(1) The PSA process is an extremely clean operation and the only ‘raw material’ is air.
(2) Gas production can be done right away when and where it is needed with exact quantity and quality needed.
(3) No loss of production time due to running out of bottled gas
(4) Quick pay-back: only 0.5~1.5 years
(5) No on-going costs (refilling, delivery and transportation charges etc.)
(6) Energy efficient. Only electricity is needed to run the N2/O2 generators.
(7) No safety risks of handling of high pressure cylinders.
(8) In comparison with cylinder N2/O2 it gives overall cost reduction up to 80%.
(9) Safe delivery; controlled flow and uninterrupted N2/O2 supply.

From the two adsorption curves below, while the adsorption pressure is increasing, the adsorption capacity of oxygen and nitrogen molecular by the absorbent increase together. But at certain point, the oxygen molecule reaches the adsorption balance point, which is faster than that of nitrogen molecule, resulting in their different characteristics to do the separation.
The nitrogen/oxygen PSA system bases on this characteristic of selectivity adsorption and utilizes two CMS/ZMS adsorption beds which are pressurized during working to adsorb the Oxygen/Nitrogen, and depressurized to regenerate. The alternating working cycle will continuously produce high purity gaseous nitrogen/oxygen.

CanGas® typical PSA system is composed of PSA generator with a control unit and oxygen monitor. The complete operating system also requires air package consisting of air compressor, air dryer, filters, air-receiving tank and product N2/O2 tank.

CAN GAS PSA systems help you save money on your oxygen/nitrogen gas costs and allow you to produce gas on-site. Simple and cost effective from a supply of compressed air, it helps you avoid rental charges, transportation expenses or limitations, labour costs and so on.

Ambient conditions at the place of installation are very important on the performance of a PSA system.
Temperature: has a significant impact on compressor and dryer performance. The ambient condition of inlet air to the air compressor affects the net weight of the final delivered compressed air to the system. Increases in ambient air temperature reduce the efficiency of air compressors and air dryers. Proper ventilation and ducting of the “compressor room” is required to maintain inlet air temperatures within design specifications. Design working temperatures shall be maintained if the compressors/dryers/boosters are air cooled.
Altitude: Altitude increases, the weight of the atmosphere will be less, resulting in less oxygen or nitrogen in the air for air separation, then compressor will need more power to pump same amount of air as that in flat areas. If you are high in altitude, then you need to oversize the compressor.
Humidity: Humidity affect is not as dramatic as rise in altitude or temperature. However, extremes need to be taken care of and proper measures shall be taken out.

CAN GAS PSA N2/O2 generators require negligible or little maintenance. The major maintenance is required by air compressor and this can be serviced locally anywhere. Filter elements need to be replaced based on maintenance schedule. Please contact CAN GAS service department for spare parts and maintenance.

The on-site PSA gas generator systems are eco-friendly as one can save a lot on transportation of purchasing cylinder gases and unnecessary green-house gas emissions. With on-site PSA gas generator systems you can make your own gas anytime whenever there is a need, this no need to store large quantities of high pressure cylinders and hazardous gas and moreover handling of high pressure cylinders is eliminated.

In order to ensure long-term stable and reliable operation of the nitrogen or oxygen generator system equipment, some routine maintenance work must be done. The main ones include: whether the solenoid valve works normally; whether the pipelines and pipe fittings of the system are damaged or leaked; whether the electrical control part of the system is securely connected, whether the electrical components are normal.

Containerized, skid-mounted, framework type, box-type, truck mounted , trailer mounted are all available.

