#ELGi Products

[industrial-air-solutions-cbe]

Pneumatic Tools Wholesaler & Dealer in Tamilnadu | Air Tools

ATS ELGI is an authorized Dealer in Coimbatore & Tiruppur. We provide a complete range of pneumatic tools, ergonomically designed, compact powerful & durable.

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Contact ELGi: 704-943-7966 or send us an email to usa.sales@elgi.com for any compressed air needs.

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Diesel generator dealers in India

Shaktiman Diesel Generators is a leading supplier of Authorized Generator Dealers in India. ISO 9001: 2015 approved. One of Best Generator dealers serving best in quality for 25 years. We provide Diesel Generators with 5 Years Warranty & Quality. The functions of the generator include quick start system where you Just press two buttons and it's up and running Easy, control panel which is a friendly User Control Panel will be provided, international warranty where We offer full international warranties on all our products, just for that extra peace of mind and a few more. Shaktiman Equipments Pvt Ltd . It has a presence across a wide range of businesses as a Distributorship for Air compressor sales, service of ELGI Equipments Ltd, and Original Equipment manufacturer of Diesel Generator for Tamilnadu & Pondicherry. Additionally, the company offers Rental services for all its products, including Godrej Forklifts and Smarta [MLT].

[elgiindia]

Explore ELGi's oil-free air compressors, delivering 100% class 0 air compressors with enhanced energy efficiency and long-term reliability. Ensure critical air quality for your end-products and processes.

[asequipments]

Oil Free Screw Air Compressors | Industrial Oil Free Compressors - AS Equipment

Oil-free compressors draw air into a pre-lubricated cylinder, ensuring permanent lubrication. This process maintains the compressed air quality at the same level as the intake air, keeping it free from oil contamination. They are also lighter in weight and produce as much airflow (CFM) and pressure (PSI) as many oil-lubricated models.

ELGi’s range of oil free air compressors offers 100 percent oil free compressed air solutions which are designed to provide zero risk of contamination with improved energy efficiency and long term reliability . By eliminating oil from the compression process, ELGi ensures that their compressors deliver clean, reliable compressed air, meeting proper quality standards and regulatory requirements worldwide. For the best solutions in clean and reliable compressed air, A S Equipments is your trusted choice for oil free air compressor dealers.

Related Products:

AB SERIES OIL FREE SCREW AIR COMPRESSORS

TWO STAGE WATER COOLED 45–450 KW

[roteck]

Welcome to Roteck Compressor

With close to 28 years of experience in manufacturing of screw air compressors, Roteck Equipment Ltd. is a global leader in providing sustainable compressed air solutions. Roteck designs and manufactures an extensive range of innovative and technologically advanced compressed air solutions for a variety of industry applications. Throughout the years, Roteck has earned worldwide applause for designing customer centric, compressed air solutions which are sustainable, and helping the companies to achieve their productivity goals while ensuring a lower total cost of ownership. Besides, we are delivering superior quality compressed air dryer, Screw compressor, compressed air filters, and oil filter elements at the best prices. We are exporting the products to 6 countries globally. All products are guaranteed to equal or exceed the corresponding OEM Parts and are manufactured and supplied in strict accordance with ISO 9001:2015 quality standards. Roteck compressor is offering overhauling elements of screw compressor and all types of air compressor for those companies which are using the air compressors of these Brands. Atlas Copco, Ingersoll-Rand, ELGI, C.P.T. Kirloskar, Kaeser air compressor.

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Air Compressor Parts and Accessories-Evergreen

Evergreen Compressed Air and Vacuum offers reliable and genuine OEM parts & accessories for all major brands of Air Compressors, Vacuum Pumps and Air Dryers at reasonable cost. We offer services in the state of Washington — Seattle, Tacoma, Everett, Kent, Mount Vernon, Olympia, Auburn. Our air compressor parts such as lubricants, valves, separators, belts, couplings, drains and filters are designed to keep your compressor and vacuum systems running at peak performance and reduce the cost of ownership of your compressed air system. Getting air compressor parts you need is as easy as contacting our team of dedicated service engineers. They are trained to solve problems quickly and efficiently.

