Saib xyuas cov roj yog feem ntau muab faib ua peb hom hauv qab no raws li lawv cov qauv:
- Nyom Kos Valve
Lub valve discides nce thiab nqis raws cov kab ntsug nruab nrab ntawm lub cev valve. Cov kua dej nraim thawb lub pob valve thawb lub valve disc qhib, thiab nws kaw los ntawm nws tus kheej lub cev lossis lub caij nplooj ntoos hlav hauv kev thim rov qab. Nws muaj kev sib khi tau zoo thiab haum rau kev ntsuas siab me me (DN tsawg dua lossis sib npaug nrog 200 hli), tab sis nws yuav tsum tau teeb tsa ntawm kab rov tav xipelines.
Lub valve disc yog disc-puab thiab rotates ib ncig ntawm sab nraud pin ncej ntawm lub rooj valve. Nws qhib thaum ntws tawm hauv kev taw qhia tom ntej thiab kaw los ntawm cov kua kub thiab qhov hnyav hauv kev thim rov qab. Nws muaj qhov chaw sawv tsis tshua muaj thiab haum rau cov kav dej loj (dn ntau dua lossis sib npaug nrog 50 hli). Nws tuaj yeem muab cov kab ntawv tav toj, ntsug lossis qaij (qhov nruab nrab xav tau nruab rau hauv qab mus rau saum toj thaum ntsia kab ntawv).
Subcategories: single-disc type (medium diameter), double-disc type (DN≤600mm), multi-disc type (DN>600mm, txhawm rau txo cov dej rauj).
- Npauj Npaim Kos Valve
Lub valve disc yog disc-puab thiab tig ib ncig ntawm lub Center axis (zoo ib yam li npauj npaim valve). Nws muaj cov qauv kev cog lus thiab lub teeb yuag, thiab haum rau cov ntawv loj-caliber thiab cov khoom lag luam qis qis (xws li kev sib tw ua haujlwm tsis muaj zog.
