1. Yintoni iValvu yeSango?
Ivalvu yesango yivalvu esetyenziselwa UKUVULA NOKUVALA ukuhamba kolwelo olukwipayipi. Ivula okanye ivale ivalvu ngokuphakamisa isango ukuvumela okanye ukuthintela ukuhamba kolwelo. Kufuneka kugxininiswe ukuba ivalvu yesango ayinakusetyenziswa ukulawula ukuhamba kolwelo, kodwa ifanelekile kuphela kwizicelo ezifuna ukuhamba ngokupheleleyo okanye ukuvalwa ngokupheleleyo.
Umgangatho weValve yeSango: GB/DIN/API/ASME/GOST.
Umgangatho we-GB:
| Uyilo | Ubuso ngobuso | Iflengi | Uvavanyo |
| GB/T12234 | GB/T12221 | JB/T79 | JB/T9092 |
Umgangatho we-DIN:
| Uyilo | Ubuso ngobuso | Iflengi | Uvavanyo |
| I-DIN3352 | I-DIN3202 F4/F5 | EN1092 | EN1266.1 |
Umgangatho we-API:
| Uyilo | Ubuso ngobuso | Iflengi | Uvavanyo |
| I-API 600 | I-ASME B16.10 | I-ASME B16.5 | I-API 598 |
Umgangatho we-GOST:
| Uyilo | Ubuso ngobuso | Iflengi | Uvavanyo |
| I-GOST 5763-02 | I-GOST 3706-93. | I-GOST 33259-2015 | I-GOST 33257-15 |
2. Ulwakhiwo lweValve yeSango
Iivalvu zesango zihlala ziqulathe izinto ezibalulekileyo:
1) Umzimba wevalvu: Eyona nto ibalulekileyo kwivalvu yesango. Izinto ezisetyenzisiweyo zenziwe ngentsimbi ethambileyo, iWCB, iSS, njl.
2) Isango: iyunithi yokulawula, enokuba yipleyiti egqunywe ngerabha okanye ipleyiti yesinyithi ecocekileyo.
3) Isiqu sevalvu: esisetyenziselwa ukuphakamisa isango, esenziwe nge-F6A (i-ss 420 eyenziwe nge-forged), i-Inconel600.
4) Ibhonethi: iqokobhe eliphezu komzimba wevalvu, elithe kunye nomzimba wevalvu lenza iqokobhe elipheleleyo levalvu yesango.
5) Isihlalo seValve: umphezulu wokutywina apho ipleyiti yesango idibana nomzimba wevalve.
3. Ziziphi iintlobo ezahlukeneyo zeeValve zeSango?
Ngokwendlela uhlobo lwesakhiwo sesiqu sevalvu, singahlulwa sibe yivalvu yesango lesiqu esinganyukiyo kunye nevalvu yesango lesiqu esinyukayo.
1)Ivalvu yesango lesiqu esinganyukiyo:Umphezulu wesiqu sevalvu yevalvu yesango lesiqu esifihliweyo awudluli ngevili lesandla. Ipleyiti yesango iya phezulu okanye ezantsi ecaleni kwesiqu sevalvu ukuze ivule okanye ivale ivalvu yesango. Yipleyiti yevalvu yevalvu yesango lonke kuphela enentshukumo yokufuduka.
2)Ivalvu yesango elinyukayo (ivalvu yesango le-OS&Y):Umphezulu wesiqu sevalvu yesango lesiqu esinyukayo uvezwa ngaphezulu kwevili lesandla. Xa ivalvu yesango ivuliwe okanye ivaliwe, isiqu sevalvu kunye nepleyiti yesango ziyaphakanyiswa okanye zehliswe kunye.
4. Isebenza njani iValvu yeSango?
Ukusebenza kwevalvu yesango kulula kakhulu kwaye kuquka la manyathelo alandelayo:
1) Imeko evulekileyo: Xa ivalvu yesango ikwimeko evulekileyo, ipleyiti yesango iphakanyisiwe ngokupheleleyo kwaye ulwelo lunokugeleza kakuhle ngomjelo womzimba wevalvu.
