Oil-free Air Compressor for Gas Generator

Power your gas generator with purity and reliability—our oil-free air compressors. Engineered for critical applications, they ensure contaminant-free air, enhancing efficiency and prolonging system life. Optimize performance and safeguard your investment.

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Innovative Power Source: Application And Advantages Of Oil-Free Air Compressors In Gas Generators


  • Energy flexibility and reliability: With the transformation of the global energy structure, gas-fired generators provide a cleaner and more flexible energy solution than traditional coal-fired or oil-fired power generation. They can use a variety of fuels such as natural gas and biogas, reducing dependence on a single energy source and improving the stability and reliability of energy supply.
  • Environmental performance: Compared with coal-fired power generation, gas-fired power generation produces significantly lower carbon dioxide emissions, and almost no sulfide and particulate matter, which meets increasingly stringent environmental standards and has become one of the key technologies for achieving sustainable development goals.
  • Rapid response and peak-shaving capabilities: In the power grid, gas-fired generators can quickly start and adjust output power to effectively respond to fluctuations in power demand, especially when renewable energy (such as wind power and solar power) is unstable, playing an important role in balancing supply and demand and ensuring stable operation of the power grid.
  • Distributed energy system: Gas-fired generators are suitable for building distributed energy systems. They can be deployed directly near the power consumption end to reduce transmission losses, improve energy utilization efficiency, and provide independent and reliable power supply for remote areas or places with special needs (such as hospitals and data centers).
  • Scientific research support: In the field of scientific research, a stable power supply is an indispensable condition for the operation of experimental equipment, data collection and analysis. Gas generators can provide uninterrupted power supply for laboratories, field research sites, etc., especially in scientific research activities where the power infrastructure is not perfect or mobile operations are required, their portability and efficiency are particularly important.


In the operating mechanism of gas generators, oil-free air compressors, as core components, play a vital role. Traditional compressors may require lubricating oil to reduce friction and cooling, but this will introduce contamination risks, especially in application scenarios with extremely high gas quality requirements, such as gas mixing and combustion optimization. Oil-free air compressors use innovative air compression technologies, such as dry seals and self-lubricating materials, to avoid contact between oil and compressed air, ensuring the absolute purity of the output gas, which is crucial to maintaining efficient combustion of gas generators, reducing emissions, extending equipment life, and protecting subsequent precision instruments from contamination. Therefore, oil-free air compressors not only improve the performance of gas generators, but also promote their widespread application in industrial and scientific research environments with strict environmental and safety standards.

Introduction To The Basic Working Principle Of Gas Generators

A gas generator is a device that converts chemical energy into electrical energy. Its core is to use the heat energy generated by the combustion of gas (such as natural gas, oil field associated gas, liquefied petroleum gas or biogas, etc.) to drive the engine to rotate, and then drive the generator to generate electricity. Its working process can be roughly divided into the following steps:

① Fuel Supply

The filtered, pressure-regulated and metered fuel gas is sent to the combustion chamber of the engine.

② Mixing and Combustion

In the combustion chamber, the fuel gas is mixed with sufficient oxygen and ignited by the ignition system, and it burns quickly to release heat energy.

③ Energy Conversion

The high-temperature and high-pressure gas generated by combustion drives the piston to reciprocate or the turbine blades to rotate, which is converted into mechanical energy.

③ Generator conversion

Mechanical energy is transmitted to the generator through the crankshaft, and the magnetic field inside the generator cuts the wire to generate alternating current based on the principle of electromagnetic induction.

③ Power output

The generated alternating current is regulated and stabilized, and a stable power supply is provided to the outside.

Gas Generator Air Quality Requirements

In order to ensure efficient and stable operation of gas generators and extend their service life, strict requirements are imposed on the quality of air entering the combustion chamber:

Dry & Water-free

The gas needs to be dried and dehydrated to ensure that there is no free water, crude oil and light oil to prevent corrosion and blockage.


Impurities such as solid particles and oil mist should be removed from the gas. Generally, the impurity particle size is required to be less than 5μm and the content does not exceed 30mg/Nm³.

Calorific Value & Composition

The lower calorific value of the gas must be no less than 31.4MJ/m³, and there are specific requirements for the methane volume content, and the total sulfur content and hydrogen sulfide content are also limited.

Pressure Control

The gas transmission pressure must be maintained within a certain range, such as the natural gas transmission pressure is usually between 0.08 and 0.30MPa.

Oil Contamination Issues & Their Impact On Gas Generators

oil contamination is a common challenge in industrial equipment management, especially in applications with extremely high air quality requirements, such as gas generators. This problem cannot be ignored. Oil contamination not only affects equipment efficiency, but also leads to a series of reactions, ultimately affecting the reliability and economy of the entire system. The following details several major effects of air compressor oil contamination on gas generators, and on this basis recommends the use of solutions.

Impact of air compressor oil contamination on gas generators

  1. Reduced combustion efficiency and output power: Oil contamination will cause oil droplets or oil vapor in the gas entering the combustion chamber, resulting in incomplete combustion, which not only reduces fuel utilization, but also reduces the output power of the generator.
  2. Increased maintenance costs: Oil deposits on engine components, such as combustion chamber walls, spark plugs, turbine blades, etc., will accelerate wear and shorten component life, thereby increasing the cost of frequent maintenance and replacement of parts.
  3. Substandard emissions: Oil contamination will increase the emission of hydrocarbons and other harmful substances in the exhaust gas, making it difficult for gas generators to meet increasingly stringent environmental regulations.
  4. Safety risks: Oil contamination may cause serious accidents such as engine overheating, spark plug misfire or internal explosion, threatening the safety of operators and equipment integrity.
  5. System instability: Oil accumulation may also clog filters and pipes, affecting the stability and control accuracy of air flow, thereby reducing the overall operating stability of gas generators.

