OXYGEN GENERATORS

Generate Oxygen Gas on-site and on demand from thin air. 

Southern Gas Services have been proudly working along side On Site Gas Systems, who are a global leader in manufacturing oxygen generations,  since 1987.  Our partnership has enabled us to supply a complete line of OEM Pressure Swing Adsorption (PSA) generators with outputs up to 5 TPD that have been used in the harshest global environments. The oxygen output purity from these generators typically ranges from 90% to 99%.

As with or On Site Gas System’s nitrogen generators, direct connection to the manufacturer translates into a system that is designed specifically for your production application, that is reliable, cost effective, safe and convenient. All backed by factory support.

On Site Gas Systems are a fully certified ISO 9001:2015 and ISO 13485:2016 manufacturing facility and all of their pressure vessels are ASME certified, meeting the requirements of the New Zealand PECPR Regulations 1999.

Like us, On Site Gas Systems are committed to providing innovative, highly engineered, quality equipment and support.

We have personally relied on the simplicity and reliability of PSA gas generation and founded our company on several generators, which still operate at our Head Office factory in Christchurch.  Have a look through the models listed below and if you have any further questions please contact us directly for a quotation for a generator based upon your current requirements.

OXYGEN GENERATOR OPTIONS:

OXYGEN GENERATORS UP TO 95% PURITY

On Site Gas PSA oxygen generator systems offer an endless supply of oxygen for a wide range of commerical applications. PSA technology gives you access to a cost-effective solution that provides a quick return on your investment and stable year-to-year costs

The generators are simple plug and play making them easy to install and maintain. They require no hazardous zoning and operate at low pressure. 

Each system is fully automated with precision touchscreen control for purity, trouble-shooting diagnostics, maintenance schedules and operational diagrams. 

Unlike other modular PSA generators, systems have been in operation for over 20 years in some of the most remote locations in the world. 

Unit sizes range from the O-1 which produces 0.28 Nm3/hr at 95% to the O-300 which is capable of producing 85 Nm3/hr at 95%.

 

OXYGEN GENERATORS 95% TO 99%

The 99% PSA oxygen generator is a multi-stage system that starts with a 95% oxygen generator as stage 1. The 95% oxygen is then processed through a second stage to produce 99% pure oxygen, which is then boosted through an oxygen compressor in the final stage. The gas is then available in the final storage vessel at the desired pressure and ready to feed into the process application.  

PORTABLE OXYGEN GENERATOR

Battle-tested, always ready, self-contained portable oxygen generators.

On Site Gas Systems’ manufacture FDA-approved portable oxygen generators which are extensively used by the U.S. military, FEMA and many other federal and state agencies. These systems are rugged, self-contained,  easily transportable and capable of producing 93% oxygen at the point of use. 

Oxygen can be used as a direct feed to application, or to fill oxygen cylinders (approved filler certification). Each portable oxygen generator can be operated independently or in multiple combinations to provide unlimited oxygen flow 24/7.

These systems are ideally suited for emergency preparedness and can be quickly deployed using only four people. Oxygen can be produced almost immediately,  in any disaster bypassing any compromised infrastructure or the need for heavy equipment to deliver liquid oxygen. 

POGS 33LPM oxygen at 93%.

Used for direct feed to application, cylinder filling stations or both. 

Easily transportable, compact, reliable and completely self-contained.

Onboard O2 analyser, CO/dew-point monitor 

Contact us today for a competitive quotation.

CYLINDER FILLING STATIONS

An oxygen filling station can be easily incorporated into any oxygen generator system from 93% to 99% purity. This allows you, the customer,  the flexibility of filling your “customer-owned” cylinders to increase the volume and pressure of the available oxygen. Note: Strict guidelines govern the filling and certification of cylinders in New Zealand and the correct regulations and legislation must be adhered to. 

 Compressor pressures and flow-rates are tailored to suit each generator output. Only oil-free or oil-filled oxygen-safe compressors are used. 

Automated filling stations operate unattended and consist of a bank of cylinders, that are filled and refilled, according to pressure switch setpoints defined by the customer. Once the oxygen gas from the storage cylinders reaches a low setpoint the system restarts from standby and refills the cylinders to the upper setpoint.  

For more information on these and other available oxygen generators please feel free to contact us

TYPICAL OXYGEN GENERATOR INSTALLATION

All oxygen generation systems, large or small, contain the same components, just in varying sizes and configurations.

In order to separate the oxygen gas from the air mixture at room temperature, it must be compressed to a minimum pressure of 100 psig (approx. 7 barg).  Once the air is compressed it is then filtered, cooled and the moisture is removed via a refrigerated dryer resulting in very clean and dry air (Dewpoint -70 C).  The input air quality is a significant factor in maintaining the longevity and purity of the overall system.  The process air is then feed onto the PSA beds where the air is separated into its components.  In the case of oxygen gas, all other components are considered as contaminants and are retained on the molecular sieve within the towers and expelled as waste gas during the purge cycle of the process.

Because the system constantly cycles from a state of production, to purge/recycling, the gas produced is not supplied as a continuous stream therefore, a buffer vessel is required to smooth out the gas supply and provide a small storage reservoir.

Maintenance is as simple as changing filters on the generator and following the manufacturers advice on any standalone compressors.

Life expectancy of our equipment is estimated at greater than 20 years. We presonally have PSA generators that have been performing day after day for the last 16 years.

The example below has a high pressure cylinder filling option (additional) for on or off site use.