OGSI is a manufacturer and marketer of on-site oxygen generators. Using Pressure Swing Adsorption (PSA) technology, OGSI offers a complete line of plant sizes form 15 SCFH to 5000 SCFH (5tpd). Additionally, OGSI offers complete cylinder filling plants, with capacities up to 180 cylinders per day. Currently, OGSI now has oxygen plants in over 70 countries worldwide, serving markets such as hospitals, fish farms (aquaculture), mining, ozone water treatment, waste treatment, and metal cutting.

Company details

814 Wurlitzer Drive , North Tonawanda , NY 14120 USA

Locations Served

Business Type:
Industry Type:
Market Focus:
Globally (various continents)
Year Founded:
$1,000,000 US - $10,000,000 US

Oxygen Generating Systems Intl. (OGSI) designs and manufactures oxygen generators. Using Pressure Swing Adsorption (PSA) technology, OGSI offers a complete line of on-site plants with outputs from 15 (7.5 LPM) to 5000 SCFH (5tpd). The typical oxygen purity from our generators is 93% (+/- 3%). With only air and electricity required, OGSI can provide an oxygen generating system that can operate almost anywhere.

In addition to oxygen generation plants, OGSI offers complete oxygen cylinder filling plants (CFP's) with capacities from 1 to 180 cylinders filled per day.

Currently OGSI has oxygen plants in over 70 countries worldwide, serving many diverse markets. Please review the rest of our website to learn how an OGSI oxygen system can benefit you. If you are an oxygen user, OEM or system integrator, OGSI has an oxygen generating system that fits your needs. At OGSI, manufacturing quality oxygen machines is our specialty, and we are happy to discuss special design requirements with you.

If you use more than one cylinder of oxygen per week, OGSI can provide an oxygen generator that will pay for itself in less than two years. The generators can be sized for various requirements starting at two standard cubic feet per hour 2 SCFH up to 5000 SCFH.

By connecting the OGSI generator to your air supply (systems with air compressors are available) you can produce oxygen on demand at considerable savings using Pressure Swing Adsorption (PSA) Technology.

The air we breathe contains roughly 78% nitrogen, 21 % oxygen, .9% argon and the balance is other gases. The oxygen is separated from the air using PSA Technology. The process centers around a molecular sieve known as Zeolite.

At high pressures the sieve adsorbs or attracts nitrogen, and at low pressures it desorbs or releases nitrogen. The OGSI generator consists of two tanks filled with sieve. As high pressure air (about 70 psi) is introduced into the first tank, it passes through the sieve and nitrogen is adsorbed. The remaining oxygen and argon are piped to a buffer or storage tank.

Just before the first tank becomes completely saturated with nitrogen, feed air is redirected to the second tank which then repeats the above process. The first tank is then vented to atmosphere which allows the nitrogen to desorb or release from the sieve. To complete the regeneration of the first tank, a small amount of the oxygen is used to purge it. This process is completed over and over again until the demand for oxygen is met. Under normal operating conditions, which includes the use of clean dry air for separation, the sieve will last indefinitely.

Productivity of a PSA generator is dependent on the oxygen purity required. A generator can produce significantly more oxygen at 90% purity than it can at 95.4%, with a relatively small increase in feed air. By means of a PLC or some other micro processor based controller, it is practical on larger generators for the user to change the swing cycles. Purity and flow levels can be selected and optimized based on changing demand variables.