Oil Free Air Compressors

Product Catalog

Ever-Power: Leading the Industry in Innovative
Oil Free Air Compressor
Solutions

Ever-Power is a globally recognized company specializing in the production and sale of Oil Free Air Compressor. Established with a strong commitment to innovation, Ever-Power has grown into a prominent player in the industry, boasting advanced manufacturing facilities and a highly skilled team of engineers. With decades of experience, the company has developed cutting-edge technologies that meet the demands of various industries, solidifying its reputation for quality and reliability.

The Oil Free Air Compressor produced by Ever-Power are designed to deliver clean, oil-free air, ensuring no contamination during critical operations. These compressors are particularly valuable in industries like healthcare, food processing, and electronics, where air purity is paramount. With their maintenance-free operation, energy efficiency, and low noise levels, Ever-Power’s Oil Free Air Compressor offer significant advantages over traditional oil-lubricated models. These compressors comply with international standards such as ISO 8573-1 Class 0, providing a trusted solution for applications requiring high air quality.

Ever-Power’s expertise in Oil Free Air Compressor technology has earned it a leadership position in the market. The company is dedicated to continuous innovation, ensuring that its products stay at the forefront of technological advancements. In addition, Ever-Power places a strong emphasis on customer satisfaction, offering comprehensive after-sales support and customized solutions tailored to specific needs. With a focus on excellence and a commitment to meeting the highest standards, Ever-Power is a trusted partner for businesses worldwide seeking reliable and efficient oil free air compressors.

Oil Free Air Compressor: The Ultimate Solution For Pure Power

Oil Free air compressors have increasingly become the go-to choice in industries that require high-quality compressed air. Unlike traditional oil-lubricated compressors, oil free air compressors are specifically engineered to prevent any contact between lubricating oil and the compressed air, ensuring the air remains clean and pure. This feature is crucial for sectors with stringent air purity standards, such as healthcare, food production, electronics manufacturing, and laboratory environments.

These compressors utilize a specially designed mechanism that enables compression without the need for oil, preventing any risk of oil mist or droplets contaminating the air. Whether equipped with air-cooling or water-cooling systems, oil free air compressors provide the same level of reliability and flexibility as oil-based screw compressors, while also meeting the rigorous demands for oil-free, clean air. This makes them an ideal solution for industries where air quality is a top priority.

Advantage Comparison

Pure oil-free and water-lubricated screw air compressor VS traditional dry oil-free screw air compressor

Compressed air quality advantages:

	Pure oil-free medium pressure screw air compressor	Conventional reciprocating piston air compressor
Particulate impurities	The water plays a cleaning role in the air, and the dust particles and other impurities sucked in with the air stay in the water and are discharged from the body through the automatic drain and sewage valve	Impurities such as dust particles sucked in with the air and dust particles that are rubbed off by moving parts are compressed together
Oil content	The oil content of the shrinking air is 0PPM, and it has passed the third-party international authority Germany TUV class 0 oil-free certification	When the wiper ring and stuffing box are worn, the lubricating oil will enter the cylinder in the form of gaseous or liquid, resulting in oily exhaust compressed air
moisture content	Isothermal compression, the temperature of the compression chamber is generally only about 45 °C, and the water vapor mixture is separated by the patented water vapor separation barrel, and the water content of the compressed air is low	The working temperature of the compression chamber of the piston machine is about 180 °C, and the exhaust temperature after passing through the aftercooler is about 85 °C, and the compressed air has a high water content
Hygienic cleanliness	All parts in contact with water and air are made of 304 or 316 food grade stainless steel, which is safe and hygienic for food grade.	Most parts that come into contact with water and air are made of ductile iron, cast iron, aluminium or carbon steel, which can easily corrode and rust and pollute the compressed air
Corrosive gas content	The corrosive gases in the air are cleaned with purified water, remain in the water, and are discharged from the body through the automatic drain and sewage valve	The corrosive gas in the air is directly compressed, and after entering the machine, it corrodes the cast iron, ductile iron cylinder, and apparatus of the piston compressor

Advantages in operation and maintenance costs :

	Pure oil-free medium pressure screw air compressor	Conventional reciprocating piston air compressor
Electricity bills for operating energy consumption	The screw machine is high-speed and light-loaded, and the energy saving is about 20% compared with the piston machine when it is all brand new	Low speed and heavy load, high power consumption
Maintenance consumables, accessories	Water filter cartridge, air filter	Oil primary filter, oil fine filter, air valve, piston ring, support ring, oil scraper ring, packing, bearing, etc
Maintenance costs	Low, taking the screw compressor with an installed power of 150kw as an example, the annual maintenance cost does not exceed 20,000 yuan	Taking the piston machine with an installed power of 150kw as an example, the annual maintenance cost is about 100,000 yuan

