Thaum ib tug bi-directional valve yog yuav tsum tau rau kev tswj cov dej ntws mus tom ntej thiab tiv thaiv kom tsis txhob rov qab los, NSEN hlau zaum bi-directional npauj npaim valve yog koj xaiv. Lub sealing adopts tag nrho hlau rau hlau qauv, cov series no feem ntau yog siv rau hauv Fais fab Plan, Central Cua Sov, Roj & Gas kev lag luam. Txais tos hu rau peb kom tau txais cov catalog lossis customize valve rau koj qhov project.