EMAX 7.5 HP 120-Gallon Rotary Screw Air Compressor — 460V 3-Phase, 29 CFM, Single-Stage, with 30 CFM Refrigerated Dryer & Swing-Arm Mount (ERVK070003-460)

The EMAX 7.5 HP rotary screw air compressor delivers 29 CFM at 100 PSI and up to 145 PSI maximum on 460V three-phase power, with an integrated 30 CFM refrigerated air dryer sized to match the compressor's full output. It is built for shops and light-industrial operations that run air tools, plasma cutters, sandblasters, or production equipment long enough that a piston compressor would overheat — the oil-injected rotary screw air end is rated for 100% duty cycle, so it can run continuously without a forced cool-down period.

Highlights

• 100% duty-cycle rotary screw air end — oil-injected single-stage design runs continuously without cool-down cycles.
• Two-belt V-belt drive — B- and C-width belts lower tension and reduce noise and vibration, with the 7.5 HP unit running at about 62 dB(A).
• Integrated 30 CFM refrigerated dryer — matched to the compressor's 29 CFM output to dry the full air stream.
• Onboard digital control panel — shows operating pressure and temperature, with start/stop and emergency-stop controls and six automatic maintenance notifications.
• Swing-arm dryer mount — the dryer hinges away from the cabinet for service access to filters, belts, and the air end.
• Automatic tank drain — dual-timer electric drain with adjustable 1-to-45-minute intervals and an air muffler for quiet discharge.
• TEFC, VSD-ready motor — totally enclosed and fan-cooled for dusty shops, with a VSD-compliant motor and cabinet for an optional variable-speed conversion.

What's in the box

• 7.5 HP single-stage, oil-injected rotary screw air compressor
• Integrated 30 CFM refrigerated air dryer
• 120-gallon matte-black horizontal receiver tank
• Swing-arm dryer mount
• Dual-timer electric automatic tank drain with air muffler
• Braided hydraulic hoses

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, with one year of labor through an authorized technician. The integrated refrigerated dryer carries its own 1-year standard warranty on parts, workmanship, and labor.

Both can be extended. Enrolling in EMAX's scheduled-maintenance program — changing oil and filters on the published schedule using EMAX SMART OIL — extends the compressor to up to 10 years on the rotary screw pump and the three-phase motor and 5 years on the remaining components, and extends the dryer to 3 years. Extended and lifetime coverage require staying current on the maintenance schedule. Full terms are in the warranty documents below.

FAQ

What electrical service does this compressor need?

It runs on 460V three-phase power and draws 10.4 full-load amps, including a 1.15 service factor, with a locked-rotor draw of 66.2 amps. Run it on a dedicated circuit, with breaker and wire sized to the motor nameplate and your local electrical code by a licensed electrician. Confirm your shop has 460V three-phase service before ordering.

Can this compressor run as a variable-speed unit?

It ships as a fixed-speed unit with a Wye-Delta start. The motor and cabinet are VSD-ready, so a variable-speed drive can be added later through EMAX if your air demand varies widely.

Can it run continuously, or does it need to cool down?

The oil-injected rotary screw air end is rated for 100% duty cycle, so it can run continuously without the cool-down cycles a piston compressor needs.

Does it include an air dryer?

Yes. A 30 CFM refrigerated air dryer is integrated into the package and matched to the compressor's 29 CFM output, so it dries the full air stream before it reaches your lines.

How does the tank drain work?

A dual-timer electric automatic drain expels condensate from the receiver tank on an interval you set, anywhere from 1 to 45 minutes, and includes a muffler for quiet discharge.

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