Cheap production of oxygen by pressure swing adsorption - exporter 

Cheap production of oxygen by adsorption at variable pressure is not an engineer’s dream, but an everyday reality at 37 Russian factories, where installations from Chengdu Yizhi Technology Co. have been operating for three years. We launched them in the Siberian winter at −42°C, in workshops without air conditioning, at facilities with voltage drops up to ±15%. None of the systems stopped due to a generation failure - only because the PSA technology here is not “simplified”, but thought through to the valve.

Why “cheap” is not marketing, but calculation

The cost of a cubic meter of oxygen according to PSA does not depend on the name of the technology, but on three numbers:air recovery factor, adsorbent resource, specific electricity consumption per cubic meter. In typical solutions, these parameters are hidden behind general statements of “up to 95% purity.” With us it’s different.

In practice: YZKJ-OX600 module (600Nm³/h, 93±0.5% O₂) consumes 4.8kWh/m³ at an input pressure of 0.75MPa. This is 19% below the market average. Why? Because we use two-stage regeneration: first reducing the pressure to 0.12 MPa, then purging 5% of the purified oxygen flow - without an external source. This approach increases the service life of ZMS-5A zeolite to 42,000 hours (more than 4.8 years of continuous operation), and not to 20,000, as in single-stage schemes.

Clients often ask: “What if the pressure in the network drops to 0.6 MPa?” We answer: “We start the backup compressor - but only for the first 12 minutes. Then the system switches to a stabilized cycle mode with correction of the adsorption time through the built-in Siemens S7-1200 PLC.” This is not a theory. This is logic tested on 147 launches.

An exporter is not someone who sells, but who guarantees work

Some people believe that an “exporter” is simply a supplier with a website and a waybill. But in Russia, where there are no official service centers for Chinese PSA installations, the exporter becomes a technical partner for the entire life cycle.

Chengdu Yizhi Technology Co., Ltd. is a design institute established in 2013 by a subsidiary of Chengdu Huaxi Chemical Technology Co., Ltd. The registered capital is 120 million yuan. This is not a trading platform, but a team of 34 engineers who master the full cycle: from calculating adsorbent volumes according to ISO 8573-1 class 2:2:2 to installing pipelines made of AISI 316L stainless steel with roughness control Ra ≤ 0.4 µm.

We do not ship "finished cabinets". We supply:

• Technological documentation in Russian - with reference to GOST R ISO 8573-1–2022 and TR TS 010/2011;
• 24 month spare parts kit - including SMC VQZ2-15 solenoid valves and METTLER TOLEDO XDK oxygen sensors
• Operator training - 3 days on site, with the issuance of a certificate that meets the requirements of Rostechnadzor;
• Remote monitoring via the YZKJ-Cloud platform: all cycle parameters, adsorber temperature, filter status - in real time.

Where “cheap” turns into “impractical” - and how to avoid it

There is no universally cheap solution. There is a solution that saves money where it is really needed - and does not create hidden costs.

We've seen a customer choose a unit with a stated cost 22% lower - but without an automatic calibration system for the O₂ analyzer. After 5 months, purity dropped to 89.3%. The cause was sensor drift. Recovery took 11 days. Losses amounted to 1.2 million rubles. We calibrate every 4 hours using a reference gas pumped from a built-in cylinder.

Another common scenario: trying to place a PSA module in a room without ventilation. The compressor heats the air by 18°C. At +35°C in the workshop, the temperature at the inlet to the adsorber reaches +53°C - efficiency drops by a third. We always require a heat balance calculation. If it is not there, we refuse delivery. This is not bureaucracy. This is to protect the client's investment.

And one more thing: “cheap production of oxygen by adsorption at variable pressure exporter” is a query that is sought by people who are tired of monthly bills for cylinders and logistics. They want to know: when will the system pay for itself? The answer is specific: with a consumption of 300 m³/day, the payback period is 14–18 months. At 800m³/day – 9 months. We provide free estimates, taking into account the local electricity tariff and current prices for liquid oxygen.

What remains after reading - and what to do next

“Cheap production of oxygen by pressure swing adsorption” is not the price on the website. This is a set of solutions: an adsorbent with a predictable resource, an energy-efficient cycle, local support, documentation that is understandable to Russian supervision.

Chengdu Yizhi Technology Co. has been working with Russian customers since 2019. During this time, we have implemented 52 installations - from medical centers in Krasnodar to foundries in Chelyabinsk. All systems are working. None of them require replacement of the adsorbent ahead of schedule. No contract was terminated due to technical inconsistencies.

If your goal is to obtain oxygen of 93% purity, a stable flow, minimal operating costs and documents that Rostechnadzor will accept, start with calculations. Request technical specifications on the websiteyzkjhx.ru. Please indicate: required flow rate, cleanliness, placement conditions, availability of compressed air. We will send you a payback calculation, equipment specifications and installation schedule within 48 hours.