1. Cov dej tsis kam yog me me. Lub pob valve muaj cov kua dej tsawg tshaj plaws ntawm tag nrho cov li qub. Txawm tias qhov txo qis pob valve muaj cov kua dej me me.
2. Qhov hloov ntawm lub pob valve yog ceev thiab yooj yim. Ntev npaum li lub valve qia tig 90 °, lub pob valve yuav ua tiav qhov qhib tag nrho lossis kaw tag nrho, uas ua rau nws yooj yim qhib thiab kaw sai.
3. Lub pob valve muaj kev sib khi zoo. Pob valve lub rooj ntsaws ruaj ruaj feem ntau yog ua los ntawm cov ntaub ntawv elastic xws li polytetrafluoroethylene, uas yog ib qho yooj yim los xyuas kom meej lub foob, thiab lub sealing quab yuam ntawm lub pob valve nce nrog qhov nce ntawm nruab nrab siab.
4. Lub valve qia ntawm lub pob valve yog kaw ruaj khov. Lub valve qia tsuas yog tig thaum lub pob valve qhib thiab kaw, yog li cov ntim ntim ntawm lub valve qia tsis yooj yim rau kev puas tsuaj, thiab lub sealing quab yuam ntawm inverted foob ntawm lub valve qia nce nrog qhov nce ntawm nruab nrab siab.
5. Qhov qhib thiab kaw ntawm lub pob valve tsuas tuaj yeem tig los ntawm 90 °, yog li nws yooj yim kom paub txog kev tswj tsis siv neeg thiab kev tswj chaw taws teeb. Lub pob valve tuaj yeem nruab nrog cov cuab yeej pneumatic, cov khoom siv hluav taws xob, cov khoom siv hydraulic, cov khoom siv roj-kua sib txuas lossis cov khoom siv hluav taws xob-hydraulic txuas.