CAN GAS pays great attention all the time to customer care and gives customers 7*24 all round comprehensive services including pre-sales and after-sales. Beside the routine check with users according to the list of customers built in CAN GAS database by CAN GAS engineers and international service network through site check, phonecall, fax and Email, CAN GAS provides the services listed below at customers’ choice and request.
【Remote instruction service by internet, email, phone call, video call, voice call】
About manuals, settings, preparations for installation/erection/pre-commissioning, commissioning, startup, operation, maintenance, overhaul, calibration, troubleshooting, reprogramming, even changing original design, in short, all kinds of issues, problems or questions that the user may have.
【Onsite service】
According to customers’ official request, CAN GAS would provide the onsite service at reasonable charge, which includes installation & erection guidance, commissioning and startup, maintenance, training, and troubleshooting, etc. This involves in-warranty and out-of-warranty services.
Free training services in CAN GAS factory or facilities inside China For each order, CAN GAS provides 6 days of factory training free of charge for all customers.

The application of PSA nitrogen generators in various industries is more and more extensive. Small scale nitrogen generators gives users simple introduction to the role played by nitrogen generators in the wine industry.
No effect on wine: Nitrogen produced by onsite PSA nitrogen generators is odorless, tasteless, colorless, has no effect on beer taste; can be mixed with CO2. When the recovered CO2 is not enough, it can be mixed with nitrogen and CO2, which is more economical than CO2 alone.
Nitrogen significantly changes the performance of beer foam: Nitrogen is dissolved in the beer, releasing very fine bubbles, making the beer foam more delicate, long-lasting, hanging cup; not reacting with lye: preparing the sake tank with nitrogen, by features of nitrogen and lye, the reaction is washed with an alkali solution when washing the tank, which not only improves the utilization of alkali but also avoids formation of a vacuum in the tank.
Easy to use: Nitrogen generators is not restricted by the fermentation of wine, and has the advantages of simple operation, quick start, and ready to use at any time. Generally, the nitrogen generator produces qualified nitrogen in 20 minutes after startup; the cost is lower: Nitrogen uses air as raw material, and nitrogen is separated from the air by the adsorption nitrogen generator, which has the characteristics of low investment and low operating cost.

Nitrogen is a colorless, odorless, odorless inert gas and can\'t support life while it is not harmful to the human body itself though, but when the nitrogen content in the air is increased, the oxygen content is respectively reduced, making it difficult for people to breathe. If pure nitrogen is inhaled, it will suffocate and cause death due to severe hypoxia. In order to avoid an increase of nitrogen content in the air in the nitrogen generator workshop, the nitrogen produced from the air separation plant shall not be discharged indoors. When repairing nitrogen-filled equipment, containers and pipes, it is necessary to release it to air first, and allow the operation after the oxygen content is sufficient for human. During the overhaul, one should be supervised and the nitrogen valve should be carefully guarded to prevent personal accidents from being accidentally exposed to high purity nitrogen.

The main application of food nitrogen generators is in food packaging. The working principle of PSA nitrogen generator is based on pressure swing adsorption, which uses air as raw material and automatically controls by PLC to continuously produce nitrogen. In general, 15 to 30 minutes, high purity nitrogen can be produced. While product nitrogen is filtered by dust, odor and bacteria filters to meet food-grade hygiene protection requirements.

Since the air contains a certain amount of water and oil vapor, after passing through the compressor, if it is not subjected to strict air purification treatment, the oil vapor is easily adsorbed by the carbon/zeolite molecular sieve, and it is difficult to release, and the pore size of the carbon/zeolite molecular sieve in the nitrogen/oxygen generator is filled, resulting in bad performance of nitrogen/oxygen generator. Carbon/zeolite molecular sieve which is poisoned is damaged & invalid, and can’t be regenerated. Therefore, it is an essential to ensure the service life of the carbon/zeolite molecular sieve of the nitrogen/oxygen generator before the compressed air enters the adsorption tower of the nitrogen/oxygen generator. Although the water is not fatal to the nitrogen molecular sieve of the nitrogen generator, it will increase the adsorption “load” of the carbon molecular sieve of the nitrogen generator, which affects the ability of the nitrogen generator to adsorb O2 and CO2.

