Mfundo yosankha ya valavu ya padziko lonse
Valavu yotseka imatanthauza valavu yomwe gawo lake lotseka (diski) limasuntha pakati pa mpando wa valavu. Malinga ndi mawonekedwe osuntha a valavu disc, kusintha kwa doko la mpando wa valavu kumafanana ndi stroke ya valavu disc. Popeza stroke yotsegulira kapena yotseka ya tsinde la valavu yamtunduwu ndi yayifupi, ndipo ili ndi ntchito yodalirika kwambiri yodulira, ndipo chifukwa kusintha kwa doko la mpando wa valavu kumafanana mwachindunji ndi stroke ya valavu disc, ndiyoyenera kwambiri kusintha kayendedwe ka madzi. Chifukwa chake, valavu yamtunduwu ndi yoyenera kwambiri kugwiritsidwa ntchito ngati shut-off kapena kusintha ndi throttling.
Valavu yotseka imatanthauza valavu yomwe gawo lake lotseka (diski) limasuntha pakati pa mpando wa valavu. Malinga ndi mawonekedwe osuntha a valavu disc, kusintha kwa doko la mpando wa valavu kumafanana ndi stroke ya valavu disc. Popeza stroke yotsegulira kapena yotseka ya tsinde la valavu yamtunduwu ndi yayifupi, ndipo ili ndi ntchito yodalirika kwambiri yodulira, ndipo chifukwa kusintha kwa doko la mpando wa valavu kumafanana mwachindunji ndi stroke ya valavu disc, ndiyoyenera kwambiri kusintha kayendedwe ka madzi. Chifukwa chake, valavu yamtunduwu ndi yoyenera kwambiri kugwiritsidwa ntchito ngati shut-off kapena kusintha ndi throttling.
Mfundo yosankha valavu ya globe ndi iyi:
1. Valavu yoyimitsa iyenera kugwiritsidwa ntchito pa payipi kapena chipangizo chapakati chotentha kwambiri komanso chopanikizika kwambiri. Monga malo opangira magetsi otentha, malo opangira magetsi a nyukiliya, mapaipi otentha kwambiri komanso opanikizika kwambiri a machitidwe a petrochemical.
2. Pa mapaipi omwe safuna kukana mwamphamvu kwa convection. Ndiko kuti, pamene kutayika kwa mphamvu sikuganiziridwa.
3. Pa mavavu ang'onoang'ono, mavavu a singano, mavavu a zida, mavavu oyesera zitsanzo, mavavu oyezera kuthamanga, ndi zina zotero zingagwiritsidwe ntchito.
4. Pali kusintha kwa kayendedwe ka madzi kapena kusintha kwa kuthamanga kwa madzi, koma kulondola kwa kusinthako sikokwera kwambiri, ndipo m'mimba mwake wa chitoliro ndi wochepa, monga chitoliro chokhala ndi njira yodziwika ya ≤50mm, chiyenera kusankhidwa.
5. Ma feteleza ang'onoang'ono ndi feteleza akuluakulu omwe amapangidwa m'mafakitale opanga ayenera kugwiritsa ntchito ma valve a globe angle pressure kapena ma valve a globe angle pressure okhala ndi nominal pressure ya PN160 ndi nominal pressure ya 16MPa kapena PN320 ndi nominal pressure ya 32MPa.
6. Mu malo ochitira opaleshoni yochotsa ma silicon mu njira ya alumina Bayer ndi mapaipi omwe amakonda kuphikidwa, n'kosavuta kusankha valavu yoyimitsa kayendedwe ka madzi mwachindunji kapena valavu yoyimitsa kayendedwe ka madzi mwachindunji ndi thupi la valavu lolekanitsidwa, mpando wa valavu ukhoza kuchotsedwa, ndi awiri otsekera a carbide opangidwa ndi simenti.
7. Pa ntchito zopezera madzi ndi kutentha m'mizinda, mapaipi ang'onoang'ono amadutsa mwapadera, ndipo ma valve oimika, ma valve olinganiza kapena ma valve opumira amatha kusankhidwa, monga mapaipi omwe amadutsa mwapadera osakwana 150mm.
Nortech ndi m'modzi mwa opanga ma valve otsogola ku China omwe ali ndi satifiketi ya ISO9001 yapamwamba.
Zinthu zazikulu:Valavu ya Gulugufe,Valavu ya Mpira,Valavu ya Chipata,Valavu Yowunikira,Globe Vavlve,Zipangizo za Y,Chotsukira Magetsi,Zipangizo zoyezera mpweya (Pneumatic Acurators).
Nthawi yotumizira: Sep-22-2021