Uhlalutyo lweeNzuzo kunye nokungalungi kweentlobo ezintlanu eziqhelekileyo zeevalvu 2

3. Ivalvu yeBhola

Ivalvu yebhola yavela kwivalvu yeplagi. Inxalenye yayo yokuvula nokuvala yisphere, kwaye isphere ijikeleza i-90° ijikeleze i-axis yesiqu sevalvu ukuze kufezekiswe injongo yokuvula nokuvala. Ivalvu yebhola isetyenziswa kakhulu kwimibhobho ukusika, ukusasaza, nokutshintsha indlela yokuhamba kwesixhobo. Ivalvu yebhola eyilwe ngokuvulwa okufana no-V ikwanomsebenzi olungileyo wokulawula ukuhamba.

Ifektri yevalvu yeTWS ibonelela ngevalvu yebhabhathane ehlala iqinile, i-YD37A1X3-16Q, ivalvu yebhabhathane ejikelezileyo ephindwe kabini.D34B1X3-16Q, Ivalvu yebhabhathane engaqhelekanga ephindwe kabini ngokweSer.13 okanye uthotho 14, ivalvu yesango ehleliyo yerabha yeBS5163/F4/F5 /ANSI CL150, i-Y-strainer, ivalvu yokulinganisela, i-back flow preventer.

3.1 Iingenelo:

① Inokumelana okuphantsi kokuhamba kwamanzi (phantse kube yi-0).

② Ekubeni ingasayi kubamba ngexesha lokusebenza (xa kungekho lubricant), ingafakwa ngokuthembekileyo kwi-media ebolayo kunye nolwelo olusezantsi.

③ Ingafikelela ekuvalekeni ngokupheleleyo ngaphakathi koluhlu loxinzelelo olukhulu kunye nobushushu.

④ Ingafikelela ekuvulekeni nasekuvaleni ngokukhawuleza. Ixesha lokuvula nokuvala kwezinye izakhiwo liyimizuzwana eyi-0.05 ukuya kweyi-0.1 kuphela, okuqinisekisa ukuba ingasetyenziswa kwiinkqubo ezizenzekelayo zeebhentshi zovavanyo. Xa uvula kwaye uvala ivalvu ngokukhawuleza, akukho mpembelelo ikhoyo ngexesha lokusebenza.

⑤ Inxalenye yokuvala eyingqukuva ingazibeka ngokuzenzekelayo kwindawo yomda.

⑥-- Indawo yokusebenza ivalwe ngokuthembekileyo kwivalvu.

Q⑦ Xa ivalvu ivuliwe ngokupheleleyo kwaye ivaliwe ngokupheleleyo, iindawo zokutywina zesphere kunye nesihlalo sevalvu ziyahlukaniswa kwi-medium. Ke ngoko, i-medium ehamba ngevalvu ngesantya esiphezulu ayizukubangela ukukhukuliseka kweendawo zokutywina.

⑧ Inesakhiwo esincinci kwaye inobunzima obuphantsi. Ingathathwa njengesakhiwo sevalvu esifanelekileyo kwiinkqubo eziphakathi ezinobushushu obuphantsi.

⑨ IivalvuUmzimba ulingana. Ingakumbi kwisakhiwo somzimba sevalvu edibeneyo, inokumelana kakuhle noxinzelelo oluvela kumbhobho.

⑩ Inxalenye yokuvala inokumelana nomahluko ophezulu woxinzelelo ngexesha lokuvala.

⑪ Ivalvu yebhola enomzimba wevalvu edityanisiweyo ngokupheleleyo ingangcwatywa ngqo phantsi komhlaba, ikhusele iindawo zangaphakathi zevalvu ekuboleni. Ubomi bayo obuphezulu benkonzo bunokufikelela kwiminyaka engama-30, nto leyo eyenza ukuba ibe yeyona valve ifanelekileyo kwimibhobho yeoyile negesi yendalo.

3.2 Izinto ezingalunganga:

① Eyona nto iphambiliivalvuIzinto ezisetyenziswa kwiringi yokutywina isihlalo sevalvu yebhola yi-polytetrafluoroethylene (PTFE). Ayisebenzi phantse kuzo zonke izinto zeekhemikhali kwaye ineempawu ezibanzi ezifana ne-coefficient encinci yokungqubana, ukusebenza okuzinzileyo, ukumelana nokwaluphala, uluhlu olubanzi lobushushu olusebenzayo, kunye nokusebenza kakuhle kokutywina. Nangona kunjalo, iipropati zomzimba ze-PTFE, kubandakanya i-coefficient ephezulu yokwandiswa, uvakalelo lokuhamba komoya obandayo, kunye nokuqhuba kakubi kobushushu, zifuna ukuba uyilo lwe-valve seat seal kufuneka lwenziwe malunga nezi mpawu. Ke ngoko, xa izinto zokutywina ziqina, ukuthembeka kwe-seal kuyaphazamiseka. Ngaphezu koko, umgangatho wokumelana nobushushu be-PTFE uphantsi, kwaye ungasetyenziswa kuphela kumaqondo obushushu angaphantsi kwe-180°C. Xa ubushushu budlula eli xabiso, izinto zokutywina ziya kuguga. Xa ucinga ngokusetyenziswa ixesha elide, ngokubanzi isetyenziswa kuphela kwi-120°C.

② Ukusebenza kwayo ngendlela eyiyo kumbi kancinci kune-globe valve, ingakumbi kwiivalvu zomoya (okanye iivalvu zombane).

5. Ivalvu yePlagi

Ivalvu yeplagi ibhekisa kwivalvu ejikelezayo apho inxalenye yokuvala ikwimo yeplunger. Ngokujikeleza i-90°, ukuvulwa kwendlela kwiplagi kwenziwa ukuze kudibane okanye kwahlulwe kwindawo yokuvulwa kwendlela emzimbeni wevalvu, oku kwenza ukuba kuvuleke okanye kuvalwe ivalvu. Ikwabizwa ngokuba yi-cock, stopcock, okanye i-rotary gate. Imilo yeplagi ingaba yi-cylindrical okanye i-conical. Kukho iintlobo ezininzi zayo, kubandakanya uhlobo oluthe tye, uhlobo oluneendlela ezintathu, kunye nohlobo oluneendlela ezine. Umgaqo wayo ufana kakhulu nowevalvu yebhola.

5.1 Iingenelo:

① Ifanelekile ukusetyenziswa rhoqo, ivuleka kwaye ivale ngokukhawuleza nangokulula.

② Ukumelana nolwelo kuncinci.

③ Inesakhiwo esilula, inomthamo omncinci, inobunzima obuphantsi, kwaye kulula ukuyigcina ikwimeko entle.

④ Isebenza kakuhle ekutywineni.

⑤ Ayithintelwanga yindlela yokufakela, indlela yokuhamba kwesixhobo inokuba yinto engacwangciswanga.

⑥ Akukho kungcangcazela, kwaye ingxolo iphantsi.

5.2 Izinto ezingalunganga:

⑦ Umphezulu wokutywina mkhulu kakhulu, nto leyo ebangela ukuba i-torque ibe ninzi kakhulu kwaye ingaguquguquki ngokwaneleyo.

⑧ Ubungakanani be-valve diameter bulinganiselwe ngenxa yobunzima bayo.

Xa isetyenziswa ngokwenene, ukuba kufuneka ivalvu enkulu, kufuneka kusetyenziswe isakhiwo seplagi ebuyela umva, nto leyo enokuchaphazela isiphumo sokutywina.

Iinkcukacha ezingaphezulu, ungaqhagamshelana nathi simahlaivalvu ye-TWSumzi-mveliso.