Air is colorless and odorless, but is a mixture of gases, the main components of which are oxygen and nitrogen. At the same time, it also contains a certain amount of water and oil vapor.

After the unfiltered air passes through the compressor of the PSA oxygen generation system, the oil vapor and moisture will be brought into the air separation equipment. They are easily adsorbed by the molecular sieve in the oxygen generator and are difficult to desorb and regenerate. Over time, the pore size of the molecular sieve in the PSA oxygen generator will be filled, resulting in poor oxygen production performance. This phenomenon is also called molecular sieve poisoning. The poisoned molecular sieve cannot be regenerated, so the only solution is to replace it. Therefore, before the compressed air enters the adsorption tower of the oxygen generator, it is necessary to ensure that the gas is dry and clean, so as not to reduce the service life of the molecular sieve of the oxygen generator.

According to the actual assembly experience of CAN GAS Systems company limited, under standard working conditions and regular maintenance, the life of molecular sieves of PSA oxygen generator can reach 8-10 years.