In view of the serious impact of oil pollution on gas generators, it is particularly important to use oil-free air compressors as the source of compressed air. Oil-free air compressors, especially high-efficiency oil-free screw air compressors such as those we provide, can fundamentally eliminate the risk of oil pollution and provide pure, dry compressed air for gas generators. Its advantages include:

Zero Oil Pollution

No need to add lubricating oil, avoiding oil from entering the compressed air system from the source, ensuring the absolute purity of the air.

High Efficiency & Energy Saving

The use of advanced design and manufacturing technology ensures high efficiency while reducing energy consumption, which is in line with the trend of energy conservation and emission reduction.

Low Maintenance Cost

The oil-free design reduces the frequency and complexity of maintenance and reduces long-term operating costs.

Long Life Design

High-quality materials and optimized cooling system extend the service life of the equipment and improve the return on investment.

Environmentally Friendly

No oil emissions, in line with environmental protection requirements, helping enterprises achieve sustainable development goals.

Specific Applications of Oil-free Air Compressor In Gas Generator

PSA nitrogen generator

PSA Nitrogen Generator

  • Raw air supply: Oil-free air compressor provides oil-free compressed air as raw material, which is crucial for PSA nitrogen generator, because any oil contamination will affect the adsorption performance of molecular sieve and reduce the purity of nitrogen. Oil-free compressor ensures the continuity and high quality of nitrogen production.
Membrane nitrogen generator

Membrane nitrogen generator

  • Pre-purification: In membrane separation technology, the pure air provided by the oil-free air compressor can directly pass through the membrane component, and the nitrogen is separated by using the difference in the permeability of different gas molecules. The oil-free characteristic avoids contamination of the membrane material, prolongs the service life of the membrane component, and ensures the stability and quality of nitrogen output.
(PSA) oxygen generator

Pressure Swing Adsorption (PSA) Oxygen Generator

  • Critical air supply: PSA oxygen generators also rely on high-quality oil-free air supply. The oil-free air compressor ensures that oil molecules in the air will not clog or contaminate the adsorbent, maintaining an efficient oxygen separation process and improving oxygen extraction rate and purity.
VPSA oxygen generator

VPSA oxygen generator

  • Enhanced efficiency and purity: The temperature swing pressure adsorption (VPSA) oxygen generator is more advanced than conventional PSA technology and has higher requirements for the quality of raw gas. Oil-free air compressors provide pollution-free compressed air to assist the VPSA system in separating oxygen more effectively under different pressure and temperature conditions, thereby improving production and purity.
Membrane oxygen generator

Membrane oxygen generato

  • Efficient air supply and protection: Membrane oxygen generation technology relies on the continuous flow of air through a membrane made of special materials to separate oxygen. The application of oil-free air compressors here ensures the efficiency of oxygen extraction, while protecting the membrane material from damage by oil pollution, maintaining long-term stable operation and high quality of oxygen output.

Selection And Matching Considerations For Oil-Free Air Compressors

The selection and matching of oil-free air compressors is essential to ensure efficient and stable operation of gas generator systems. The following are key factors to consider during the selection process:

1. Select the appropriate compressor model based on the power requirements of the gas generator

  • Evaluate gas demand: First, clarify the air consumption and pressure requirements of the gas generator, which usually depends on the size and design of the generator. The output capacity (usually expressed in cubic meters per minute or cubic feet per minute) and working pressure (such as MPa or pounds per square inch) of the oil-free air compressor should match the specifications of the gas generator.
  • Reserve margin: Considering the fluctuations in actual operation and possible future expansion needs, it is recommended to select a compressor model that is slightly larger than the calculated requirements, but avoid over-selection to reduce unnecessary energy consumption.

2. Energy efficiency ratio consideration: The importance of energy saving and consumption reduction

  • SEER or IEC standards: Pay attention to the energy efficiency ratio of the compressor (such as the seasonal performance coefficient SEER or the International Electrotechnical Commission IEC standard). Choosing an energy-efficient model can significantly reduce operating costs and environmental footprint.
  • Variable frequency technology: Consider whether to use a variable frequency oil-free compressor, which can adjust the speed according to the actual gas demand, thereby saving energy.

3. Environmental adaptability: humidity, temperature, altitude and other factors

  • Ambient temperature: Ensure that the selected compressor can operate stably within the highest and lowest temperature range of the work site.
  • Humidity: In a high humidity environment, consider whether the compressor has a good dehumidification or moisture-proof design to prevent internal parts from rusting.
  • Altitude: Altitude will affect the performance of the compressor. In high altitude areas, it is necessary to select models that can adapt to low oxygen environments or perform performance corrections.

4. Maintenance convenience and after-sales service

  • Easy-to-maintain design: Select oil-free compressors with simple structure and easy maintenance, such as models that are easy to replace filters, inspect and clean.
  • After-sales service network: Investigate the after-sales service system of the manufacturer or supplier, including technical support, spare parts supply, rapid response capabilities, etc., to ensure that problems can be solved in time and reduce downtime.
  • Warranty policy: Understand the warranty period and service content of the product in detail, and choose a supplier that provides comprehensive warranty services.

In summary, the selection of oil-free air compressors is not only based on power matching, but also requires comprehensive consideration of energy efficiency, environmental adaptability and convenience of subsequent maintenance to ensure that the selected equipment can meet the needs of long-term stable operation while maximizing the return on investment.

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