VPSA

The VPSA-oxygen adsorber removes the oxygen from the air, leaving an adsorber gas with a high nitrogen content.

This machine is often called a nitrogen generator.
The VPSA uses a circulated system that creates a small over-pressure that can even overcome a small leakage of the cold store.
This way a low oxygen level is guaranteed. The adsorber is available in various capacities.
The adsorber shown uses the VPSA principle. VPSA is an acronym for "vacuum pressure swing adsorption". For this process two tanks filled with special active carbon are used. In a step-by-step process alternately positive and negative pressures are created in the tanks.

PSA

The PSA (pressure swing adsorption) nitrogen generator produces nitrogen from air by removing oxygen, having a typical residual oxygen content of 1%. However this is adjustable to levels between 1ppm to 5%.

The PSA is suited to producing large amounts of nitrogen under a high delivery pressure.