Lub ntsiab yam tseem ceeb ntawm Valve xaiv muaj nuj nqi thiab kav kav dej
| Kev ua haujlwm thiab kev pabcuam |
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| Kev xaiv |
| Valves pab lub hom phiaj ntawm kev tswj cov fuids hauv tsev cov kev pab cuam piping.Nalves yog tsim nyob rau hauv avariety ntawm tsim hom thiab cov ntaub ntawv. |
| Kev xaiv kom raug yog ib qho tseem ceeb los xyuas kom meej qhov ua tau zoo tshaj plaws, raug nqi thiab siv tau ntev. |
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| Muaj nuj nqi |
| Valves yog tsim los ua plaub lub luag haujlwm tseem ceeb: |
| 1. Pib thiab nres qhov ntws |
| 2.Regulating (throttling) qhov ntws |
| 3. Tiv thaiv kev thim rov qab ntawm qhov ntws |
| 4.Regulating los yog relieving lub siab ntawm cov ntws |
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| Kev xav txog kev pabcuam |
| 1. Siab |
| 2. Kub |
| 3. Hom kua |
| a) Kua dej |
| b) Gas;ie, chav los yog cua |
| c) Dirty los yog abrasive (erosive) |
| d) Corrosive |
| 4. ntws |
| a) On-off throttling |
| b) Yuav tsum tiv thaiv kev ntws rov qab |
| c) Kev txhawj xeeb rau kev poob siab) ceev |
| 5. Cov xwm txheej ua haujlwm |
| a) Condensation |
| b) Ntau zaus ntawm kev ua haujlwm |
| c) Kev siv tau |
| d) Zuag qhia tag nrho sizelspace muaj |
| e) Manual los yog automated tswj |
| f) Xav tau npuas-nruj kaw-tawm |