1. Txhawm rau tiv thaiv qhov 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 feem ntau haum rau cov xov xwm huv si thiab tsis haum 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 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 hais tias nws yog ntsia rau ntawm ib tug ntsug raj, qhov nruab nrab ntws kev taw qhia yuav tsum yog los ntawm hauv qab mus rau sab saum toj;
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 chaw ua haujlwm thiab txhua qhov chaw 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 kos valve tsis txwv thiab tuaj yeem ntsia tau rau ntawm cov kav dej kab rov tav, lossis ntawm cov kav dej ntsug lossis inclined;
