1. Yintoni iValufa yeSango?
Ivalve yesango sisivalo esisetyenziselwa UKUVULA NOKUVALA ukuhamba kolwelo kumbhobho.Ivula okanye ivale ivalve ngokuphakamisa isango ukuvumela okanye ukunqanda ukuhamba kolwelo.Kufuneka kugxininiswe ukuba i-valve yesango ayinakusetyenziselwa ukulawulwa kokuhamba, kodwa ifanelekile kuphela kwizicelo ezifuna ukuhamba ngokupheleleyo okanye ukuvalwa ngokupheleleyo.
Umgangatho weVave yeSango: GB/DIN/API/ASME/GOST.
umgangatho we-GB:
| Yila | Ubuso ngobuso | Flange | Uvavanyo |
| GB/T12234 | GB/T12221 | JB/T79 | JB/T9092 |
DIN umgangatho:
| Yila | Ubuso ngobuso | Flange | Uvavanyo |
| I-DIN3352 | DIN3202 F4/F5 | EN1092 | EN1266.1 |
umgangatho we-API:
| Yila | Ubuso ngobuso | Flange | Uvavanyo |
| API 600 | ASME B16.10 | I-ASME B16.5 | API 598 |
Umgangatho weGOST:
| Yila | Ubuso ngobuso | Flange | Uvavanyo |
| I-GOST 5763-02 | I-GOST 3706-93. | GOST 33259-2015 | I-GOST 33257-15 |
2.ISakhiwo seValve yeSango
Iivalvu zesango zihlala zibandakanya amacandelo amaninzi abalulekileyo:
1) Umzimba weValve: Eyona nxalenye ibalulekileyo yevalve yesango.Izinto eziphathekayo ngokuqhelekileyo zenziwe nge-ductile iron, WCB, SS, njl.
I-2) Isango: iyunithi yokulawula, enokuthi ibe yiplati enerabha okanye iplate yentsimbi ecocekileyo.
3) Isiqu seValve: esetyenziselwa ukuphakamisa isango, elenziwe nge-F6A (i-forged ss 420), i-Inconel600.
4) Ibhonethi: iqokobhe elikumphezulu womzimba wevalvu, othi kunye nomzimba wevalvu yenze iqokobhe levalvu yesango elipheleleyo.
5) Isitulo sevalvu: indawo yokutywina apho ipleyiti yesango idibana nomzimba wevalvu.
3. Ziziphi iintlobo ezahlukeneyo zeeVave zeSango?
Ngokohlobo lwesakhiwo sevalve yesikhondo, inokohlulwa ibe ivelufa yesango yesiqu enganyukiyo kunye nevalve yesango enyukayo.
1)Ivalve yesango yesiqu enganyukiyo:Umphezulu wesikhondo sevalve yevalve yesango efihliweyo awandi ngevili lesandla.Ipleyiti yesango iya phezulu okanye ezantsi ecaleni kwesikhondo sevalve ukuvula okanye ukuvala ivalve yesango.Kuphela yipleyiti yevalve yevalve yesango iyonke enentshukumo yokususwa.
2)Ivalve yesango lesiqu esinyukayo (ivalve yesango ye-OS&Y):Umphezulu wesiqu esinyukayo sevalve yesango utyhilekile ngaphezulu kwevili lesandla.Xa ivalve yesango ivuliwe okanye ivaliwe, isiqu sevalve kunye nepleyiti yesango ziyaphakanyiswa okanye zithotywe kunye.
4. Isebenza Njani Ivalufa yeSango?
Ukusebenza kwevalve yesango kulula kwaye kubandakanya la manyathelo alandelayo:
1) Imeko evulekileyo: Xa i-valve yesango ikwimeko evulekileyo, iplate yesango iphakanyiswe ngokupheleleyo kwaye ulwelo lunokuhamba kakuhle kumjelo womzimba wevalve.
2) Imeko evaliweyo: Xa ivalve idinga ukuvalwa, isango lihanjiswa phantsi.Icinezelwe ngokuchasene nesihlalo sevalve kwaye idibane nomphezulu wokutywina womzimba wevalvu, ukuthintela ukudlula kolwelo.
5. Ingaba iGalufa yeSango isetyenziselwa ntoni?
Iivalve zesango zinoluhlu olubanzi lwezicelo kwaye zinokusetyenziswa kumashishini ahlukeneyo kunye nokusingqongileyo, okunje:
1) Unyango lwamanzi: Iivalvu zesango ezithambileyo zisetyenziswa kakhulu kunyango lwamanzi kunye namanzi amdaka.
I-2) Ishishini le-oyile kunye negesi yendalo: Iivalvu zesango eziqinileyo zisetyenziswa kwishishini leoli kunye negesi yendalo.
3) Ukucutshungulwa kweekhemikhali: Iivalve zesango zensimbi ezingenasici zifanelekile ukulawula ukuhamba kweekhemikhali kunye nolwelo olonakalisayo kwimichiza.
I-4) Iinkqubo ze-HVAC: Iivalve zesango zisetyenziselwa ukufudumeza, ukungena komoya kunye ne-air conditioning (HVAC) iinkqubo.
Ke, ngaba iiValuvu zeSango zingasetyenziselwa ukuphosa?
Njengoko kunokubonwa apha ngasentla, impendulo nguHAYI!Injongo yokuqala yevalve yesango kufuneka ivuleke ngokupheleleyo kwaye ivalwe ngokupheleleyo.Ukuba isetyenziswe ngenkani ukulungelelanisa ukuhamba, ukuhamba okungachanekanga, ukuphazamiseka kunye nezinye iziganeko ziya kwenzeka, kwaye kuya kubangela lula i-cavitation kunye nokugqoka.
6. Izinto eziluncedo zeGalufa yeSango
I-1) Ukuhamba okugcweleyo: Xa uvulekile ngokupheleleyo, isango linqanaba kunye nomphezulu wombhobho, ukubonelela ngokungahambi kakuhle kunye nokunciphisa uxinzelelo oluncinci.
2)0 Ukuvuza: Xa ipleyiti yesango idibana nesitulo sevalvu, itywina eliqinileyo lenziwa ukuthintela ulwelo ukuba lungavuzi ngevalvu.Umphezulu wokutywina wesango kunye nesitulo sevalvu zihlala zenziwe ngezinto ezinjengentsimbi okanye ielastiki elastomer ukufezekisa ukutywinwa kwamanzi kunye nokutywinwa komoya ngokuvuza kwe-zero.
I-3) Ukutywinwa kwe-Bidirectional: Iivalve zesango zingabonelela ngokutywinwa kwe-bidirectional, ezenza zibe ziguquguqukayo kwimibhobho ehamba ngokubuyela umva.
4) Ukugcinwa okulula: Akukho mfuneko yokuqhaqha i-valve yesango ngokupheleleyo.Kufuneka uvule kuphela isigqubuthelo sevalve ukuveza ngokupheleleyo ubume bangaphakathi bokugcinwa.
7. Izinto ezingeloncedo kwiiVavu zeSango
1)Xa kuthelekiswa nezinye iivalve ezinemilo elula (ezifana neevalve zebhabhathane), umzimba wevalve usebenzisa izinto ezininzi kwaye ixabiso liphezulu.
2) Ubuninzi be-valve yesango kufuneka bube buncinci, ngokubanzi DN≤1600.Ivalve yebhabhathane inokufikelela kwi-DN3000.
3)Ivalve yesango ithatha ixesha elide ukuvula nokuvala.Ukuba kufuneka ivulwe ngokukhawuleza, inokusetyenziswa nge-actuator ye-pneumatic.