Brands we offer

ELGi

Sullivan-Palatek

Sullair

Gardner Denver

Quincy

CP

Rogers

FS-Curtis

Ingersoll Rand

Atlas Copco

Vac-u-lok

DV

Saylor-Beall

Champion

Airtech

Beacon Medaes

Busch

Why do you need to buy air compressor spare parts from OEMs?

Every component within an air compressor has a designated service life and undergoes wear and tear over time, necessitating regular maintenance to ensure optimal performance and longevity. While aftermarket replacement parts may be enticing due to lower costs, it’s essential to prioritize sourcing from Original Equipment Manufacturers (OEMs). OEM air compressor parts ensure proper performance levels and minimize equipment failure risk .

OEM air compressor spare parts offer the following benefits

Durability OEM replacement components offer premium quality assurance and guarantee longevity. Using OEM parts minimises the risk of equipment failure and production performance decline, ensuring consistent performance.

Improved Safety OEMs adhere to industry safety standards, providing enhanced protection for users and minimizing occupational hazards. Third party air compressor spare parts may compromise safety and pose risks to health and the environment.

Efficiency OEM air compressor parts deliver optimal performance over a longer period, reducing downtime and the need for frequent repairs. Investing in OEM parts ensures uninterrupted operation and reduces maintenance demands.

Stringent Quality Standards OEM parts undergo rigorous endurance tests and quality inspections to ensure consistent performance and reliability. Choosing OEM air compressor parts guarantees adherence to quality standards and reliable operation.

Warranty Protection OEM parts ensure warranty coverage and protect your investment. Other parts may void warranties and leave you vulnerable to costly repairs and downtime.

Air compressor parts that need replacement include

Dust filters and oil separators These components are crucial in safeguarding the compressor against damage and performance degradation caused by internal contaminants. Dust particles from inlet pose a significant threat to compressor rotors, leading to reduced efficiency and premature wear.

Air filter Swapping your air compressor’s line filter cartridge with counterfeit alternatives compromises filtration efficiency, resulting in pressure drops and compromised air quality. Genuine airline filters ensure optimal filtration, reducing the need for frequent replacements and minimizing lifecycle costs.

Lubricating oil Lubricating oil is essential for maintaining system efficiency and preventing equipment breakdowns. Poor-quality oil can lead to sediment buildup and corrosion risks, undermining compressor performance. Using genuine oil supplied by the manufacturer ensures effective lubrication and maximises equipment longevity.

It’s essential to procure spare parts and air compressor accessories exclusively from OEMs and reputable suppliers and maintain a service kit containing essential tools for safe part replacement. Talk to our parts specialist today.

Other products

Air Compressors

 Vacuum Pumps 

Air Dryers

[atselgi]

All you need to know about PDR Equipment- Glue Puller

Glue Puller is a Paintless dent removal system. Typical examples are dents from parking or hailstones. They are suitable for all models of passenger cars , SUV and MPV

PDR Equipment- Glue Puller

This tool allows the user to glue and pull without the high temperatures of welding pull tabs.The kit comes with wide variety of tabs, a pulling harness with arms, glue gun, plastic scraper, knock down tool with release agent.

About Glue Puller

The glue repair technique is a standard procedure for most modern PDR techniques. The Glue Puller makes pulling easier by having a two-handed pulling unit.

What is glue gun glue

Hot-melt adhesive (HMA), also known as hot glue, is a form of thermoplastic adhesive that is commonly sold as solid cylindrical sticks of various diameters designed to be applied using a hot glue gun.

Does hot glue damage car paint?

No, it won’t damage the paint. After finishing your repair, you should remove the glue with a few drops of alcohol, which will keep your paint intact.

