1. Cov kua dej tsis kam yog me me, thiab lub pob tag nrho lub pob valve yeej tsis muaj dej tsis kam;
2. Cov qauv yooj yim, me me thiab lub teeb yuag;
3. Kaw thiab txhim khu kev qha. Nws muaj ob qhov chaw sib khi, thiab ntau yam yas tau siv dav los ua cov khoom ntim ntawm lub pob valve, uas muaj kev sib khi zoo thiab tuaj yeem ua tiav sealing tiav. Nws kuj tau siv dav hauv lub tshuab nqus tsev;
4. Kev ua haujlwm yooj yim, qhib thiab kaw nrawm, tsuas yog yuav tsum tig 90 degree los ntawm kev qhib siab kom kaw tag nrho, uas yooj yim rau kev tswj chaw taws teeb;
5. Kev saib xyuas yooj yim, cov qauv yooj yim ntawm lub pob valve, lub nplhaib sealing feem ntau txav tau, nws yooj yim rau disassemble thiab hloov;
6. Thaum qhib tag nrho lossis kaw tag nrho, lub sealing nto ntawm lub pob thiab lub rooj zaum valve raug cais tawm ntawm qhov nruab nrab, thiab qhov nruab nrab yuav tsis ua kom yaig ntawm lub valve sealing nto thaum nruab nrab hla;
