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HY – PH series pressure swing adsorption hydrogen ammonia gas, cracking unit in methanol decomposition, transform, refining gas, water, city gas, coke oven gas, fermentation, methanol tail gas, acetylene black exhaust emission, formaldehyde, electrolysis gas box, vice, and catalytic cracking gas containing the various sources for raw material, through a special molecular sieve adsorption of purifying low purity hydrogen will to 98-99.99% purity hydrogen purification equipment. Mainly by adsorption tower, the molecular sieve, the pneumatic control group, control system, etc.