Equipment stability advantages:

	Pure oil-free medium pressure screw air compressor	Conventional reciprocating piston air compressor
efficiency	The main engine and motor are directly connected to each other, with high transmission efficiency, low power loss, and compression efficiency of more than 95%.	Reciprocating piston type, generally three-stage or four-stage compression, complex structure and pipeline, large pressure loss, high specific power, and large power consumption
shake	The power balance is good, the operation is stable, the coin does not fall when the unit is running, and there is no need to fix the foundation	The force is unbalanced and the vibration is large, so it is necessary to fix the foundation or shock absorption device
noises	The noise is low, taking the 242kw model as an example, the noise is about 80 decibels	The noise is high, taking the 250kw model as an example, the noise is about 110 decibels
temperature	The whole machine is cooled by water, as long as the cooling water pressure and flow rate are ensured, the machine can run stably at about 45°C for a long time	The temperature in the cylinder is about 180°C, which is prone to high temperature alarm shutdown

Device security benefits :

	Pure oil-free medium pressure screw air compressor	Conventional reciprocating piston air compressor
Operational safety	When stopping: the pressure is relieved by the vent valve, and the compression chamber is pressureless, and it can be started directly when it is started again	When starting the operation again, it is necessary to open the air valve with low-pressure gas for unloading, and there is a risk of equipment failure caused by improper operation
Oil-free safety	100% clean and oil-free compressed air, 100% avoid the risk of oil pollution	There is a risk that the lubricating oil will leak into the compression chamber and cause a large amount of oil to be injected after the failure of the wiper ring and the wear of the stuffing box will cause the gap
Fire safety	The operating temperature is low, about 45°C, so there is no need to worry about the occurrence of spontaneous combustion or scalding accidents at high temperatures	The temperature of the compression chamber can reach about 180 °C, and there is a risk of spontaneous combustion at high temperature and burns of personnel.

Permanent magnet motor

We provide custom high-quality motors made from rare earth permanent magnet materials, engineered for superior performance. Designed with an IP55 protection rating and F-class insulation, these motors are built to withstand tough conditions. Fitted with SKF bearings, they ensure dependable operation and uninterrupted 24/7 performance without faults. Our motors are also 3% to 5% more efficient than similar products, offering significant energy savings. Additionally, each motor is customized to meet specific customer needs, delivering exceptional performance and extended lifespan across a wide variety of applications.

Logic programming computer control system

Our cutting-edge control and fault monitoring system delivers extensive functionality with an intuitive human-machine interface, providing real-time access to all operational data for the entire unit. The system features robust remote control capabilities through an RS485 interface. By incorporating an intelligent control system along with Schneider Electric components from France, the motor is controlled via a microcomputer, allowing for highly accurate pressure adjustments within a tight range. This significantly boosts both the equipment’s efficiency and reliability, optimizing overall performance while minimizing operational downtime.

Efficient intake valve

Our air compressor incorporates a proprietary high-efficiency air intake system, guaranteeing 100% reliability. The patented low-point integral air intake design significantly improves compression efficiency, reduces noise during intake, and extends the lifespan of the air chamber. Additionally, the unique modular box structure is designed for easy access, simplifying maintenance tasks and minimizing downtime. This blend of innovative engineering and practical design ensures exceptional performance and long-lasting durability, offering a highly reliable solution for demanding applications.

Water vapor separation tank

Constructed entirely from stainless steel, our system is engineered to prevent any internal debris from detaching during operation. The streamlined plate design enables airflow to quickly reach velocities of 10 m/s, optimizing operational efficiency. This intelligent design ensures effective moisture separation within the system, allowing the moisture to accumulate at the bottom of the water vapor tank. Compressed air is then discharged efficiently through the exhaust port using a minimum pressure valve, ensuring consistent performance and reliability while maintaining a clean, debris-free internal environment.

Stainless steel host

Our self-developed and manufactured stainless steel oil-free compressor host, patented under ZL 201110000872.4, delivers outstanding volumetric efficiency. Featuring an exclusive patented shaft seal design, it ensures long-lasting durability and reliable performance. Built for longevity, the compressor boasts a service life of over 25 years, making it an exceptionally dependable choice for a range of industrial applications. The stainless steel construction offers excellent corrosion resistance and requires minimal maintenance, ensuring consistent, oil-free operation throughout its extended service life.