Advantages of glue puller

Increases productivity

Dents are always accessible

Reduces operator fatigue

Easy to train and delivery faster

Conclusion

Dent removal equipment offers a diverse array of tools tailored to various dent sizes, shapes, and accessibility challenges. PDR kits designed for professional accuracy, choosing the right equipment depends on the severity of the damage and your skill level. Choose from the wide range of PDR equipment from ATS ELGI like Battery Operated Dent Puller, Dent Liner, Plastic Repair Kit, and many others.

Other Blog Posts

PNEUMATIC SPECIALITY TOOLS

The Necessity of Motorcycle Wheel Balancing

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Top 10 Industries that Benefit from ELG i' s EQ Series Compressors

For industries seeking durable, reliable, and energy-efficient compressors, VEMC offers an exceptional solution in the form of ELGi 's EQ Series Compressors. To explore the range of ELGi Screw Compressors available, contact us on +91 98199 07445. VEMC is a pioneering leader in the arena of electromechanical engineering products, allied equipment, and services with an ISO 9001:2015 certification.

[elgiafrica01]

Oil Free Compressor | Oil Free Screw Compressor | ELGi

OIL FREE SCREW AIR COMPRESSORS ELGi’s oil free screw compressors are the backbone of a range of industrial applications. Designed and engineered to meet international quality and safety standards, these industrial oil free compressors offer peace of mind to users who require oil free air compressed air for sophisticated applications. Oil free screw compressors from ELGi are the backbone of a range of industrial applications. Industrial oil free compressors are designed and engineered to meet international quality and safety standards, ensuring compliance and peace of mind for businesses. Customers rely on the oil free range for sensitive applications with zero tolerance towards oil and lower environmental impact.

Oil free compressors are designed to provide contaminant-free compressed air, making them indispensable for critical applications in food processing, pharmaceuticals, electronics, and other sensitive industries. Unlike lubricated compressors that use oil to lubricate moving parts and cool the compression process, oil free compressors utilise special coating on the rotors to offer adequate lubrication for the compression without introducing any oil into the compressed air.

SCREW COMPRESSORSPISTON COMPRESSORS

ELECTRIC OIL FREE SCREW AIR COMPRESSORS

AB SERIES OIL FREE SCREW AIR COMPRESSORS

ELGi is one of the few compressor companies to design and manufacture airends for Oil free air compressor technology. Our new AB series compressors provide disruptive benefits in terms of efficiency, reliability, and air quality, resulting in lower life cycle cost and high uptime. The high quality air output with Class-“0” certification makes our AB Series the best oil free air compressor for sensitive applications in pharmaceuticals, food and beverage industries where oil free compressed air is critical.

KNOW MORECONNECT WITH US

ELECTRIC OIL FREE SCREW COMPRESSORS

OIL FREE SCREW AIR COMPRESSORS 90 – 450 KW / 480 – 2515 CFM

ELGi is amongst the few screw air compressor manufacturers with an in-house designed and manufactured oil free airend. ELGi’s oil free compressors provide Class-“0” certified oil free compressed air with leading energy efficiency, reliability, and low operating costs supported by best-in-class warranty.

