China high quality Economical Cryogenic Compressor for to Liquid Producing Liquid Oxygen and Nitrogen with high quality

Product Description


Product Description

Process Description:

The basic principle of air separation is use cryogenic rectification to condense air into liquid and separate the air according to the evaporation temperature of each component. The two-stage rectification tower simultaneously obtains pure nitrogen and pure oxygen at the top and bottom of the upper tower. It is also possible to take out liquid oxygen and liquid nitrogen from the evaporation side and the condensation side of the main cooling respectively. The air separation in the rectification tower is divided into 2 stages, air is separated for the first time in the lower tower to obtain liquid nitrogen and at the same time obtain oxygen-enriched liquid air. The oxygen-enriched liquid air is sent to the upper tower for rectification to obtain pure oxygen and pure nitrogen. The upper tower is divided into 2 sections: with the liquid-air inlet as the boundary, the upper part
is the rectification section, which rectifies the rising gas, recovers the oxygen component, and purifies the nitrogen purity, and the lower section is the stripping section to remove the nitrogen components in the liquid, separated to improve the oxygen purity of the liquid.


Air Compression System Air be compressed to 0.5-0.7 Mpa by air compressor, Imported centrifugal air compressor, high efficiency, low consumption, stable and reliable operation
Pre-cooling System The air is pre-cooled to 5-10ºC in the pre-cooling unit, and the moisture is separated. The original imported screw refrigeration compressor and the air-conditioning unit combined with all imported refrigeration components are equipped with a water separator, manual and imported automatic drains to drain water regularly.
Air Purification System Removing the remained moisture, carbon dioxide and hydrocarbons of compressed air in the molecular sieve purifier. The purifier adopts a vertical single-layer bed with simple and reliable structure and low resistance loss; built-in filter, blowing off and purifier regeneration at the same time; high-efficiency electric heater ensures complete regeneration of molecular sieve
Turbo Expander System The air expands and cools in the turbo expander and provides the cooling capacity required by the device.The turbo expander adopts gas bearing, which is simple and reliable, easy to operate, and high efficiency. The cold box of the expander is set separately
Heat Exchange System The air exchanges heat with the refluxing oxygen, nitrogen, and dirty nitrogen in the heat exchanger of the fractionation tower, and is cooled close to the liquefaction temperature, and the refluxed oxygen, nitrogen, and dirty nitrogen are repeatedly heat exchanged to the ambient temperature
Filling System Single gas production: Internal compression process ( Cryogenic liquid pump, High pressure vaporizer, Filling manifold).Multi-gas production: External compression process (Oxygen & nitrogen & argon booster, Filling manifold).


Product Parameters

Liquid oxygen capacity 30NM3/H – 40000NM3/H
Liquid oxygen purity  ≥99.6%
Liquid nitrogen capacity: 30NM3/H – 40000NM3/H
Liquid nitrogen purity  ≥99.99%
Liquid argon capacity 30NM3/H – 1350NM3/H
Liquid argon purity ≤2PPmO2, ≤3PPmN2

 1. Economic comparison:

the energy consumption of cryogenic air separation is low

2. Maintenance comparison:

PSA also has advantages over low temperature oxygen generators in equipment startup and shutdown and unit maintenance

3. Capacity comparison:

PSA’s maximum oxygen production capacity is 200 cubic meters, and
cryogenic technology ranges from 50 cubic CHINAMFG to 50,000 cubic meters.

4. Purity comparison:

PSA oxygen purity is 93-95, cryogenic technology purity is 99.6



  Medical treatment                  Mining and mineral processing           Iron and steel industry

     Aerospace industry                       Metal cutting welding                         Chemical industry




Company Profile

ZheJiang Junfang Machinery Equipment Co., Ltd.

ZheJiang Junfang Mechanical Equipment Co., Ltd., founded in 2008. Its main products include nitrogen generator, oxygen generator,ammonia decomposition hydrogen production, and PSA technology applied to gas manufacturing equipment. The company has a professional R&D and technical team. 

Professional technical support is the driving force for the company’s sustainable development. On the 1 hand, we summarized in practice, found problems, improved technology and improved technology through communication between technicians and customers. At the same time, pay attention to the development of industry technology and learn new technologies.

We also communicate with advanced enterprises in the world. We cooperate with advanced Japanese food companies to jointly break through the application of nitrogen in production. We also provide equipment for CHINAMFG enterprises in South Korea. We have also cooperated with many university research offices in China to improve our technology.

About 100 experienced engineers
Key technical staffs worked in the industry for over 30 years
More than 50 technical patents
Designed over 300 ASP projec

Multiple warehouse factory covers area over 100,000m2.
Advanced production equipment and thorough inspection procedures.
Vanious product lines such as distilation towers, heat exchangers, storage tanks, compressors, etc.
Capable of manufacture coldbox components for up to 80 000Nm3/h ASPs.


