As an inert gas, nitrogen plays a very important role in daily production and industrial applications. There are many ways to obtain nitrogen, among which the most cost-effective method is to get by PSA (molecular sieve pressure swing adsorption) nitrogen generator. The complete equipment of PSA nitrogen generator is composed of air compressor, compressed air filtration system, PSA nitrogen generator host, automatic control system and air/nitrogen buffer tank etc. Among them, the selection of air compressor is very important, it is very important to the performance and stable operation of the whole nitrogen making system.

Generally speaking, the requirement of compressed air for nitrogen generators is that the oil content of compressed air must be less than 0.003ppm, and the outlet pressure of compressed air should be between 0.75MPa-1.2MPa. Considering the pressure loss in actual production, it will Configure the outlet pressure of compressed air above 0.8MPa.

In order to meet and exceed this requirement, the choice of air compressor must have the characteristics of durability, oil-free, high efficiency and so on.

On the market, there are two common types of air compressors, piston type and screw type (micro-oil type). Piston-type air compressors are characterized by low prices and are not durable. There are two types of piston air compressors: oil-free piston air compressors and oil-filled piston air compressors. Among them, oil-free piston air compressors are beneficial to reduce the oil content of compressed air. The screw air compressor is characterized by high price, long service life, high gas production efficiency, low noise and small maintenance. As a latecomer, screw air compressors have gradually replaced piston air compressors, occupying a dominant position in the market.

In addition to looking at the type of air compressor, you have to choose the right power and displacement. In terms of the exhaust volume of the air compressor, the exhaust volume is 10-15% larger than the air volume required by the nitrogen generator and the rated exhaust pressure of the air compressor should be 0.8-1.0Mpa. So the selected air compressor is scientific and reasonable.