KNOW MORECONNECT WITH US

ADVANTAGES OF OIL FREE SCREW COMPRESSORSOil free compressors, including water injected screw compressors, are specially designed to provide contaminant-free compressed air, making them indispensable for critical applications in various industries. Whether maintaining product integrity in the food and beverage industry or ensuring critical processes in pharmaceuticals and electronics, oil-free and water injected screw compressors play a vital role.Zero Oil ContaminationThe primary advantage of oil free compressors lies in their ability to deliver compressed air without any oil content. This ensures that the air remains completely free from oil particles, safeguarding the integrity and quality of the end product in critical industries.Compliance with Stringent StandardsIn pharmaceuticals and food processing industries, adhering to strict quality and safety standards is essential. Oil-free compressors play a crucial role in ensuring compliance with these standards, minimising the risk of product contamination.Enhanced Air PurityWith oil-free compressors, you can achieve higher air purity, making them ideal for applications that demand clean air, such as laboratory equipment, clean rooms, and precision instruments.Reduced Maintenance CostsOil-free compressors eliminate the need for oil changes and related maintenance tasks, reducing operational costs and downtime.Eco-FriendlyAs oil-free compressors eliminate oil consumption and the associated disposal of oil-contaminated condensate, they contribute to a more environmentally friendly operation. Leading oil free compressor manufacturers prioritise environmental sustainability by incorporating eco-friendly features into their designs.APPLICATIONS OF OIL FREE SCREW COMPRESSORSFood and Beverage IndustryIn the food and beverage industry, oil-free compressors are essential for air agitation, pneumatic conveying, and packaging, where even the slightest contamination may compromise product quality.Pharmaceutical IndustryIn pharmaceutical manufacturing, where sterile conditions are essential, oil-free compressors are necessary to provide contaminant-free air to processes such as tablet coating, aseptic packaging, and fermentation.Electronics ManufacturingPrecision electronics manufacturing requires ultra-clean air, making oil-free compressors ideal for applications like chip manufacturing, PCB cleaning, and cleanroom facilities.Healthcare and Medical FacilitiesOil-free compressors find application in medical devices and equipment, such as ventilators, dental instruments, and surgical tools, ensuring the delivery of pure and uncontaminated air.WHY CHOOSE AN OIL-FREE COMPRESSOR?When it comes to maintaining the highest air quality and reliability in critical applications, oil-free compressors are the preferred choice. Eliminating oil from the compression process ensures product integrity, compliance with industry standards, and peace of mind for operators. With reduced maintenance requirements and enhanced efficiency, investing in an oil-free compressor is a wise and cost-effective decision for industries where air purity is non-negotiable. CONTACT Corporate Office

ELGI GULF (FZE) PO Box: 120695, P6 – 27, SAIF Zone, Sharjah, U.A.E.

Tel: +971 6 557 9970 Email: gulfenquiry@elgi.com

[elgime]

Understanding Screw Air Compressors

When selecting a suitable air compressor for your business, a few factors must be considered beyond the cost. The efficient functioning of material handling, spray painting, machine tools, and various other operations rely heavily on a reliable compressed air system.

Air experts often suggest the use of screw air compressors. These compressors offer high efficiency, continuous operation, low noise levels, a compact design, and exceptional reliability.

How Screw Air Compressors Work?

Screw air compressors are known for their efficiency, dependability, and ease of use. They employ the use of oil for cooling, sealing, and lubrication within the compressor. The core of a screw compressor comprises of two rotating elements known as rotors. These rotors feature interlocking helical grooves that progressively reduce the volume of air as it passes through the compression chamber.

As the rotors rotate, they draw in the surrounding air, trapping it between their lobes and gradually compressing it as the volume diminishes.

Types of Screw Air Compressors

Screw air compressors can be classified into two main categories: oil-free and oil-lubricated.

Oil-free Screw Air Compressors: Oil-free screw air compressors eliminate the need for oil for lubrication. Instead, they use alternative lubricants such as distilled water, PTFE, or proprietary coatings. These compressors are specifically designed for applications where the presence of even the slightest trace of oil is deemed unacceptable. Industries such as food and beverage production, pharmaceuticals, and research rely heavily on oil-free compressors to ensure compliance with strict purity standards and regulations.

Oil-lubricated Screw Air Compressors: Oil-lubricated screw air compressors incorporate the use of oil for lubrication and efficient heat dissipation. The oil is separated from the compressed air stream, undergoes filtration, and then recycled for continued usage. These compressors are commonly employed in industries where minimal traces of oil are tolerable, such as construction, mining, and automotive.

Benefits of Screw Air Compressors:

Screw air compressors are highly favoured by air experts and industry professionals due to various reasons. Some of them are:

1.High Efficiency: The continuous compression significantly reduces energy wastage compared to reciprocating compressors, where compression occurs intermittently, thus offering increased efficiency.

2.Continuous Operation: These compressors ensure a steady and uninterrupted supply of compressed air. Their design enables them to operate continuously without the need for frequent start-stop cycles, which can compromise both efficiency and the lifespan of the equipment.

3.Low Noise and Vibration: Screw air compressors are notably quieter and generate less vibration compared to other compressor types.