Under certain conditions, relying on the gravity differentiation of the oil, the nitrogen gas enters the oil wet crack that cannot be entered by the injected water, and the residual oil is displaced. It relies on the gravity separation of the oil field to replace the residual oil trapped in the fracture hole by gravity. The injected nitrogen is dissolved in the crude oil to expand the volume of the crude oil, and the oil drainage effect reduces the residual oil saturation of the formation under the ground separation condition. It is to change the direction of fluid flow and displace the residual oil in the fracture channel. It is based on the differentiation of oil and gas gravity, and to push out the remaining oil that the injected water in the upper part of the mining structure fails to reach.

Cryogenic air separation nitrogen/oxygen is a traditional nitrogen production method that has been developed in recent decades. It uses air as a raw material, compresses and purifies it, and then uses heat exchange to liquefy the air into liquid air. Liquid air is mainly a mixture of liquid oxygen and liquid nitrogen. The boiling point of liquid oxygen and liquid nitrogen is different (-183℃& -196℃). Let them separate to obtain nitrogen. The cryogenic air separation nitrogen/oxygen production equipment is complex, covers a large area, has high capital construction costs, has a large investment in equipment, high operating cost, slow gas production (12 to 24 hours) after startup, high installation requirements and long cycle. Comprehensive equipment, installation and infrastructure factors, equipment below 3,500Nm3/h, the investment scale of PSA units of the same specifications is 20% to 50% lower than that of cryogenic air separation units. The cryogenic air separation nitrogen/oxygen plant is suitable for large-scale industrial N2/O2 production, while for medium and small scale N2/O2 production it is uneconomical.
In molecular sieve air separation nitrogen/oxygen systems, air as raw material, carbon/zeolite molecular sieve as adsorbent, using the principle of pressure swing adsorption, adopting carbon/zeolite molecular sieve’s selective adsorption of oxygen and nitrogen to separate nitrogen and oxygen, commonly known as PSA N2/O2. This method is a new nitrogen/oxygen-producing technology that was rapidly developed in the 1970s. Compared with the traditional nitrogen/oxygen production method, it has simple process flow, high automation, fast gas production (15 to 30 minutes after startup), low energy consumption, product purity can be adjusted according to user needs in a wide range, easy operation and maintenance, operation low cost and strong adaptability of the device, so it is competitive in nitrogen/oxygen production equipment below 1,000Nm3/h. It is more and more popular among small and medium-sized nitrogen/oxygen users. PSA nitrogen/oxygen has become the first choice for medium and small nitrogen/oxygen users.
Membrane air separation nitrogen/oxygen, air as raw material, under different pressure conditions, different properties of oxygen and nitrogen gas in the membrane with different permeation rates to separate oxygen and nitrogen. Compared with other nitrogen/oxygen-making equipment, it has the advantages of simpler structure, smaller volume, no switching valve, less maintenance, faster gas production (≤3 minutes after startup), convenient capacity increase, etc. It is especially suitable for nitrogen purity ≤ 98% of medium and small nitrogen users with the best price/performance ratio. When the purity of nitrogen is above 98%, it is 15+% higher than the PSA nitrogen generator of the same specification in capital, operation and maintenance costs.

Air compressors have a reduced displacement due to long-term use. Need to increase the pressure to the nitrogen generator: see whether there is blockage before and after the pre-filters, air dryer, etc., check the cause of congestion; whether the air inlet pressure regulating valve is open or adjusted; valve leaks. Check the operation of the valves one by one, check the leaking part.

The pressure equalization of PSA nitrogen or oxygen production equipment is mainly for the rapid increase of nitrogen or oxygen purity. At the same time, the design of pressure equalization process improves the utilization rate of carbon/zeolite molecular sieve, and the design of pressure equalization process enables continuously production of qualified nitrogen or oxygen in the process of switching between two adsorption towers.

