nitrogen purifier 1. used for purify hydrogen, nitrogen, air generator 2. output gas more purity. 3. three levels purifiers ... , want to rise purity, TF-2 purifier is your best choice! TF-2 gas purifier mainly used in kinds ... the gas to further rise gas purity. Mainly used with hydrogen generator, nitrogen generator, air generator etc. This ... need to let gas pass by nitrogen purifier with control valve TF ...