4.Reliability and Low Maintenance: Screw air compressors offer improved reliability and require minimal maintenance. This reduces downtime and lowers maintenance costs for businesses.

Why Choose ELGi Screw Air Compressors?

Rotary screw air compressors are essential equipment in many industries worldwide. Their unique airend design, coupled with state-of-the-art features and groundbreaking technology, provides cost-effective, durable, dependable, and high-quality compressed air that fits a wide range of industrial applications

AB Series:

ELGi's AB series uses oil-free compressor technology. These air compressors provide exceptional efficiency, reliability, and air quality, resulting in cost savings and improved uptime. These compressors are Class-"0" certified, ensuring the production of high-quality air that meets the stringent requirements of sensitive industries such as pharmaceuticals and food and beverage.

EN Series:

ELGi's EN series oil-lubricated screw air compressors are known for their reliability, low maintenance, compact design, and efficiency. They feature efficient air-oil separation technology and belt drive transmission for optimal power transmission over long distances. Optional variable frequency drives are available to match output with demand, saving energy by eliminating frequent load-unload cycles. The EN series finds applications in industries such as textiles, automotive, paper, food processing, as well as small machining and fabrication workshops.

EG Series:

ELGi's EG series oil-lubricated screw air compressors offer an advanced design and superior performance. Each component is meticulously engineered for reliability and easy maintenance. With energy-efficient eta-V profile rotors, these compressors deliver optimal performance. Manufactured in compliance with international standards, the EG series is widely used across industries and is accompanied by a top-tier warranty program and low operating costs.

[industrial-air-solutions-cbe]

Borewell Compressor Pumps and Motors

Borewell Compressor Pumps and Motors

By pressurizing air and forcing it through pipes into borewells, borewell compressor pumps create a mixture of compressed air and water that is less dense than the surrounding water and therefore flows upwards. Borewell compressors are used for agricultural, industrial and domestic purposes for decades. With extensive experience in the industry, ELGi manufactures borewell compressor pumps and motors that are highly efficient, reliable and economical. Industrial air solutions is an authorized dealer of ELGi borewell compressor pumps and we offer both single and two stage borewell compressors. They are suitable for continuous use in food processing, farming, and the medical industry. These pumps consume low power and can be used in single or two stages with no clogging. So choose the right air compressor for your business.

Features of ELGi Borewell Compressors

Designed for efficiency close to zero maintenance

Highly efficient crank shaft with roller

Rust proof and robust steel casting body

Non-stop performance and hardly heats up

Prompt and efficient after sales service

High quality

Only pipelines are kept in the borewell. The borewell compressor pump and motor can be erected at any convenient place

Maintenance Practises

To prevent breakdown, serious damage and extensive downtime, a definite schedule of preventive maintenance inspections should be followed.

Do not operate the compressor with the valves shut off. It might lead to some damage.

Check the starter functionality.

Cool down the compressor before working because the compressor gets heated up during the operation.

Clean the compressor pump regularly.

Inspect the crankcase for oil levels. Consider refueling with the right grade and quantity of oil if necessary.

Check the tension of the belt.

Make sure the air filter is clean, and that the breather valve is seated properly by disassembling, cleaning, and checking once in a month.

To avoid leakage all the pipe joints should be checked.

If you notice any abnormalities in the working of your borewell compressor pump, contact the dealer from where it was purchased.

[elgiusa]

15-300 HP Air Compressors | From ELGi USA

15 HP – 300 HP EG SERIES

REQUEST A QUOTEDOWNLOAD BROCHURE

ELGi’s EG Series oil-lubricated screw air compressors offer a robust compressed air solution for many industries including manufacturing, aerospace, chemical, and packaging . The EG Series ranges from 15 hp to 300 hp and are designed with the end-users in mind. ELGi’s industrial air compressors are equipped with our unique air end design offering reliability and efficiency.  The EG Series industrial screw compressor are engineered to deliver high performance and energy efficiency to save operating expenses while maintaining air quality. The ELGi EG Series’ advanced package design not only minimizes system losses to maximize energy savings, but also offers ease of service and low noise levels.  ELGi is the only air compressor manufacturer to offer a life-time air end warranty and a five-year compressor package warranty.*

*Terms and conditions apply

WHY ELGi's EG SERIES SCREW AIR COMPRESSOR?