Air Buffer tank function: keep the feeding air pressure stable, the two nitrogen/oxygen generator adsorption towers switches once every minute, and the boosting time per switching is only 1~2 seconds, which means that the instantaneous gas consumption is very large, if there is no air tank with buffering effect, the compressed air directly enters the nitrogen/oxygen generator, the air cleaning system in the front stage of the nitrogen/oxygen generator can not process a large amount of compressed air in an instant, so that a large amount of compressed air containing water and oil directly enters the nitrogen/oxygen generator, which inevitably makes the molecular sieve poisoned, shortening the service life of molecular sieves, reducing gas production rate and increasing cost.
Nitrogen buffer tanks will give backflow of nitrogen to the adsorption tower to be operated at the beginning of the nitrogen production process - adsorption. On the one hand, the consumption of compressed air can be reduced, and on the other hand, nitrogen can be quickly obtained to meet the purity requirements.

CAN GAS PSA generators suit gas users who have a fairly steady usage of gas. CAN GAS systems provide a steady output of gas at a given flow and pressure. PSA systems will provide the gas where and when you need and are on standby mode when the gas is not required. Exactly based on customers’ requirements. In some cases, it is desirable to save a surplus supply of gas for use in times of peak demand. You can generate your own gas when and where you need and it can save more significantly than purchasing gas.

CAN GAS PSA gas generators can be used in wide range of applications mainly in aquaculture, medical oxygen in hospitals, modified atmosphere storage, inerting, blanketing, purging, tire filling & manufacture, food and beverage, gold mining, coal mines, ozone production for waste water treatment, marine, laser cutting, electronics, laboratories, electronics, fish farming industries, aviation, outdoor sports, antique protection, underwater filming, cylinder refilling, etc. Contact us to learn how you can benefit from CAN GAS oxygen/nitrogen PSA systems.

30% downpayment and 70% balance before delivery. Letter of credit (L/C) is also workable.

Medical oxygen is considered as drug. While nitrogen used in food industry is additive. Keeping these in mind, CAN GAS adopts Activated Carbon Filter in PSA systems to provide extra filtration and even to remove any odor or any other contamination especially for users from medical services and food industry.

No, with CAN GAS systems you will produce gaseous oxygen or nitrogen at once to users and no need to store it in cylinders like LOX cylinders where liquid N2/O2 of up to 5% of tank volume is evaporated.

0~6.5bar for nitrogen and 0~5bar for oxygen. Higher pressures are customizable by boosters.

The power consumption of CAN GAS PSA generator itself is very negligible (0.1 kW for control unit). Major power consumer in the PSA N2/O2 systems air compressor.

All oil free compressors are extremely more expensive compared with oil injected ones, but as long as the feeding air quality requirements are met, both oil injected or oil free will work.

CAN GAS systems are suitable for both indoor and outdoor installation. If you place the unit outdoors, it has to be covered by a shed or shelter. Rain protection is a must! If you place it indoor, you need proper air circulation/ventilation for compressor and dryer cooling as well as air intake and exhaust for both. There is no special floor requirement and they can be placed on shop floor directly.

Min. life span of the molecular sieve is 5~8 years for ZMS (zeolite molecular sieve for oxygen production) and 6~10 years for CMS (carbon molecular sieve for nitrogen production) under standard working conditions and scheduled maintenance for all parts. The feeding air quality is most important for the performance of molecular sieves. With good maintenance, one of CAN GAS PSA Plant in Bangladesh has been running well for over 13 years without any replacement of molecular sieves.

Medical Oxygen Purity Requirements according to U.S. Pharmacopeia and European Pharmacopeia is 93±3%, according to British Pharmacopeia it is 94%. CanGas® PSA oxygen generators meet these requirements for use in medical application. Liquid oxygen (LOX) at 99% oxygen purity may have some advantages for metal cutting, but not necessarily for medical applications. Some local authorities require 99% purity oxygen due to old regulations and ordinances.
However, with the acceptance of international specifications from CSA (Canada) and ISO 10083 (European) these older specifications are being revised to 93%. There have been powerful competitive interests that have lobbied local authorities to maintain a 99% medical oxygen purity standard to prevent the introduction of less expensive alternatives like PSA oxygen generators.
Of course, CAN GAS provides 99+% PSA Oxygen generators for customer at demand.

Optionally they could be fully automated with unattended operation and remote control.