Outstanding cost quality ratio
Flexible and minimized construction period.
Installed nearly 200 ASPs
More than 50 experienced site installers

All past ASPs open for client visits.
Thorough ASP operation instruction.
Remote monitoring system.
Regularly after sale visit to help clients on-site.



Packaging & Shipping



Q1:What is your product name?
A: 99.999% purity Cryogenic Air Oxygen Nitrogen Argon Hydrogen Helium Xenon Separation Plant for industrial and medical

Q2: Are you manufacturer or trade company? 
A:We are professional gas generator factory ,we produce oxygen generator, nitrogen generator, hydrogen generator.

Q3: How many oxygen plants do you produce every month?
A: We can produce 10 pcs every month.

Q4: Can you provide sample? 
A: Yes, we welcome sample order to test and check quality. Mixed samples are acceptable.

Q5: How to get a prompt quotation of Oxygen Generator? 
A: When you send inquiry to us, please kindly send it with below technical information.
1) O2 flow rate: _____Nm3/hr( or How many cylinders do you want to fill per day(24hours))
2) O2 purity: _____%
3) O2 discharge pressure: _____Bar
4) Voltages and Frequency : ______V/PH/HZ
5) Application:
6) Project Location:

    Contact Rita: 15238694529







Usage: Nitrogen, Oxygen
Purpose: Gas separation
Parts: Filters
Application Fields: New Energy
Noise Level: Low
Machine Size: Large
US$ 100000/Piece
1 Piece(Min.Order)

Request Sample



air compressor

How Do You Maintain a Gas Air Compressor?

Maintaining a gas air compressor is essential to ensure its optimal performance, longevity, and safe operation. Regular maintenance helps prevent breakdowns, extends the compressor’s lifespan, and promotes efficient operation. Here are some key maintenance steps for a gas air compressor:

1. Read the Manual:

Before performing any maintenance tasks, thoroughly read the manufacturer’s manual specific to your gas air compressor model. The manual provides important instructions and guidelines for maintenance procedures, including recommended intervals and specific maintenance requirements.

2. Check and Change the Oil:

Gas air compressors typically require regular oil changes to maintain proper lubrication and prevent excessive wear. Check the oil level regularly and change it according to the manufacturer’s recommendations. Use the recommended grade of oil suitable for your compressor model.

3. Inspect and Replace Air Filters:

Inspect the air filters regularly and clean or replace them as needed. Air filters prevent dust, debris, and contaminants from entering the compressor’s internal components. Clogged or dirty filters can restrict airflow and reduce performance. Follow the manufacturer’s guidelines for filter cleaning or replacement.

4. Drain Moisture from the Tank:

Gas air compressors accumulate moisture in the compressed air, which can lead to corrosion and damage to the tank and internal components. Drain the moisture from the tank regularly to prevent excessive moisture buildup. Refer to the manual for instructions on how to properly drain the moisture.

5. Check and Tighten Connections:

Regularly inspect all connections, fittings, and hoses for any signs of leaks or loose connections. Tighten any loose fittings and repair or replace damaged hoses or connectors. Leaks can lead to reduced performance and inefficiency.

6. Inspect Belts and Pulleys:

If your gas air compressor has belts and pulleys, inspect them for wear, tension, and proper alignment. Replace any worn or damaged belts and ensure proper tension to maintain optimal performance.

7. Clean the Exterior and Cooling Fins:

Keep the exterior of the gas air compressor clean from dirt, dust, and debris. Use a soft cloth or brush to clean the surfaces. Additionally, clean the cooling fins regularly to remove any accumulated debris that can impede airflow and cause overheating.

8. Schedule Professional Servicing:

While regular maintenance can be performed by the user, it is also important to schedule professional servicing at recommended intervals. Professional technicians can perform thorough inspections, conduct more complex maintenance tasks, and identify any potential issues that may require attention.

9. Follow Safety Precautions:

When performing maintenance tasks on a gas air compressor, always follow safety precautions outlined in the manual. This may include wearing protective gear, disconnecting the power source, and ensuring proper ventilation in confined spaces.

By following these maintenance steps and adhering to the manufacturer’s guidelines, you can keep your gas air compressor in optimal condition, prolong its lifespan, and ensure safe and efficient operation.

air compressor

What Is the Impact of Altitude on Gas Air Compressor Performance?

Altitude can have a significant impact on the performance of gas air compressors. Here’s a detailed explanation:

1. Decreased Air Density:

As altitude increases, the air density decreases. This reduction in air density affects the performance of gas air compressors, primarily because compressors rely on the intake of ambient air to generate compressed air. With lower air density at higher altitudes, the compressor’s ability to draw in a sufficient volume of air is reduced.

2. Reduced Compressor Output:

The decrease in air density directly affects the compressor’s output. Gas air compressors may experience a decrease in their maximum airflow and pressure capabilities at higher altitudes. This reduction in output can impact the compressor’s efficiency and its ability to deliver the required compressed air for various applications.

