Txheeb xyuas qhov kev xaiv Valve

1. Txhawm rau tiv thaiv kev thim rov qab ntawm qhov nruab nrab, cov tshev valve yuav tsum tau nruab rau ntawm cov khoom siv, cov khoom siv thiab cov kav dej;
2. Kos li qub yog feem ntau haum rau cov xov xwm huv si, thiab yuav tsum tsis txhob siv rau cov xov xwm uas muaj cov khoom siv thiab cov viscosity siab;
3. Feem ntau, kab rov tav nqa daim tshev li qub yuav tsum tau siv rau ntawm cov kav dej kab rov tav nrog lub nominal txoj kab uas hla ntawm 50mm;
4. Qhov ncaj-dhau ntawm nqa daim tshev valve tuaj yeem ntsia tau rau ntawm cov kav dej kab rov tav xwb;
5. Rau cov dej twj tso kua mis inlet pipeline, yuav tsum tau siv lub valve hauv qab. Lub hauv qab valve feem ntau tsuas yog ntsia rau ntawm cov yeeb nkab ntsug ntawm lub twj tso kua mis inlet, thiab qhov nruab nrab ntws los ntawm hauv qab mus rau saum;
6. Hom lifting muaj kev sib khi zoo dua thiab ua kom muaj dej ntau dua li lub viav vias hom. Hom kab rov tav yuav tsum tau muab ntsia rau ntawm cov kav dej kab rov tav, thiab hom ntsug yuav tsum tau muab ntsia rau ntawm cov kav dej ntsug;
7. Lub installation txoj hauj lwm ntawm lub viav vias kos valve tsis txwv. Nws tuaj yeem ntsia tau rau ntawm kab rov tav, ntsug lossis inclined pipelines. Yog tias ntsia rau ntawm txoj kab ntsug, qhov nruab nrab ntws kev taw qhia yuav tsum yog los ntawm hauv qab mus rau saum;
8. Lub viav vias kos valve yuav tsum tsis txhob ua rau hauv lub valve me me. Nws tuaj yeem ua rau kev ua haujlwm siab heev. Lub nominal siab tuaj yeem ncav cuag 42MPa, thiab lub nominal txoj kab uas hla tuaj yeem loj heev, mus txog 2000mm lossis ntau dua. Nyob ntawm cov ntaub ntawv ntawm lub plhaub thiab cov ntsaws ruaj ruaj, nws tuaj yeem siv rau txhua qhov kev ua haujlwm nruab nrab thiab kev ua haujlwm kub. Qhov nruab nrab yog dej, chav, roj, nruab nrab corrosive, roj, tshuaj, thiab lwm yam. Qhov kub thiab txias ntawm qhov nruab nrab yog nyob nruab nrab ntawm -196--800 degree;
9. Lub viav vias kos valve yog tsim rau qhov tsis tshua muaj siab thiab txoj kab uas hla loj, thiab qhov chaw teeb tsa raug txwv;
10. Lub installation txoj hauj lwm ntawm npauj npaim check valve tsis txwv thiab yuav muab ntsia tau rau kab rov tav pipelines, ntsug los yog inclined pipelines;
11. Lub diaphragm kos valve yog tsim rau cov kav dej uas muaj dej rauj. Lub diaphragm tuaj yeem tshem tawm cov dej rauj ua tau zoo thaum qhov nruab nrab ntws rov qab. Nws feem ntau yog siv rau cov kav dej uas tsis tshua muaj siab thiab kub ib txwm, tshwj xeeb tshaj yog tsim rau cov kav dej kais dej thiab kev ua haujlwm nruab nrab. Qhov kub thiab txias yog nyob nruab nrab ntawm -12--120 degree, thiab kev ua haujlwm siab yog<1.6MPa, but the diaphragm check valve can have a larger diameter, and the maximum DN can reach more than 2000mm;
12. Pob kos valve yog tsim rau nruab nrab thiab tsis tshua muaj siab pipelines thiab tuaj yeem ua rau hauv txoj kab uas hla loj;
13. Cov khoom siv lub plhaub ntawm lub pob kos valve tuaj yeem ua los ntawm cov hlau tsis muaj steel, thiab lub hollow sphere ntawm lub foob tuaj yeem qhwv nrog polytetrafluoroethylene engineering yas, yog li nws kuj tuaj yeem siv rau hauv cov kav dej nrog cov xov xwm corrosive. Qhov kub ua hauj lwm yog -101--150 degree, lub nominal siab yog tsawg dua los yog sib npaug rau 4.
14. Thaum xaiv lub pob valve rau cov kua dej tsis txaus, koj yuav tsum xub ntsuas qhov xav tau kaw qhov ceev. Cov kauj ruam thib ob yog xaiv hom kev kos valve uas yuav ua tau raws li qhov yuav tsum tau kaw ceev;
15. Thaum xaiv cov tshev valve rau cov kua compressible, koj tuaj yeem xaiv lawv zoo ib yam los xyuas cov kua dej tsis txaus. Yog hais tias qhov nruab nrab ntws ntau yog loj, kos li qub rau compressible kua yuav siv tau. Ib qho khoom siv txo qis. Yog tias qhov nruab nrab ntws nres thiab pib nrawm nrawm, xws li ntawm qhov hluav taws xob ntawm lub tshuab hluav taws xob, siv lub tshuab nqa nqa;
16. Lub check valve yuav tsum loj npaum li cas, thiab tus neeg muag khoom valve yuav tsum muab cov ntaub ntawv ntawm qhov kev xaiv loj kom lub valve loj thaum lub valve qhib tag nrho ntawm tus nqi txaus tuaj yeem pom;
17. Rau siab thiab nruab nrab siab check li qub hauv qab DN50mm, ntsug nqa check li qub thiab ncaj-los ntawm nqa check li qub yuav tsum tau siv;
18. Rau qhov ntsuas qis qis hauv qab DN50mm, npauj npaim kos li qub, ntsug nqa daim tshev li qub thiab diaphragm kos li qub yuav tsum tau siv;
19. Rau siab thiab nruab nrab siab check li qub nrog DN ntau dua 50mm thiab tsawg dua 600mm, viav vias kos li qub yuav tsum tau siv;
20. Rau nruab nrab thiab tsis tshua muaj siab check li qub nrog DN ntau dua 200mm thiab tsawg dua 1200mm, nws yog advisable xaiv ib tug hnav-dawb kheej kheej check valve;
21. Rau qhov ntsuas qis qis nrog DN ntau dua 50mm thiab tsawg dua 2000mm, npauj npaim check li qub thiab diaphragm kos li qub yuav tsum tau xaiv;
22. Rau cov kav dej uas yuav tsum tau me ntsis dej rauj los yog tsis muaj dej rauj thaum kaw, yuav tsum tau xaiv lub viav vias qeeb qeeb thiab kaw npauj npaim kaw li qub.