, ndi njira yodutsa turbine.
   • Ma valve opondereza kwambiri a madzi ophikira boiler.

5. Machitidwe a HVAC:

   • Madzi ozizira, mipiringidzo yotenthetsera, ndi makina owongolera firiji.

6. Makampani Ogulitsa Zam'madzi:

   • Kuziziritsa madzi a m'nyanja, makina oyendetsera magetsi, ndi kusamutsa mafuta.

Kodi ma valve a mpira opangidwa ndi flanged angagwiritsidwe ntchito chiyani?

Ma valve a mpira okhala ndi flanged amagwira ntchito yofunika kwambiri pakuwongolera madzi:

• Kudzipatula:Tsekani kayendedwe ka madzi panthawi yokonza kapena pa nthawi yadzidzidzi.
• Malamulo Oyendetsera Kayendedwe ka Madzi:Mapangidwe a V-port amathandiza kuti throttling igwire ntchito.
• Kuwongolera Kupanikizika:Pitirizani kukwera kwa mphamvu yamagetsi.
• Kuphatikiza kwa Machitidwe Ambiri:Lumikizani mapampu, matanki, ndi mapaipi kudzera mu ma flange.

Kutha kwawo kuthana ndi mavuto aakulu (monga kutentha kwa cryogenic, slurry) kumawapangitsa kukhala ofunika kwambiri m'mafakitale omwe amafuna kudalirika komanso chitetezo.

Mapeto

Ma valve a mpira opindikaNdi zinthu zosinthasintha, zolimba, komanso zothandiza kwambiri pamakina owongolera madzi. Ndi zosankha zomwe zimakhala ndi kukula kuyambira ½” mpaka 48″, zipangizo monga chitsulo chosapanga dzimbiri ndi PTFE, komanso kupanikizika mpaka 5,000 PSI, zimakwaniritsa zofunikira za mafakitale kuyambira mafuta ndi gasi mpaka kukonza madzi. Kapangidwe kake kokhala ndi flange kamatsimikizira kukhazikitsidwa kotetezeka, pomwe makonzedwe apamwamba (monga, okhazikika pa trunnion, atatu) amakulitsa magwiridwe antchito awo. Kaya ndi mapaipi olekanitsa, owongolera kuyenda, kapena oyang'anira nthunzi yamphamvu, mavalavu a mpira opangidwa ndi flange amapereka magwiridwe antchito osayerekezeka pa ntchito zofunika kwambiri.