Highly Efficient Airend - Superior Energy Efficiency At the heart of ELGi's EG Series oil-lubricated screw air compressor lies a unique air end equipped with proprietary η-V profile rotors featuring a 4/5 lobe combination. ELGi’s industrial compressor’s air ends operate at low speeds, maximizing energy efficiency. The EG Series air ends come with a life time warranty. ELGi’s life time air end warranty extends to the entire range of EG Series air compressors, ranging from 15 HP to 300 HP.

Best-in-class Maintenance and Operation Cost The EG Series screw air compressor comes with ELGi's next-generation technology of oil-injected screw rotors, designed for easy access, with a hinged panel design, stainless control lines, and O-ring flanged faces that eliminate leaks. A filtered cabinet extends the life of components. As a result, they provide high-quality compressed air even in extreme environmental conditions and offer long and trouble-free life with low operation costs. The EG Series industrial compressor’s package is designed to ensure ease of maintenance saving you money on your routine service.

Advanced Package Design - Functional and Aesthetic Our package is configured with subsystems designed to minimize energy losses, making it a highly energy-efficient solution. In addition, it offers ease of service, and maintains low noise levels, ensuring smooth operations.

Reliable and Efficient Motels The TEFC severe duty motors in the ELGi's EG air compressors are built with a larger core and increased windings, offering reliability and efficiency. Their direct coupling with the air end enhances energy efficiency, while high ambient ratings make them a reliable choice for all industrial applications.

Lowest Oil Carryover in the Industry (< 1ppm) ELGi has developed a unique OSBIC process (Oil Separation by Impact and Centrifugal action) to separate air and oil with minimum pressure drop. This process involves removing oil in three stages, delivering consistent low oil carryover in the compressed air, reducing the oil discharged into the environment. This efficient method also increases the life of the air-oil separation filter.

Efficient Cooling System - Large Cooler and Optimized Fan The oversized and bolted cooler design eliminates thermal stresses, extends the compressor's life, lowers power consumption, and maintains low discharged compressed air temperatures, reducing the load on downstream equipment.

Best-in-Class Warranty Program ELGi offers a best-in-class warranty on its products and components, ensuring they provide complete peace of mind. The EG Series rotary screw air compressor comes with a lifetime air end warranty and a five-year package warranty, providing customers with best-in-class compressed air products and industry-leading warranty coverage.

Reliability Under Extreme Conditions - Robust and Reliable The EG Series industrial air compressors are designed to perform in extreme conditions, from cold to hot and from dry to highly humid environments, with ambient temperatures reaching up to 115°F. Optional outdoor modifications and low ambient designs are also available to ensure maximum running time throughout the year.

Optional Variable Speed Drives for Energy Efficiency Maximize energy savings with the optional Variable Frequency Drives (VFD). ELGi’s integrated VFD matches the compressor output with the demand by varying the motor speed. This results in reduced power consumption following the reduced demand, thus eliminating the frequent load-unload cycle, and offering an energy-efficient solution with low operating speed, low maintenance and low sound level.

Operating Data and Safety Measures The EG industrial air compressors are equipped with high-pressure trips, high-temperature trips, pressure relief valves, low-voltage trips, single-phase preventers, and reverse rotation prevention mechanisms, to ensure the highest level of safety.

WHY CHOOSE THE ELGi EG SERIES SCREW COMPRESSOR?

Watch the video to learn how the EG Series air compressors lead in maintenance, cost of ownership, and quality.

