Valve yoyendera imalepheretsa kubweza komwe kungawononge kuti ateteze zida monga mapampu ndi ma compressor. Ma valve osabwerera amalola kutuluka kwamadzimadzi kumalo amodzi okha ndi kutsekereza kutuluka kwa reverse. Mavavu amtunduwu amapezeka ndi matupi opangidwa ndi opangidwa (BS 1868, API 6D, API 602) komanso m'mapangidwe angapo monga ma swing, mpira, kukweza, kuyimitsa ndi pisitoni.
Mwachidule, valavu yoyang'anira ndi chipangizo choteteza chomwe chimalepheretsa madziwo kuyenda kupita njira yosafunikira mkati mwa mapaipi kapena mapaipi (monga kubweza kumbuyo kungawononge zida zakumtunda).
Kodi cheki valve imagwira ntchito bwanji?
Valavu imalola kuti madziwo aziyenda komwe akufunidwa (ngati pali kukakamiza kokwanira), ndikuletsa kuyenda kwina kulikonse. Komanso, valavu imatseka yokha pamene kuthamanga kutsika. Chifukwa chake ndikofunikira kuti valavu imayikidwa ndi malo oyenera!
Dziwani kuti valavu yamtunduwu imakwaniritsa kuchuluka kwake popanda mphamvu zakunja kapena kuyambitsa. Izi ndizosiyana kwambiri motsutsana ndi zipata kapena ma valve a globe, omwe amafunikira mphamvu yakunja kuti agwire ntchito (mulingo, gudumu, giya kapena actuator).
Zofunikira zazikulu zomwe zimaphimba mtundu uwu wa valve ndi:
BS 1868: Mtundu wokhazikika, mu carbon ndi alloy steel
API 6D: ya mapaipi.
API 602 / BS 5351: chitsulo chonyezimira (kugwedezeka, mpira, pistoni).
API 603: mtundu woyimitsa chitsulo chosapanga dzimbiri.
ASME B16.34 (kupanikizika ndi kutentha).
ASME B16.5/ASME B16.47 (malumikizidwe okhala ndi flanged).
ASME B16.25 (malumikizidwe a butt weld).
Ma valve otayira zitsulo amapezeka ndi ma flanged ndi matako weld.
Zopangira, zazing'ono, ma valve amapezeka ndi maulalo a ulusi ndi socket weld.
Ma valve awa akuimiridwa ndi chizindikiro chotsatira pazithunzi za P&ID: Chizindikiro cha valavu mu chithunzi cha P&ID
Ma valve owunika amapezeka amitundu yosiyanasiyana omwe amakwaniritsa zomwe tafotokozazi ndi mapangidwe osiyanasiyana (mpira, clapet, piston, etc.). Tiyeni tione bwinobwino mtundu uliwonse.
SWING CHECK VALVE
Mtundu uwu uli ndi mapangidwe osavuta kwambiri ndipo umagwira ntchito kudzera pazitsulo zachitsulo ("Clapet") zomwe zimamangiriridwa ku hinge pamwamba. Pamene madzi akudutsa mu valve yothamanga, valve imatsegulidwa. Pamene kuthamanga kwapakati kumachitika, kusintha kwa kayendetsedwe kake komanso mphamvu yokoka kumathandiza kutsitsa diski, kutseka valavu ndikuletsa kubwereranso.
Ma valve a swing amagwiritsidwa ntchito kuzimitsa moto komanso kupewa kusefukira kwamadzi m'zimbudzi. Amapangidwanso kuti azigwira ntchito ndi zida monga gasi, zakumwa, ndi mitundu ina ya media.
Kuyimitsa cheke kumatha kuyambitsa, kuyimitsa, ndikuwongolera kutuluka kwamadzi ndikupewa kubweza koopsa komwe kungawononge zida zina monga mapampu ndi ma compressor.
Pamene kupanikizika mu dongosolo kuli pansi pa mtengo wina, valavu iyi imatseka yokha kuti itseke maulendo obwerera. Kawirikawiri, valavu yamtunduwu imakhala ndi mphamvu yowonjezera kunja kuti itseke njira yamadzimadzi pamanja (mofanana ndi valve yachipata).
Ma valve oyimitsa ndi ofala kwambiri m'mafakitale opangira magetsi, makina opangira boiler, kuyenga mafuta & gasi, kukonza ma hydrocarbon, ndi ntchito zoteteza mwamphamvu kwambiri.
MPIRA CHECK VALVE
Valavu yowunikira mpira imakhala ndi mpira wozungulira womwe uli mkati mwa thupi lomwe limatsegula ndikutseka njira yamadzimadzi pongofuna kumene.
Mpira umazungulira momasuka madzimadzi akamadutsa paipi kupita komwe ukufunidwa. Ngati payipiyo ikucheperachepera kapena kuyenderera mobwerera, mpira mkati mwa valavu umasunthira kumpando, ndikusindikiza ndimeyo. Kapangidwe kameneka kamagwirizana ndi madzi a viscous.
Ma cheke ma valve onse ndi a banja la "ma valve okweza", ndipo mukhale ndi mapangidwe a mipando yofanana ndi ma valve a globe.
Kusiyanasiyana kwa mapangidwe a mpira ndizomwe zimatchedwa piston. Valavu yamtunduwu imagwiritsidwa ntchito pazantchito zothamanga kwambiri komwe madzimadzi amatha kusintha njira mwadzidzidzi komanso ndi mphamvu yabwino (izi chifukwa chakuti diskiyo imatsogozedwa bwino ndipo imalowa bwino pampando).
Mavavu a mpira ndi pistoni amatha kukhazikitsidwa molunjika komanso molunjika.
MBALE YAPAWIRI
Ma valve oyendera ma mbale awiri, ophimbidwa ndi API 594, amagwiritsidwa ntchito pafupipafupi kuteteza mapampu, ma compressor ndi zida zina zamakina.
PRESSURE SEAL
Mtundu uwu umakhala ndi chivundikiro chapadera chapangidwe chomwe chimatha kupirira zovuta zambiri.
Valovu yatsopano yowunika idzayikidwa nthawi iliyonse pampu yatsopano ya sump ikayikidwa. Izi chifukwa chakuti ma valve akale otetezera angakhale owonongeka ndi ntchito zam'mbuyomu zotseguka / zotsekedwa kapena zowonongeka komanso zoopsa zowononga pampu yatsopano ya sump kuposa mtengo wa valavu yatsopano!
Valavu ya sump pump imalepheretsa kubwereranso mu pampu ya sump pomwe chipangizocho chimazimitsidwa ndi woyendetsa kapena makina owongolera okha. Popanda valavu, madzimadzi amatha kubwerera mu sump pump ndikuukakamiza kusuntha madzi omwewo kangapo, ndikuwotcha nthawi yake isanakwane.
Choncho, kuti awonjezere moyo wa pampu ya sump, valve yosabwerera iyenera kuikidwa nthawi zonse.
Nthawi yotumiza: Oct-26-2019