ELGi EN15 Rotary Screw Air Compressor - 20 HP | Tank-Mounted with Refrigerated Dryer

Complete Compressed Air System with Industrial Performance, Integrated Air Treatment, and a 120-Gallon Receiver Tank

The ELGi EN15 20 HP Rotary Screw Air Compressor with Refrigerated Dryer and 120-Gallon Tank provides a complete compressed air solution in one compact, professionally integrated package. Designed for manufacturing facilities, automotive shops, fabrication operations, CNC machining, woodworking, and other industrial applications, this system combines reliable air production, compressed air storage, and moisture removal on a single horizontal receiver tank.

Depending on the selected operating pressure, the EN15 delivers up to 81.5 CFM, providing the airflow required for demanding shop and production equipment. The integrated refrigerated dryer helps reduce moisture in the compressed air system, while the 120-gallon receiver tank provides additional storage capacity and helps stabilize system pressure during changing air demands.

At the center of the EN15 is ELGi’s proprietary encapsulated airend. This integrated design combines many of the compressor’s major components into a common assembly, reducing external connections that can contribute to air leaks, pressure loss, and maintenance problems. The result is a compact rotary screw compressor engineered for dependable operation, energy efficiency, and easier routine service.

Key Features & Benefits

Complete Tank-Mounted Compressor Package

The EN15 package combines three essential components into one system:

• 20 HP ELGi rotary screw air compressor
• Refrigerated compressed air dryer
• 120-gallon horizontal air receiver tank

This integrated arrangement reduces installation complexity and provides a clean, organized compressed air package without requiring the compressor, dryer, and tank to be mounted separately.

Up to 81.5 CFM of Compressed Air

The EN15 is available in multiple operating-pressure configurations, allowing the compressor to be matched to the pressure requirements of your equipment.

• 81.5 CFM at 100 PSI
• 68.0 CFM at 125 PSI
• 61.5 CFM at 150 PSI

Choosing the correct pressure configuration is important. Operating at a higher pressure than required reduces available airflow and can increase energy consumption.

Integrated Refrigerated Air Dryer

Moisture is one of the most common problems in a compressed air system. The included refrigerated dryer helps remove water vapor from the compressed air before it travels into the facility’s piping system.

Reducing moisture can help protect:

• Air tools
• Pneumatic cylinders
• CNC equipment
• Paint and finishing equipment
• Production machinery
• Compressed air piping
• Downstream filters and regulators

The dryer is mounted directly on the receiver package, creating a compact system with fewer separate components to position and connect.

120-Gallon Horizontal Receiver Tank

The included 120-gallon air receiver provides storage capacity between the compressor and the facility’s compressed air demand.

The receiver tank helps:

• Stabilize system pressure
• Provide reserve air during short periods of increased demand
• Reduce rapid loading and unloading
• Allow additional cooling time for compressed air
• Create a convenient mounting platform for the compressor and dryer

ELGi Encapsulated Airend

ELGi integrates many of the compressor’s major operating components into a common airend assembly. Internal ports and O-ring-sealed flanges reduce the number of external connections, helping minimize compressed air leaks and energy-robbing pressure drops.

Major integrated components include:

• Air filter
• Air intake valve
• Solenoid valve
• Air-oil separator tank
• Oil separator element
• Oil filter
• Safety valve
• Oil sight glass
• Minimum-pressure valve
• Oil drain valve
• Thermostatic valve
• Blowdown valve

This simplified design reduces potential leak points while keeping important service components accessible.

ELGi eta-V Airend Technology

ELGi designs and manufactures its own proprietary airends. The eta-V rotor profile is engineered to deliver efficient compression and dependable industrial performance.

Controlling the design and manufacturing of the airend allows ELGi to optimize the compressor’s major operating components as a complete system rather than assembling the machine around a third-party airend.

Heavy-Duty Belt-Drive System

The EN15 uses a heavy-duty belt-drive system with a premium-efficiency NEMA Super E motor. The motor includes Class F insulation and is designed for demanding industrial operating environments.

The belt-drive arrangement also allows proper belt tension to be maintained during routine service.

Integrated Air-Cooled Aftercooler

An air-cooled aftercooler is included to lower the temperature of the compressed air before it reaches the refrigerated dryer and receiver tank.

Cooling the compressed air helps condense water vapor so it can be more effectively removed from the system. It also reduces the temperature entering downstream air treatment equipment.

Thermo-Zone Cooling Design

ELGi’s Thermo-Zone layout separates the compressor’s hot and cool operating areas. This helps protect electrical and temperature-sensitive components from excessive heat.

The EN15 is designed to operate in ambient temperatures up to 115°F, making it suitable for many demanding industrial environments when properly installed and ventilated.

ELGi Neuron Controller

The electronic Neuron controller provides centralized monitoring and control of the compressor.

Controller functions include:

• Compressor operating status
• Service reminders
• Fault alarms
• Operating-hour indicators
• Safety shutdown protection
• System monitoring
• Compressor start and stop control

The easy-to-read controller helps operators monitor compressor condition and identify service requirements before they become larger problems.

Quiet Rotary Screw Operation

With a rated sound level of approximately 68 dB(A), the EN15 operates significantly quieter than many industrial reciprocating compressors of comparable capacity.