Lubricating water filtration system

The housing is made entirely of stainless steel, providing exceptional durability and corrosion resistance. It features original filter elements with a multi-layer design composed of high-precision glass fiber cotton, achieving a filtration accuracy of up to 0.1µm. This sophisticated filtration system efficiently purifies the lubricating water, thereby extending the compressor host’s lifespan. By combining premium materials with precision engineering, the system enhances overall performance and minimizes maintenance requirements, offering a highly efficient and reliable solution for various applications.

High quality all stainless steel water cooler

By employing high-efficiency stainless steel plate heat exchangers combined with a multi-stage cooling structure, the cooling area has been substantially increased, significantly boosting the unit’s cooling capabilities. This design ensures that the air compressor’s outlet temperature stays below 55°C, even during continuous operation. The advanced cooling system not only enhances operational efficiency but also ensures the long-term reliability of the equipment, making it a highly effective solution for demanding environments.

Applications Of Oil Free Air Compressor

Spraying Industry

In the spraying industry, where the quality of air directly impacts the finish of paints and coatings, oil free air compressors are essential. They deliver clean air for paint sprayers and coating machines, preventing oil particles from causing defects in surface finishes, resulting in smooth and high-quality applications.

Pharmaceutical Industry

Oil free air compressors are widely used in the pharmaceutical industry, where maintaining sterile environments is critical. They provide pure, oil-free air for various processes such as tablet coating, capsule filling, and pneumatic operations, ensuring the integrity of pharmaceutical products.

PET Bottle Blowing Industry

In the PET bottle blowing industry, clean air is essential for shaping bottles. Oil free air compressors prevent oil contamination during the manufacturing process, ensuring the integrity and clarity of PET bottles while meeting production efficiency standards.

Glass Blowing Industry

For precision applications like glass blowing, oil free air compressors offer a reliable and clean source of compressed air, free of oil and particulates. This helps achieve high-quality, flawless glass products by ensuring the air used in the shaping process remains pure and contaminant-free.

Food Processing Industry

In the food industry, the need for uncontaminated air is essential. Oil free air compressors provide clean, oil-free compressed air for packaging, food handling, and pneumatic machinery, preventing contamination that could compromise food safety. This ensures compliance with food safety regulations and standards.

Medical Industry

Oil free air compressors are vital in healthcare, where air purity is crucial. They supply clean, oil-free air for ventilators, anesthesia machines, and dental equipment, ensuring no contamination risks for patients. The compressors meet stringent medical standards for air quality, guaranteeing safe and reliable operation in hospitals and clinics.

Why Choose Our Oil Free Air Compressor?

Truly Oil-free Screw

Pure water is used for lubrication, directly injected into the compression chamber to provide lubrication, sealing, and cooling. Eliminate the use of any lubricating oil and provide absolute oil-free protection.

Energy saving

Energy saving, high sealing; 55kW for example, it saves 8.8kW /Hour electricity compared to the dry oil-free compressor.
It is connected with motor directly, not any energy lost.
Volumetric efficiency, more air production, 55kW pressure0.8MPa , FAD9.6m³/min
Automatic control system, step less regulation of intake, adjust air production according to demand.

Lifetime Reliability

Force balance, not the force bearing and gas end of the bearing
First level compression, only 7 bearings, few parts, low failure rate
Without synchronous gears, the speed of the air compressor is synchronized with the air end, and the bearing is synchronized with the air end, resulting in a longer service life
35 self diagnostic functions and timely warning

Zero Maintenance

Maintenance leading time is long, no demand of maintenance service
Low working cost and maintenance only to change air filter and water filter
Air end 2 years warranty, designed using life is 25 years of machine
24 hours service time, for emergency, we can provide reserve machine.
Reduce environment burden and carry out 3R, no waste oil
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Single Screw Compression Technology

The compression unit in this design features a screw and two star wheels, resulting in a total of 12 compression chambers. Each full rotation delivers twelve compressions, which significantly enhances efficiency. Single screw compression structures offer optimal stress conditions, allowing the screw to withstand higher pressures and extend its operational life.

1. Advanced Oil-Free Technology for Lifelong Clean Air

This system employs stainless steel components and uses water as the lubricating medium to achieve fluid dynamic lubrication, maintaining a controlled gap. With a main engine speed of just 3000 RPM, there’s no need for lubricating oil in the bearings, eliminating any risk of oil contamination. Designed to last over 100,000 hours, the CM series guarantees the delivery of clean, oil-free compressed air for life. This is possible thanks to the unit’s use of water as a lubricant, along with the absence of a gearbox, cooling oil, and mechanical seals.

