EMAX 7.5 HP 120-Gallon Rotary Screw Air Compressor ERVK070003-460

The EMAX 7.5 HP rotary screw air compressor is a continuous-duty compressed air system built for shops that need reliable airflow through long work cycles. Delivering 29 CFM at 100 PSI and up to 145 PSI maximum pressure, it combines an oil-injected rotary screw air end, a 120-gallon horizontal receiver tank, and an integrated 30 CFM refrigerated air dryer into one factory-mounted package. The 100% duty-cycle rotary screw design eliminates the cool-down periods common with piston compressors, making it suited for demanding applications. Note: requires 460V three-phase power on a dedicated circuit.

The single-stage rotary screw air end uses a male-and-female rotor design with an estimated 100,000-hour service life and transfers power through a two-belt V-drive that reduces belt tension, vibration, and operating noise to approximately 62 dB(A). The integrated refrigerated dryer removes moisture before air reaches your tools and equipment, while the dual-timer automatic drain clears condensate on a programmable schedule. A swing-arm dryer mount improves service access by allowing the dryer to move away from the compressor cabinet.

Designed for automotive shops, fabrication facilities, production environments, and light-industrial operations that rely on compressed air for plasma cutters, sandblasters, air tools, and manufacturing equipment. The onboard digital controller provides pressure and temperature monitoring, maintenance alerts, and emergency-stop controls, while the TEFC motor and VSD-ready design provide flexibility for future system upgrades.

Features

• 100% Duty-Cycle Rotary Screw Air End — Oil-injected, single-stage rotary screw design engineered for continuous operation, delivering steady airflow without cool-down cycles.
• Two-Belt V-Belt Drive — Uses wider B- and C-width belts to distribute load across a larger surface area, reducing belt tension, noise, and vibration. The 7.5 HP model operates at approximately 62 dB(A) for quieter shop performance.
• Integrated 30 CFM Refrigerated Air Dryer — Matched to the compressor’s 29 CFM output to remove moisture from the full compressed-air stream before it reaches tools, equipment, and air lines.
• Onboard Digital Control Panel — Displays operating pressure and temperature while providing start/stop controls, an emergency-stop button, and six automatic maintenance notifications for easier service management.
• Swing-Arm Dryer Mount — Allows the dryer to pivot away from the compressor cabinet, improving access to filters, belts, and the rotary screw air end during maintenance.
• Automatic Tank Drain — Dual-timer electric drain automatically removes condensate with adjustable 1-to-45-minute cycles and includes an air muffler for quieter discharge.
• TEFC, VSD-Ready Motor — Totally enclosed fan-cooled motor protects components in dusty environments. The VSD-compatible motor and cabinet allow future conversion to variable-speed operation.

Specifications

Warranty

EMAX backs the compressor with a 1-year standard warranty covering the rotary screw pump and all components, including the electric motor, against defects in materials and workmanship from the date of delivery. The warranty also includes one year of labor through an authorized technician. The integrated refrigerated air dryer carries its own 1-year standard warranty covering parts, workmanship, and labor.

Both compressor and dryer coverage can be extended through EMAX’s scheduled-maintenance program. By following the required maintenance schedule and using EMAX SMART OIL™ and genuine filters, compressor coverage extends up to 10 years on the rotary screw pump and three-phase motor, with remaining components covered for up to 5 years. The refrigerated dryer coverage extends to 3 years. Extended and lifetime warranty coverage requires staying current with all maintenance requirements. Full terms and conditions are provided in the warranty documents below.

FAQ

What electrical service does this compressor need?
The compressor runs on 460V three-phase power and draws 10.4 full-load amps with a 1.15 service factor, with a locked-rotor draw of 66.2 amps. Installation requires a dedicated circuit with breaker and wiring sized according to the motor nameplate and local electrical codes by a licensed electrician. Confirm that your facility has 460V three-phase service before ordering.

Can this compressor run as a variable-speed unit?
The unit ships as a fixed-speed compressor with Wye-Delta starting. The motor and control cabinet are VSD-ready, allowing a variable-speed drive conversion through EMAX for applications with fluctuating air demand.

Can it run continuously, or does it need to cool down?
The oil-injected rotary screw air end is rated for 100% duty-cycle operation, allowing continuous operation without the cool-down periods required by piston compressors.

Does it include an air dryer?
Yes. The package includes an integrated 30 CFM refrigerated air dryer matched to the compressor’s 29 CFM output, removing moisture from the compressed air before it reaches your air lines and equipment.

How does the tank drain work?
The dual-timer electric automatic drain removes condensate from the receiver tank on an adjustable cycle from 1 to 45 minutes. An included air muffler reduces discharge noise during operation.

Documents

• Rotary Screw Compressor User Manual (PDF)
• Refrigerated Air Dryer Instructions Manual (PDF)
• Rotary Screw Compressor Warranty (PDF)
• Refrigerated Air Dryer Warranty (PDF)