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Oxygen Generators

OGV+ VPSA oxygen generators

OGV+ VPSA oxygen generators for oxygen demand above 100 kg/h

OGV VPSA oxygen generator
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Description

OGV+ VPSA industrial oxygen generator

The OGV+ VSA industrial oxygen generator is 100% oil-free technology with an integrated drying layer and large turndown ratio with variable flow blower and extractor, ensuring maximum energy savings.

OGV VPSA oxygen generator

How does an OGV+ VPSA industrial oxygen generator work?

Atlas Copco OGV+ VPSA oxygen generators consists of two adsorption columns in parallel, in batch sequence switched by automatically controlled valves. Each column includes a drying layer that removes moisture plus CO2 followed by a zeolite type adsorption layer that separates the nitrogen from the air so that the desired component oxygen remains.

 

In this VPSA process, air is sent via a blower into one adsorption column separating the oxygen present in the air from the nitrogen. Once the zeolite in this column is saturated with captured nitrogen, the adsorption cycle automatically switches to the other tower starting adsorption from a freshly regenerated bed ensuring an uninterrupted stable supply of oxygen gas.

 

Simultaneously the first ‘saturated’ tower will be regenerated by an extractor pump that extracts the moisture and nitrogen from the adsorption material making it ready for re-use again.

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Benefits

Benefits

Lowest oxygen costs
No truck shipments of liquid oxygen required. Produce oxygen at the lowest possible costs and CO2 emissions. 
Only produce what you need
​​Produce the amount and purity oxygen that you need, any time and on-site​.
Large turndown ratio
Variable flow blowers and extractor pump ensure a large turndown ratio and guarantee low energy consumption, even at reduced load. 
Efficient at any flow
Constant low specific energy required to produce one unit of oxygen remains.
100% Oil-Free technology
Oil and oxygen are a very hazardous combination. Atlas Copco therefore offers unique 100% oil-free oxygen generation technology including ISO8573-1 class 0 oil-free blower and extractor. 
No air dryer required
The OGV+ has an integral drying layer that captures all moisture and CO2 before the oxygen is concentrated. 

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VSA, VPSA and PSA

What is the difference between VSA,VPSA and PSA

Oxygen VSA (Vacuum Swing Adsorption), Oxygen VPSA (Vacuum Pressure Swing Adsorption) and Oxygen PSA (Pressure Swing Adsorption) are processes used to separate oxygen from other gases in the air. These processes typically consists of two adsorption columns in parallel, in batch sequence switched by automatically controlled valves. Each column includes a zeolite-type adsorption layer that separates the nitrogen from the air so that the desired component oxygen remains.

 

VSA and VPSA technology use a blower to feed air to the oxygen generator to produce oxygen. However, here lies the main difference between VSA and VPSA. In VSA the typical delivery pressure of the blower is a maximum 200-300 mBar (3-4 psi). For VPSA, the typical delivery pressure of the blower lies between 300-1000 mBar (4-15 psi). The consequence is that the VPSA technology can delivery higher oxygen pressure.

 

To be able to remove the captured nitrogen molecules, both VSA and VPSA technologies use a vacuum pump to remove the captured nitrogen in a process step we call regeneration. In both technologies, vacuum pressure levels are the same.

 

Therefore, the main difference between Oxygen VSA and Oxygen VPSA is that VSA operates at lower blower pressure and VPSA operates at higher blower pressure. Also, VSA is typically used for lower purity applications, while VPSA can produce higher purity oxygen.

 

Then what is PSA? PSA is similar to VPSA but simplified without a vacuum pump. Instead of using a blower, a compressor is used to deliver feed air of around 7 Bar (100 psi) to the zeolite bed. Once the zeolite bed in PSA is saturated with captured nitrogen, the pressure is reduced to atmospheric pressure where the nitrogen automatically desorbs, without the help of a vacuum pump, leaving behind pure oxygen. Due to the use of a compressor instead of a blower, typical oxygen delivery pressure is 3.5 Bar (50 psi).

Specification

Technical specification

Model Flow at 93% oxygen level Dimensions CM-In Weight
Nm3/h scfm kg/h tons/day W D H kg lbs
OGV80+ 80 47 105 2.5 2477-975 2989-1177 3609-1421 4086 9008
OGV105+ 105 62 138 3.3 2523-993 3042-1198 3609-1421 4710 10383
OGV160+ 160 94 210 5 2714-1068 3233-1273 3770-1484 6432 14290
OGV270+ 270 159 355 8.5 3578-1409 3899-1535 4037-1589 10140 22354
OGV400+ 400 235 525 12.6 3891-1532 4260-1677 4227-1664 14090 31063

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