Oil-free Air Compressor for Brewery

Discover our top-quality oil-free air compressors, meticulously designed for breweries. Ensure pure, contamination-free air for your brewing processes, enhancing beer quality and safety. Explore our range today!

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Air Quality Requirements For Beer Brewing Process


Beer brewing is a long-standing and technically complex process. It is not just a simple mixture of water, malt, hops and yeast, but involves a series of delicate biochemical reaction processes. The quality, flavor, foam characteristics and stability of beer are directly affected by the brewing process. Therefore, it is crucial to ensure precise control of each brewing link, which is directly related to the market competitiveness of the product and consumer satisfaction.


In the beer brewing process, compressed air, as a commonly used power source, is involved in multiple steps from raw material processing, fermentation, to filling and packaging. For example, compressed air is used to control pneumatic valves, stir fermentation tanks, clean bottles or cans, and fill finished products. However, if compressed air contains even a trace of oil or impurities, it may have an adverse effect on the taste, color and even safety of beer. In severe cases, it may cause product deterioration, damage the brand image and violate food safety regulations. Therefore, beer brewing has extremely high requirements for air quality, especially oil-free, dry and sterile compressed air to ensure the purity and safety of the final product.

air compressor

Oil-free air compressors are designed not to use lubricating oil to lubricate the moving parts inside the compressor. Therefore, the compressed air output does not contain oil molecules, avoiding the risk of oil contamination. This type of compressor usually uses wear-resistant parts made of special materials or innovative airtight designs, such as oil-free scroll type, water-lubricated screw type, etc., to achieve oil-free compression.

In the field of food safety, oil-free air compressors play a vital role. First, it ensures that the compressed air used in the food production process is pure and pollution-free, meeting strict food safety standards, such as CLASS 0 level in the ISO 8573-1 air quality standard, which is essential to prevent food from being contaminated by foreign substances (such as oil). Secondly, the oil-free design reduces maintenance requirements and potential risks caused by oil leakage or incomplete oil-gas separation, which helps maintain the sanitary conditions of the production line. In addition, the high efficiency and low noise characteristics of oil-free air compressors are also in line with the environmental protection, energy saving and sustainable development goals pursued by modern food processing companies. In short, oil-free air compressors are key equipment to ensure the safety and quality of food, especially sensitive products such as beer, and are an important tool for modernizing food safety management.

Which Processes In The Brewery Require Air Compressors?


Process description: Mashing is the process of mixing crushed barley malt with hot water, enzymatically hydrolyzing it at a suitable temperature to release fermentable sugars and form the so-called “wort”.

Compressed air requirements: At this stage, compressed air is mainly used in the stirring system to help evenly heat and ensure that the malt and water are fully mixed to improve the efficiency of sugar extraction. At the same time, compressed air may also be used for cleaning and conveying equipment to ensure the cleanliness of the raw material contact surface and avoid contamination.


Process description: After the wort is cooled, yeast is added to start the alcohol fermentation process. The yeast converts sugar into alcohol and carbon dioxide to form the basic flavor of beer.

Compressed air requirements: Compressed air is used in this stage to pneumatically control the inlet and outlet valves of the fermentation tank, as well as the stirring system, to promote the uniform mixing of yeast and wort and improve fermentation efficiency. In addition, sterile compressed air is essential to maintain the sterile state of the fermentation environment, avoid contamination by foreign bacteria, and ensure the pure taste of beer.

Lagering / Maturation

Process Description: After fermentation, the beer enters the maturation phase, which allows the beer to clarify and develop deeper flavors.

Compressed Air Requirements: Compressed air is used less frequently during this phase, mainly for transferring the beer to the maturation tanks and possible slight stirring to promote sedimentation. Maintaining a sterile environment is still the focus to ensure the perfect development of the beer flavor.


Process description: Filtration is required to remove yeast, protein and other suspended particles in beer to make it clear and transparent.

Compressed air requirements: Filtration equipment often relies on compressed air to drive filter media (such as diatomaceous earth filters) and clean the filtration system. Oil-free compressed air is particularly important here to prevent oil from entering the beer and maintain the purity of the final product.


Process description: Filtered beer is filled into bottles, cans or other containers and prepared for sale.

Compressed air requirements: Pneumatic equipment on the filling line, such as opening and closing the filling head, positioning and conveying the container, labeling and capping, etc., all rely on compressed air. Sterile and dry compressed air is extremely important to ensure the sanitary conditions of the filling process, prevent secondary contamination, and extend the shelf life.

