EMAX 7.5 HP 120-Gallon Two-Stage Air Compressor ESP07V120V3PK-460

The EMAX ESP07V120V3PK-460 combines a 7.5 HP two-stage Silent Air compressor with a 58 CFM refrigerated air dryer to deliver clean, dry compressed air from one complete shop package. Running on 460V three-phase power, the compressor produces 31 CFM and stores air in a 120-gallon ASME-certified vertical tank, while the oversized dryer removes moisture, oil, and contaminants before they reach your tools and air lines. The system is built for demanding environments with a 100% cast iron, pressure-lubricated pump, an estimated 70,000-hour pump life, and ETL, ASME, and CRN certifications.

The patented Silent Air™ noise suppression system reduces intake noise — the loudest source of compressor sound — with noise-reducing baffle plates and high-capacity filter media for operation up to 50% quieter while keeping the pump fully accessible for maintenance. The pressure-lubricated pump uses a gear-driven oil system that sends filtered oil directly to bearings and wear points through rifle-drilled crankshaft and connecting rod passages. Combined with cast iron cylinders, rebuildable connecting rods, four-ring pistons, and precision-machined disc valves, the design is made for long service intervals and continuous-duty shop use.

The included 58 CFM refrigerated air dryer provides more capacity than the compressor’s 31 CFM output, ensuring the full airflow is cooled, dried, and filtered before reaching your equipment. This package is ideal for automotive repair facilities, fabrication shops, industrial service operations, and professional garages that need reliable airflow, lower operating noise, and clean compressed air for tools, paint, and production applications.

Features

Pressure-Lubricated Cast Iron Pump

A rear-mounted, automotive-style gear oil pump generates positive oil pressure and continuously feeds every bearing point, helping keep components cool and extending pump life. The crankshaft and connecting rods are rifle-drilled to deliver oil directly to high-friction wear areas, while a spin-on automotive-style oil filter keeps the lubricant clean between service intervals. A liquid-filled oil pressure gauge allows easy monitoring, a bleeder valve enables quick priming, and an adjustable pressure regulator allows precise oil-pressure control across the RPM range.

100% Cast Iron Construction

All major pump components are constructed from cast iron — including the crankcase, cylinder heads, cylinders, connecting rods, crankshaft, and high-pressure piston. Unlike aluminum designs that can flex under heavy loads, cast iron maintains rigidity, dimensional stability, and heat resistance during high-duty-cycle compression.

Cast Iron Cylinders and Cylinder Heads

The CNC-machined cast iron cylinders are engineered for flatness and precise bore concentricity, with deep cooling fins and precision-honed surfaces that reduce oil carryover and support longer piston-ring life. Solid cast iron cylinder heads feature deep-bored, threaded holes for stronger bolt retention and consistent torque, maintaining a reliable head-gasket seal without frequent retorquing.

Pistons, Connecting Rods, and Four-Ring Sealing

The cast iron high-pressure pistons are built to withstand heavy loads while resisting cylinder scoring. CNC-machined solid cast iron connecting rods provide strength where stress is highest, especially at the crankshaft end, and replaceable bearing inserts and wrist pins allow the rod assembly to be rebuilt rather than replaced.

The four-ring piston design uses two oil-control rings to remove excess oil during the downstroke and two compression rings to improve sealing and reduce blow-by. This design minimizes oil carryover and extends piston-ring service life. On two-stage pumps, the low-pressure piston uses aluminum construction because it operates under lower stress conditions.

CNC-Machined Disc Valves

Precision CNC-machined concentric-ring disc valves are surface-ground for improved sealing, durability, and serviceability. Inspection and replacement are simple: remove the retainer, lift out the valve, inspect, and reinstall.

The valve system is designed to support automatic head unloaders, which are recommended for electric compressors operating at 40% duty cycle or higher. Head unloaders reduce repeated loaded starts, lower mechanical and electrical stress, improve efficiency, and help protect the motor and magnetic starter.

Cast Iron Flywheel and Belt Drive

The 7.5 HP unit uses a 20-inch cast iron flywheel with two B-groove belts and nine integrated cooling fins. The flywheel’s additional mass stores kinetic energy to reduce amp draw and smooth operation, while the wider belt contact surface improves belt life and reduces strain on the drive system. The cooling fins direct airflow across the pump for improved temperature control.

A dual-bolt belt tensioner maintains accurate belt alignment and tension without the need for pry bars, simplifying maintenance and extending belt service life.

Pump Riser, Isolator Pads, and Continuous-Run Capability

A pump mounting-plate riser elevates the pump to allow 360-degree airflow from the flywheel across the oil reservoir and beneath the pump for improved cooling. Vibration isolator pads, a TEFC motor, and a magnetic starter complete a package designed for demanding shop environments.

The system is rated for a 60% duty cycle and supports continuous-run operation when properly configured.

Automatic Drain and Refrigerated Air Dryer

A dual-timer electric automatic drain removes moisture from the receiver tank on an adjustable 1-to-45-minute cycle, with adjustable open duration and an included air muffler for quieter discharge.

The matched 58 CFM refrigerated air dryer removes moisture from compressed air by cooling the air stream and separating condensed water. A built-in coalescing filter removes oil and particulate contamination before air reaches downstream equipment, while the automatic drain trap helps maintain clean, dry air. The dryer uses R134A refrigerant and is rated for inlet air temperatures up to 140°F and ambient temperatures up to 122°F.

Specifications

Warranty

The compressor includes a 1-year standard warranty covering defects in materials, workmanship, and parts, along with one year of labor from an authorized technician. Coverage can be extended to 5 years, including a limited lifetime warranty on the pressure-lubricated pump, when the unit is registered in EMAX’s SMART OIL maintenance program and all required oil and filter service intervals are followed.

The included refrigerated air dryer carries its own 1-year standard warranty with one year of authorized labor. Dryer coverage can be extended to 3 years with registration, annual dryer filter kit replacement, and completion of the required maintenance schedule.

All units ship with factory break-in oil, which must be replaced within the first 70 hours of operation. Warranty coverage is non-transferable; refer to the official warranty documents for complete terms, conditions, and exclusions.

FAQ

What electrical service does this compressor need?

• The compressor requires 460V three-phase power.
• EMAX recommends a 20-amp breaker.
• Full-load current is 10.3 amps.
• Locked-rotor (peak starting) current is 66.2 amps.

Is the dryer large enough for this compressor?

• Yes. The included refrigerated air dryer is rated for 58 CFM.
• Since the compressor produces 31 CFM, the dryer has sufficient capacity to handle the full air output with additional margin.

Can it run continuously?

• Yes. The unit is designed for continuous-run applications with a 60% duty cycle rating.
• The valve system is engineered to support an automatic head-unloader system for high-duty-cycle operation, reducing stress during extended use.

How do I qualify for the 5-year warranty and lifetime pump coverage?

• Register the compressor and enroll in EMAX’s SMART OIL maintenance program.
• Use approved EMAX oil and filters according to the published maintenance schedule.
• The standard warranty provides 1-year coverage, while extended coverage requires registration and proper maintenance compliance.

Documents

• Compressor Manual (PDF)
• Refrigerated Dryer Manual (PDF)
• Compressor Warranty (PDF)
• Dryer Warranty (PDF)