2) Imeko yokuvalwa: Xa ivalvu kufuneka ivalwe, isango liyashukunyiswa liye ezantsi. Licinezelwa kwisihlalo sevalvu kwaye lidibana nomphezulu wokuvala womzimba wevalvu, nto leyo ethintela ulwelo ukuba lungadluli.
5. Isetyenziselwa ntoni iValve yeSango?
Iivalvu zesango zineendlela ezahlukeneyo zokusetyenziswa kwaye zingasetyenziswa kumashishini ahlukeneyo nakwiindawo ezinje:
1) Unyango lwamanzi: Iivalvu zesango leseyile ezithambileyo zisetyenziswa kakhulu kunyango lwamanzi kunye namanzi amdaka.
2) Ishishini leoyile negesi yendalo: Iivalvu zesango eliqinileyo zisetyenziswa kwishishini leoyile negesi yendalo.
3) Ukucubungula iikhemikhali: Iivalvu zesango zentsimbi engatyiwayo zifanelekile ukulawula ukuhamba kweekhemikhali kunye nolwelo olubolayo ekucutshungulweni kweekhemikhali.
4) Iinkqubo ze-HVAC: Iivalvu zesango zisetyenziswa kwiinkqubo zokufudumeza, zokungenisa umoya kunye nezokupholisa umoya (HVAC).
Ngoko ke, ngaba iiValve zeSango zingasetyenziselwa ukuTrottling?
Njengoko kunokubonwa koku kungasentla, impendulo ithi HAYI! Injongo yokuqala yevalvu yesango kukuvulwa ngokupheleleyo nokuvalwa ngokupheleleyo. Ukuba isetyenziswa ngenkani ukulungisa ukuhamba kwamanzi, ukuhamba kwamanzi okungachanekanga, ukuxinana kwamanzi nezinye izinto kuya kwenzeka, kwaye kuya kubangela ukuguguleka nokubola kwesisu ngokulula.
6. Iingenelo zeValve yeSango
1) Ukuhamba komoya ngokupheleleyo: Xa ivuliwe ngokupheleleyo, isango lilingana nomphezulu wombhobho, nto leyo enika ukuhamba komoya okungaphazanyiswayo kunye nokwehla koxinzelelo oluncinci.
2)0 Ukuvuza: Xa ipleyiti yesango idibana nesihlalo sevalvu, kwakheka isitywino esiqinileyo ukuthintela ulwelo ukuba lungaphumi ngevalvu. Imiphezulu yokutywina yesihlalo sesango kunye nevalvu idla ngokwenziwa ngezinto ezifana nesinyithi okanye i-elastomer elastiki ukufezekisa ukuvalwa kwamanzi kunye nokutywinwa komoya ngaphandle kokuvuza.
3) Ukuvalwa kweendlela ezimbini: Iivalvu zesango zinokubonelela ngokuvalwa kweendlela ezimbini, nto leyo ezenza zibe lula kwiipayipi ezinokuhamba okuguquguqukayo.
4) Ukulungiswa okulula: Akukho mfuneko yokuqhaqha ivalvu yesango ngokupheleleyo. Udinga ukuvula isigqubuthelo sevalvu kuphela ukuze ubonise ngokupheleleyo isakhiwo sangaphakathi ukuze sigcinwe.
7. Iingxaki zeeValve zeSango
1) Xa kuthelekiswa nezinye iivalvu ezineemilo ezilula (ezifana neevalvu zebhabhathane), umzimba wevalvu usebenzisa izinto ezininzi kwaye ixabiso liphezulu.
2) Ububanzi obukhulu bevalvu yesango kufuneka bube buncinci, ngokubanzi i-DN≤1600. Ivalvu yebhabhathane inokufikelela kwi-DN3000.
3) Ivalvu yesango ithatha ixesha elide ukuyivula nokuyivala. Ukuba kufuneka ivulwe ngokukhawuleza, ingasetyenziswa ne-pneumatic actuator.