Types Of Air Compressors Used In Breweries

Piston/reciprocating air compressor

A piston compressor drives the crankshaft to rotate through a motor, and the crankshaft drives the connecting rod to push the piston to make reciprocating linear motion in the cylinder. When the piston moves out of the cylinder, the outside air is sucked in; when the piston moves inward, the cylinder volume decreases, the air is compressed and finally discharged through the exhaust valve.

piston air compressor


  • Low cost: The initial investment is relatively small, especially suitable for small breweries or occasions where the demand for compressed air is not large.
  • Easy maintenance: The components are easy to replace, the technology is mature, and the maintenance personnel are familiar with it.


  • High noise: Reciprocating motion produces large mechanical vibration and noise.
  • Low efficiency: Compared with other types, it has lower energy efficiency, and the output pressure fluctuates greatly due to the intervals in the working cycle.
  • Frequent maintenance: Piston rings, air valves and other wearing parts need to be replaced regularly, and the maintenance cost increases over time.

Rotary Screw Compressor

The core of the rotary screw compressor is a pair of intermeshing spiral rotors that rotate synchronously in a closed shell. As the rotors rotate, air is sucked in and compressed between the rotors, and then discharged through the exhaust port. Its compression process is continuous and smooth.

rotary screw compressor


  • Efficient and stable: Provides a continuous flow of compressed air with high efficiency, more suitable for large-scale beer production lines with continuous operation.
  • Low noise and vibration: Compact design, smooth operation, low noise, suitable for indoor installation.
  • Easy maintenance: No wearing parts such as pistons and air valves, long life design, and long maintenance cycle.


  • High initial investment: Compared with piston type, the purchase cost of rotary screw is higher.
  • Oil contamination risk: Traditional oil-lubricated screw compressors need to pay attention to oil separation, otherwise the compressed air may be contaminated, but oil-free screw compressors can avoid this problem.

Scroll compressor

The core of the scroll compressor is a scroll unit consisting of a fixed scroll and a rotating scroll. The rotating scroll rotates inside the fixed scroll, forming a series of shrinking closed spaces, where air is continuously sucked in, compressed and discharged.

scroll air compressor


  • High efficiency and low noise: Oil-free design, extremely quiet operation, high energy efficiency, especially suitable for the food and beverage industry with strict environmental requirements.
  • Low maintenance cost: Simple structure, few parts, reliable operation, and long maintenance cycle.
  • Small size and light weight: Compact design, space-saving, easy to install in a limited brewery environment.


  • Limited output capacity: Relative to the large compressed air demand of large breweries, the output of a single scroll compressor may be insufficient, and multiple units may need to be used in parallel.
  • Initial investment: Although the maintenance cost is low, the initial investment of a scroll compressor is usually higher than that of a piston type.

Recommend Our Oil-free Air Compressor


In an industry like beer brewing that has strict requirements on air quality, we are well aware of the importance of a high-performance, reliable to ensure product quality, maintain food safety and improve production efficiency. Therefore, we especially recommend our oil-free air compressor series, which is specially designed for breweries and other food processing environments with high requirements for air purity.

Choosing our oil-free air compressor is not only choosing a machine, but also choosing a commitment to beer quality, responsibility for environmental protection and vision for future development. We look forward to working with you to improve every detail of beer production and brew more perfect beer. Welcome to contact us for more details and get exclusive solution suggestions

Extremely pure compressed air

The advanced oil-free design ensures that the compressed air does not contain any oil, fully complies with ISO 8573-1 CLASS 0 oil-free standard, perfectly adapts to the stringent requirements of beer production for air quality, and avoids any pollution risks that may affect the flavor and safety of beer.

High efficiency and energy saving

The latest energy-saving technologies, such as variable frequency drive system (VFD), can automatically adjust the output of the compressor according to the actual gas demand, greatly reducing energy consumption, reducing operating costs, and reducing carbon emissions.

Low noise and low vibration

Through precise balance design and sound insulation technology, our oil-free air compressors have extremely low noise during operation, creating a more comfortable working environment and reducing noise pollution.

Stable and reliable, easy maintenance

The use of high-quality materials and sturdy and durable construction ensures the stability of long-term continuous operation, reduces downtime, and reduces long-term maintenance costs.

Customized solutions

We provide a full range of compressed air system solutions, including air dryers, filters, gas storage tanks, etc., which can be tailored to the specific needs of your brewery to ensure efficient integration and optimization of the entire compressed air system.

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