2. Ultra-Low Exhaust and Operating Temperatures

By injecting water directly into the main unit for both lubrication and cooling, the unit’s operating temperature stays below 45°C, avoiding the risks of burns or fire hazards. Furthermore, the lower exhaust temperature minimizes the moisture content in the compressed air, reducing the load on post-treatment equipment and improving its overall efficiency.

0 single screw

Comparison of Host Characteristics:

Feature	Water Lubrication Oil-Free Technology	Traditional Oil-Free Technology
Oil	Pure oil-free air, no lubricating oil used	Compression chamber is oil-free but relies on seals
Speed	3000 RPM	6000-25,000 RPM
Compression Chamber Temperature	15°C above ambient	200°C
Compression Host	1	2
Gear Count	0	5-7
Bearing Count	7	>15
Seal Count	Patented, no shaft seal required	>15

Star Disc Innovation

The star disc is crucial for sealing between the screw and fixed components during air compression. Given the friction and wear between the star disc and the screw, we’ve employed aerospace-grade materials combined with proprietary configurations to craft a unique material for the star wheel disc. This advancement effectively solves the wear issue, ensuring the long life and reliability of each air compressor. All units undergo rigorous testing to maintain this durability and stability.

The Process of PET Bottle Blowing Industry

Principles of the PET Bottle Blowing Process
The PET bottle blowing process relies on the physical behavior of polymers. When heated, PET particles melt and stretch, forming a thin film. This technique, known as biaxial stretching, improves the mechanical properties of the bottle wall, boosting its tensile, stretching, and impact strength. Additionally, it enhances the bottle’s sealing capabilities.

PET Blow Molding Industrial Process

0-1.Pre-forming-in-the-PET-blowing-bottle-industry

Preform preparation

PET particles are initially heated and molded into what is known as preforms. These preforms feature a bottleneck shape, while the remainder of the structure is cylindrical.

Heating

The preform is heated using an infrared high-temperature lamp to achieve the optimal temperature and plasticity required for the blow molding process.

Blow molding

The preform is placed into the mold, where the air compressor starts its operation. High-pressure, oil-free compressed air is then injected into the preform, expanding it to fit the mold and forming the final bottle shape.

0-1.Cooling-in-the-PET-bottle-blowing-industry

Cooling & solidification

The bottle is cooled and solidified within the mold to achieve a stable form. To prevent deformation of the bottle neck, it is typically not heated during the blow molding process, and a cooling system is used to keep it at a low temperature.

0-1.disinfect-in-the-PET-bottle-blowing-industry

Demolding & processing

After cooling is completed, the bottle is removed from the mold and may require further processing, such as cleaning, inspection, printing, or labeling.

Portable oil free air compressor for painting

A portable oil free air compressor is an essential tool for painting applications, especially for professionals and DIY enthusiasts who need mobility and clean, oil-free air. Unlike traditional compressors, an oil free air compressor ensures that no oil contaminants enter the air supply, which is crucial when painting. Even the slightest amount of oil can cause imperfections in the paint finish, making oilless technology a superior choice for achieving high-quality results.

With its compact and portable design, a portable oil free air compressor offers flexibility for on-site projects and smaller workspaces. It’s especially useful for automotive painting, furniture refinishing, or even fine art applications, where precision is key. Many of these compressors are designed with lightweight materials and ergonomic handles, making them easy to transport to different job sites.

One of the most critical advantages is its quiet operation. Oil free air compressors are generally quieter than their oil-lubricated counterparts, making them ideal for indoor use or locations where noise is a concern.

Additionally, maintenance is a breeze. Since there is no oil involved, the compressor requires fewer upkeep procedures, saving time and costs in the long run. It’s also an energy-efficient solution, reducing overall operational costs for painting professionals.

Oil Free air compressor for food industry

An oil free air compressor is a critical asset in the food industry, where air quality and hygiene are paramount. Traditional oil-lubricated compressors pose a risk of contaminating the air supply with oil particles, which can compromise food safety. By contrast, oil free air compressors deliver clean, oil-free air, ensuring that food products remain uncontaminated throughout the production process.

In applications like food packaging, pneumatic controls, and ingredient handling, the absence of oil in the compressed air system is vital. Oil free compressors are designed to meet stringent ISO 8573-1 air quality standards, which classify air purity levels required in sensitive food production environments. This guarantees that no oil vapor or particulates come into contact with food, preventing contamination.

Additionally, these compressors operate efficiently in cleanrooms, bottling plants, and processing lines, where air often interacts directly with the product. Their ability to provide reliable, continuous air flow makes them essential for maintaining the consistency and quality of food items.

Another advantage is the low-maintenance nature of oil free compressors. Since there’s no need for regular oil changes, downtime is minimized, enhancing overall productivity. These systems are also energy-efficient, reducing both operating costs and environmental impact.