To know more, watch the video Read More Contact us

Elgi Compressors USA, INC 4610 Entrance Drive, Suite A Charlotte, NC 28273 USA

Tel : 704-448-2510 Email : usa.sales@elgi.com

[elgiaircompressorsindia-blog]

Making Screw Air Compressors Oil-free

It might be hard to believe but air compressors have been around for thousands of years. The earliest known compressors were bellows, used to blow compressed air into furnaces to stoke up the heat, thereby allowing ancient men to produce stronger and better metals for tools and weapons. >

Following the invention of steam engines, they became a popular method to power air compressors. Subsequently, Internal Combustion (IC) engines began to be used as a power source for operating reciprocating air compressors. Later, as larger industries were established, they demanded more efficient compressors capable of running with minimal maintenance and for longer periods. A rotary air compressor was the answer. Both these types of compressors continued to evolve over time and today, they are both highly efficient and technologically well advanced. Conventional reciprocating air compressors though have certain innate limitations; most notable being that the oil used for lubrication is carried along with the compressed air. Filtering removes much of the oil but not all of it. For example; pre-filters, high efficiency coalescing filters and activated carbon filters remove trapped oil to a great extent.

Oil-free compressed air solutions are used extensively in the pharmaceutical, textile & automotive industries.

 But these filters themselves have characteristic limitations. For instance, above 20°C, coalescing filters do not remove fine oil vapours, leaving very fine particles of residual oil in the form of aerosols; and activated carbon filters are not usable at filtration temperatures above 40ºC because the carbon then absorbs the oil vapour, gets saturated, and becomes ineffective. And, filtration itself raises another problem: safe disposal of used filters to avoid environmental contamination. Notwithstanding the environmental issue however, there are several industrial applications that require compressed air that is completely oil-free. Food and beverage, pharmaceuticals, electronics, automotive painting, textiles, paper and cosmetics are typical examples. These applications demand wide operating temperatures of 0-45°C, stringent air purity standards higher than ISO 8573-Class I, high levels of safety, eco-friendly operation and some more. Even the most advanced filtration technology falls short of meeting such exceptional standards of air purity.

Plainly, lubricated compressors were not the answer. It required a radically new technology of air compression. Enter oil-free screw air compressors.

ELGi’s Screw Compressors are designed to save energy and ensure long life.

This inventive machine uses no lubricating oil in the compression chamber and hence delivers compressed air with practically no trace of oil. Additionally, because of the continuous sweeping motion of the screws – two meshing helical screws known as rotors, driven by a pair of timing gears – there is very little pulsation or surging of flow, which occurs with piston compressors. Screw compressors thus deliver smooth, pulse-free compressed air. They also tend to be compact and run smoothly with minimal vibration. Since they also employ a more efficient compression system, they not only reduce energy costs but also enable precise adaptation to end-user requirements based on careful study and analysis of their critical processes and customising with a controlled, total compressed air system, thereby also improving productivity.

Despite all its apparent advantages, oil-free screw air compressors continued to face technological and manufacturing challenges, especially pertaining to the problem of overheating due to the absence of lubricating oil in the compressor chamber. Furthermore, despite being oil-free, there was still the need for filtration as hydrocarbons and other contaminants ingested from the ambient air required to be removed prior to the point-of-use. All this began to affect their popularity to some extent. However, this also prompted a new development: oil began to be injected into the compression cavities to not only aid sealing but also provide a cooling sink for the heat of compression.

In this so-called ‘oil-flooded’ rotary screw compressor, the oil was then separated from the compressed air, cooled, filtered and recycled. The injected oil not only helped in lowering the compression temperature but also captured extraneous particulates from the incoming air, thus effectively reducing the particle loading of subsequent air filtration. Having thus overcome the initial problems that oil-free compressors faced, there was a shift from oil-free to oil-flooded compressors, which then gained popularity.

Oil-Free Two Stage: Air-Cooled Model

But the need for a completely oil-free compressor remained. This was felt keenly in industrial applications where even traces of oil in processed air could be disastrous. For instance, even minute particles of oil in precision electronic circuitry or critical semiconductor components can play havoc with electronic gadgets. Lube oil traces in processed food and beverages mean serious health risks. Pharmaceutical applications demand pristine air too. It is the same with paper mills, textiles, high-gloss painting of automobiles and many others. While Western countries had strict regulations governing the purity of air used in such critical applications, Asian countries including India and China had less stringent rules. But it was only a question of time before they too fell in line. And, although industries continued to rely on filtration to get rid of the entrapped oil, complex filtration equipment added to the cost, created air pressure drops and still did not deliver 100% oil-free air. At ELGi, this presented a situation ripe with potential.

