NSEN muaj ob qho tib si bi-directional thiab uni-directional qauv rau cov neeg siv khoom, nrog kev sib txuas Wafer hom, Ob chav flange hom, Lug hom thiab Butt Weld hom. Yuav kom yooj yim rau koj xaiv valve, kev pabcuam haujlwm yuav muab tom qab koj xa peb cov ntsiab lus ua haujlwm. Yuav kom paub txog peb cov kev pabcuam siab dawb siab zoo, xa koj cov lus nug tam sim no!