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Medical grade oil free air compressor

A medical-grade oil free air compressor is a vital component in healthcare settings, where air purity and reliability are essential. These compressors are specifically engineered to provide oil-free, clean air for various medical applications, such as ventilators, anesthesia machines, and dental equipment. Any contamination in the air supply can lead to severe complications, which is why an oilless design is crucial in medical environments.

Oilless air compressors ensure compliance with ISO 8573-1 Class 0 standards for air quality, meaning they deliver air completely free of oil particles, vapors, and aerosols. This is particularly important in critical care units and operating rooms, where patients’ lives depend on the consistency and cleanliness of the air supply. Furthermore, these compressors are equipped with advanced filtration systems to remove any contaminants, guaranteeing the highest level of safety.

Another key feature of medical-grade oil free compressors is their quiet operation. In hospital environments, minimizing noise is essential to create a calming atmosphere for patients. These compressors operate at significantly lower decibel levels than traditional models, enhancing the overall comfort of both patients and healthcare professionals.

Additionally, the low-maintenance nature of oil free compressors reduces the need for frequent servicing, which is vital in maintaining continuous operation in medical settings. They are also energy-efficient, contributing to lower operational costs over time.

Top-rated oil free air compressor for manufacturing

A top-rated oil free air compressor is indispensable in the manufacturing sector, where precision, reliability, and air quality are critical. These compressors provide oil-free air, ensuring that products remain uncontaminated during processes such as painting, assembly, and pneumatic operation. The absence of oil in the air supply not only enhances product quality but also reduces the risk of equipment malfunctions caused by oil contamination.

In manufacturing applications, oil free compressors are favored for their ability to maintain consistent air pressure and flow rates. This is crucial for powering tools like pneumatic drills, impact wrenches, and spray guns, which require a reliable air supply for optimal performance. Many top-rated models are designed with advanced compression technologies, such as diaphragm or scroll designs, that eliminate the need for oil, providing a cleaner alternative without sacrificing efficiency.

Moreover, these compressors are built to operate quietly, making them ideal for facilities where noise control is essential. Their compact design allows for easy integration into existing workflows, and many models feature portability options, enabling manufacturers to move equipment where needed.

Maintenance is another advantage of top-rated oilless air compressors. With no oil to change or monitor, these units require less upkeep, translating into reduced downtime and lower operational costs. Their energy-efficient designs also contribute to significant savings in energy consumption, aligning with sustainability goals in modern manufacturing.

The Role of Air Compressor in PET Bottle Blowing Industry

Throughout the entire PET bottle blowing process, the air compressor plays a vital role during the blow molding stage. It needs to deliver adequate compressed air pressure to swiftly and uniformly shape the preform into the desired bottle form. The quality of the compressed air—free from oil, moisture, and contaminants—directly impacts the bottle’s quality. Any impurities can lead to defects or compromise hygiene. This is particularly critical in the food and beverage packaging industry, where oil-free compressors are essential to ensure the final product adheres to food safety standards.

Blow Molding:
In the blow molding process, the air compressor supplies high-pressure compressed air to expand the heated PET preform into the mold, shaping the bottle. This step is essential in PET bottle production, as the air pressure must be strong enough to overcome the preform’s resistance, ensuring it adheres closely to the mold walls to form the desired shape.

Biaxial Stretching:
During blow molding, the PET material undergoes biaxial stretching, where it is simultaneously stretched both longitudinally and transversely. The high-pressure air from the compressor facilitates this process, enhancing the bottle’s strength and durability.

Oil-Free Operation:
In industries such as food and beverage packaging, it is critical that compressed air is oil-free to prevent contamination. Oil-free air compressors are essential in PET bottle manufacturing, delivering clean compressed air to ensure the final product meets strict hygiene and safety standards.

Pressure Regulation:
Accurate control of compressed air pressure is crucial for ensuring consistent wall thickness in bottles. Low pressure can lead to incomplete formation, while high pressure might cause deformation or breakage. Therefore, the compressor must deliver a stable and precise pressure output.

Cooling and Pressure Maintenance:
Post-blow molding, compressed air assists in the cooling phase, helping the bottle retain its shape until it fully cools and solidifies. Maintaining constant pressure during the cooling phase is also vital for the bottle’s stability and capacity.

Enhancing Production Efficiency:
A high-performance air compressor provides the necessary compressed air to support rapid production rates, thus boosting the overall output of the bottle blowing production line.

Environmental and Energy Efficiency:
Modern air compressors are designed with a focus on energy efficiency, reducing power consumption, lowering operational costs, and minimizing environmental impact.

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Edited by Czh