The sound-reducing enclosure can allow the compressor to be installed closer to the production area, provided adequate clearance, ventilation, and service access are maintained.

Efficient Oil Separation

ELGi’s OSBID system, or Oil Separation by Impact and Deceleration, uses a three-stage process to separate oil from the compressed air stream.

The system is designed to provide:

• Oil carryover below 3 ppm
• Minimal internal pressure loss
• Consistent compressed air quality
• Efficient oil recovery
• Reduced energy loss across the separation system

Ideal Applications

The ELGi EN15 tank-mounted compressor and dryer package is well suited for facilities with steady or recurring compressed air demand, including:

• Automotive repair shops
• Collision and body shops
• CNC machining facilities
• Metal fabrication shops
• Woodworking and cabinet shops
• Manufacturing plants
• Packaging operations
• Maintenance departments
• Cutting and machining operations
• Pneumatic production equipment
• General industrial facilities

Actual compressor sizing should be based on the total airflow demand, required operating pressure, duty profile, and expected future expansion of the compressed air system.

Technical Specifications

Standard Features

• ELGi proprietary rotary screw airend
• Premium-efficiency NEMA Super E motor
• Heavy-duty belt-drive system
• Class F motor insulation
• Integrated air-cooled aftercooler
• Refrigerated compressed air dryer
• 120-gallon horizontal receiver tank
• ELGi Neuron electronic controller
• Sound-reducing enclosure
• Thermo-Zone cooling layout
• OSBID oil-separation system
• Air filter
• Oil filter
• Air-oil separator element
• Minimum-pressure valve
• Thermostatic valve
• Blowdown valve
• Safety shutdown protection
• Service and fault indicators
• CAGI performance-verified compressor ratings

Installation Considerations

The compressor should be installed indoors in a clean, dry, and adequately ventilated area. Sufficient clearance should be provided around the package for cooling airflow, electrical access, dryer ventilation, condensate drainage, and routine maintenance.

Before ordering, confirm:

• Required operating pressure
• Voltage and phase
• Available electrical service
• Total facility airflow demand
• Required connection size
• Installation location
• Ventilation requirements
• Condensate drain routing
• Local electrical and mechanical codes

A properly sized electrical disconnect and overcurrent protection should be provided by a qualified electrician.

The refrigerated dryer and receiver tank will produce condensate that must be discharged and handled in accordance with applicable regulations. An oil-water separator may be required before condensate is discharged into a sanitary drain.

Routine Maintenance

Routine maintenance is essential for protecting compressor performance and warranty coverage.

Typical service items include:

• Compressor oil
• Oil filter
• Air intake filter
• Air-oil separator element
• Drive belts
• Cooler cleaning
• Condensate drains
• Refrigerated dryer condenser
• Electrical connections
• Safety devices

Maintenance intervals should follow the current ELGi service schedule and may need to be shortened in hot, dusty, or demanding operating environments.

Industry-Leading ELGi Warranty Coverage

• 6-Year Airend Warranty
• 5-Year Warranty on Other Key Components

Warranty coverage is subject to ELGi’s current terms, conditions, registration requirements, and required maintenance procedures.

Frequently Asked Questions

How much air does the ELGi EN15 produce?

Airflow depends on the selected operating pressure:

• 81.5 CFM at 100 PSI
• 68.0 CFM at 125 PSI
• 61.5 CFM at 150 PSI

The compressor should be selected according to the highest pressure actually required by the equipment.

Does this package include an air dryer?

Yes. This configuration includes a tank-mounted refrigerated air dryer.

What size tank is included?

The package includes a 120-gallon horizontal air receiver tank.

Is the EN15 available in different voltages?

Yes. Electrical configurations vary. The voltage and phase must be confirmed before ordering to ensure compatibility with the facility’s electrical service.

How loud is the ELGi EN15?

The EN15 has a rated sound level of approximately 68 dB(A) under the manufacturer’s specified test conditions.

Can this compressor be installed directly in the shop?

It may be installed near the production area when adequate ventilation, service clearance, electrical protection, and environmental conditions are provided. It should not be placed in an enclosed room without sufficient cooling airflow.

Is additional filtration recommended?

The refrigerated dryer helps reduce moisture, but additional particulate, coalescing, or activated-carbon filtration may be required depending on the application and required air quality.

Will this compressor operate air tools and production equipment?

The EN15 can support many industrial tools and machines, but proper sizing must be based on the combined CFM demand of all equipment that may operate at the same time.

Why Buy the ELGi EN15 from Compressed Air Advisors Online?

Compressed Air Advisors Online specializes in helping businesses properly select complete compressed air systems. We evaluate airflow, pressure, voltage, air treatment, storage, and application requirements so you receive equipment that fits the way your facility actually operates.

When you purchase from Compressed Air Advisors Online, you receive:

• Expert compressed air system guidance
• Nationwide shipping
• Assistance selecting the correct pressure configuration
• Help confirming voltage and phase
• Complete compressor and air-treatment recommendations
• Access to replacement filters, lubricants, and maintenance parts
• Support from a company focused exclusively on compressed air equipment