3. Increased Compressor Workload:

At higher altitudes, gas air compressors need to work harder to maintain the desired level of compressed air output. The reduced air density means the compressor must compress a larger volume of air to achieve the same pressure as it would at lower altitudes. This increased workload can lead to higher energy consumption, increased wear and tear on the compressor components, and potentially decreased overall performance and lifespan.

4. Engine Power Loss:

If the gas air compressor is powered by an internal combustion engine (such as gasoline or diesel), altitude can also impact the engine’s performance. As the air density decreases, the engine may experience a power loss due to reduced oxygen availability for combustion. This can result in reduced engine horsepower and torque, affecting the compressor’s ability to generate compressed air.

5. Considerations for Proper Sizing:

When selecting a gas air compressor for use at higher altitudes, it is crucial to consider the specific altitude conditions and adjust the compressor’s size and capacity accordingly. Choosing a compressor with a higher airflow and pressure rating than required at sea level can help compensate for the reduced performance at higher altitudes.

6. Maintenance and Adjustments:

Regular maintenance and adjustments are necessary to optimize the performance of gas air compressors operating at higher altitudes. This includes monitoring and adjusting the compressor’s intake systems, fuel-to-air ratio, and ignition timing to account for the reduced air density and maintain proper combustion efficiency.

In summary, altitude has a notable impact on the performance of gas air compressors. The decrease in air density at higher altitudes leads to reduced compressor output, increased compressor workload, potential engine power loss, and considerations for proper sizing and maintenance. Understanding these effects is crucial for selecting and operating gas air compressors effectively in various altitude conditions.

air compressor

What Safety Precautions Should Be Taken When Operating Gas Air Compressors?

Operating gas air compressors safely is essential to prevent accidents, injuries, and equipment damage. It’s important to follow proper safety precautions to ensure a safe working environment. Here’s a detailed explanation of the safety precautions that should be taken when operating gas air compressors:

1. Read and Follow the Manufacturer’s Instructions:

Before operating a gas air compressor, carefully read and understand the manufacturer’s instructions, user manual, and safety guidelines. Follow the recommended procedures, maintenance schedules, and any specific instructions provided by the manufacturer.

2. Provide Adequate Ventilation:

Gas air compressors generate exhaust fumes and heat during operation. Ensure that the operating area is well-ventilated to prevent the accumulation of exhaust gases, which can be harmful or even fatal in high concentrations. If operating indoors, use ventilation systems or open windows and doors to allow fresh air circulation.

3. Wear Personal Protective Equipment (PPE):

Wear appropriate personal protective equipment (PPE) when operating a gas air compressor. This may include safety glasses, hearing protection, gloves, and sturdy footwear. PPE helps protect against potential hazards such as flying debris, noise exposure, and hand injuries.

4. Perform Regular Maintenance:

Maintain the gas air compressor according to the manufacturer’s recommendations. Regularly inspect the compressor for any signs of wear, damage, or leaks. Keep the compressor clean and free from debris. Replace worn-out parts and components as needed to ensure safe and efficient operation.

5. Preventive Measures for Fuel Handling:

If the gas air compressor is powered by fuels such as gasoline, diesel, or propane, take appropriate precautions for fuel handling:

  • Store fuel in approved containers and in well-ventilated areas away from ignition sources.
  • Refuel the compressor in a well-ventilated outdoor area, following proper refueling procedures and avoiding spills.
  • Handle fuel with caution, ensuring that there are no fuel leaks or spills near the compressor.
  • Never smoke or use open flames near the compressor or fuel storage areas.

6. Use Proper Electrical Connections:

If the gas air compressor requires electrical power, follow these electrical safety precautions:

  • Ensure that the electrical connections and wiring are properly grounded and in compliance with local electrical codes.
  • Avoid using extension cords unless recommended by the manufacturer.
  • Inspect electrical cords and plugs for damage before use.
  • Do not overload electrical circuits or use improper voltage sources.

7. Secure the Compressor:

Ensure that the gas air compressor is securely positioned and stable during operation. Use appropriate mounting or anchoring methods, especially for portable compressors. This helps prevent tipping, vibrations, and movement that could lead to accidents or injuries.

8. Familiarize Yourself with Emergency Procedures:

Be familiar with emergency procedures and know how to shut off the compressor quickly in case of an emergency or malfunction. Have fire extinguishers readily available and know how to use them effectively. Develop an emergency action plan and communicate it to all personnel working with or around the compressor.

It’s crucial to prioritize safety when operating gas air compressors. By following these safety precautions and using common sense, you can minimize the risks associated with compressor operation and create a safer work environment for yourself and others.

China high quality Economical Cryogenic Compressor for to Liquid Producing Liquid Oxygen and Nitrogen   with high qualityChina high quality Economical Cryogenic Compressor for to Liquid Producing Liquid Oxygen and Nitrogen   with high quality
editor by CX 2023-11-16