Oil-Free Two Stage: Water-Cooled Model

ELGi embarked on developing the oil-free screw air compressor by obviating the need for oil as a medium to carry away the heat of compression. By early 2005, the first prototype was assembled and tested. And by early 2008, a test compressor was commissioned at a user’s facility for validation. Next year five more were commissioned at different locations. These models completed 10,000 hours of validation. Regular sales began by early 2011. Today, ELGi’s in-house oil-free technology with inter-cooler has been validated in demanding industrial applications for over 150,000 cumulative hours.

Inside the ELGi factory

The fully-packaged ELGi-NE series has models with high volumetric efficiency that deliver from 500 to 1800 cfm (cubic feet per minute) and pressures of up to 10 bars (kg/cm2.) Incorporating superior safety norms, these models not only have low energy losses and low air outlet temperatures but are also energy efficient and compact.

They employ two-stage compression with external water jacket inter-cooling, a unique eta-V profile rotor enabling high swept volume, low operating noise and low vibration achieved by combining radial roller bearings and 4-point axially loaded ball bearings. Innovative features like carbon impregnated SS air seals, helical grooved non-contact bronze oil seals and high-performance Visco-seals at suction and discharge rotor ends, an ingenious process of PTFE and PFA (Teflon) dry lubricant coating on carbon steel rotors, an efficient helix-angled timing gear and robustly designed cupro-nickel intercooler and after cooler, heat exchangers offering superior corrosion resistance and finally optimally designed capacity control valves; all ensure not just high efficiency but safety, durability, easy maintenance and low operating cost.

Compression is also very efficient on account of the precise clearances maintained between the helical rotors and the compression chamber, thanks to the unique eta-V profiles designed by ELGi. This rotor design reduces pressure losses and increases stage efficiencies, leading to an overall increase in adiabatic efficiency.

ELGi builds its own rotor milling machines to ensure quality rotors with lowest manufacturing cost.

Only a handful of companies in the world have this design capability. It is to be noted however, that though the machine is termed an oil-free screw compressor, it applies to only the screw chamber that forms the air compression cavity. Oil is nevertheless used in the machine – to lubricate a slew of components like the capacity control valves, air-end bearings, the timing gears and the air-end stage gear. So even though the rotors and the screw chamber do not use any lubricating oil, there is nevertheless an oil circuit comprising the oil pump, cooler, filter and oil sump. Similarly, there is also a water circuit that supplies cooling water to the intercooler, after cooler, and the 1st and 2nd stage air-ends. For ELGi, this development has been a rewarding experience. Industry watchers have it that globally, ELGi is one of only 5 corporate companies to design and manufacture oil-free air-ends.

[elgiindia]

Explore ELGi's oil-free air compressors, delivering 100% class 0 air compressors with enhanced energy efficiency and long-term reliability. Ensure critical air quality for your end-products and processes.

[asequipments]

Oil Lubricated Screw Air Compressors

We have partnered with equipment manufacturers that provide best-in-class energy efficiency and durability to ensure you get the lowest total cost of ownership for your compressed air system. 

ELGi rotary screw air compressors provide best-in-class energy efficiency and reliability. Backed with an Uptime Guarantee, you can rest assured that your compressed air utility will keep your production running smoothly. ELGi rotary screw air compressors offer both lubricated and oil free option, as well as, integrated VFD controls to maximize efficiency and meet any air quality standard needed.

Related Products:

EN SERIES ROTARY SCREW AIR COMPRESSORS 3–50 HP

EG SERIES SCREW COMPRESSORS 15–100 HP

EG SERIES SCREW COMPRESSORS 250–300 HP