CAN GAS PSA generators suit gas users who have a fairly steady usage of gas. CAN GAS systems provide a steady output of gas at a given flow and pressure. PSA systems will provide the gas where and when you need and are on standby mode when the gas is not required. Exactly based on customers’ requirements. In some cases, it is desirable to save a surplus supply of gas for use in times of peak demand. You can generate your own gas when and where you need and it can save more significantly than purchasing gas.