CAN GAS is an exhibitor of CANTON FAIR every year and of overseas exhibitions in Brazil, Indonesia, Pakistan, Germany, Russia, and so on to get in touch with valuable business partners and customers on earth and to get higher international attention. Obtaining good reputation from customers in 110+ countries in the world, we get repeated orders from many of them with whom we’d developed good long-term relationship, and more importantly, some of them (30+) who have good strength of business had been our local distributors for more than 10 years. CAN GAS even got its trade mark CanGas® certified in the Indonesia to do business in the local market to be fairer and more legitimate. We participate in summit of air separation field, work with universities and institutes and finally get recognized by all sectors of the society.
CAN GAS offer reasonable prices. By customer feedback, market analysis, researching and investigation, successful experiences of 20+ years in the air separation field, we give professional consultancy which contributes to reasonable marketing and pricing basis and tactics in the target markets and market segments. And by developing specialized models for specific applications, we can meet all customers’ requirements of different levels with affordable costs. We might say whenever there is a gas demand, there will be a suitable affordable effective solution from CAN GAS.
CAN GAS take pride in the good quality of its products. Not only get the best functional performance or get the technical targets met, but also insure no quality issue within the design service life of the equipments and ensure that the corresponding standards will be met, especially for batch orders. As a complete plant and system supplier, CAN GAS is ISO9001, ISO13485, ISO45001, ISO14001, CE, BV certificated. The QC department conducts quality plan for each unit being manufactured to achieve the best quality. All the steps including sub-vendor assessment, incoming inspection, process inspection, painting inspection, all kinds of test, performance and function inspection, packing inspection and final inspection won’t be skipped. And by years of effort, we’d developed a good supply chain. Particularly for overseas markets, the accessories and corollary equipments will be from reputable famous brands in the world to ensure the quality of entire plant and best local service and timely support.
CAN GAS offer you the best products. We have wide ranges and full series of standardized models of air separation products of full line for your choice. Customized products are also available at demand. We have our own developing and researching center to give the best solutions to all the market segments. Technical team of good strength and order of 300+ CanGas® units of air separation products every year provide strong basis of developing and researching. 20+ years of experience and time-proven technology and design ensure the productivity and effectiveness of all CAN GAS products. Plus good quality control, strict material selection, professional design, advanced manufacturing technique, 13 strict inspections, even unique compact design with good appearance and humanized, standardized functions and applications, the CAN GAS products had brought sizable profits to all the re-sellers and users in more than 110 countries around the world by More economic, More convenient, More reliable.
CAN GAS is a firm of good reputation. Identified as the Beijing Key High-tech Corporation, CAN GAS is one of the initial companies involved in air separation industry. CAN GAS is committed to continuously providing core value to customers in all industries. With 27,000 square meters’ production base with production equipments of high-end, strong capacity of scientific research, complete and perfect managing system, and an entire floor of 1,000+ square meters’ headquarters in Beijing with clean spacious office environment, CAN GAS had become an integration of R&D, design, manufacture, sales, service of air separation products. Plus the cheerful, energetic, excellent teams and managers, splendid enterprise culture, higher qualified personnel, good enterprise image, high brand awareness, high customer satisfaction, high employee satisfaction, ability of handling huge international projects by abundant capital strength, CAN GAS had been recognized as the industry leader of air separation field. We only do one thing, but we do it right and good - focusing on air separation for 20+ years.
CAN GAS provide excellent after-sales service. We work with customers or consultants appointed by customers to give technical service and consultancy in pre-sales and medium-sales. Periodical mail tracking and call-back by CAN GAS professional service team enable CAN GAS to see clearly and know well the running status and functional performance of each sold unit. The online consultation, product sample, technical guidance, personnel training, installation guidance, commissioning, scheduled maintenance, emergency maintenance, annual survey/calibration, technology support, technical exchange, three guarantees for repair, replacement or compensation of faulty products, 18-month quality guarantee, spare parts stock and supply, especially the local service network established by CAN GAS distributors and long-term partners such as Atlas Copco, clear away all the customers’ worries regarding the after-sales service of any sold CanGas® product.