EMAX 10 HP 120-Gallon Two-Stage Air Compressor ESP10V120V3PK-460

The EMAX Industrial Plus ESP10V120V3PK-460 is a complete 10 HP compressed air system that combines a two-stage Silent Air piston compressor, 120-gallon vertical receiver tank, and 58 CFM refrigerated air dryer for demanding shop and industrial applications. Operating on 460V three-phase power, it delivers 38 CFM (34 CFM at 175 PSI maximum pressure) through a pressure-lubricated, all-cast-iron pump designed for an estimated 70,000-hour service life. The patented Silent Air system reduces intake noise by up to 50% while keeping the pump accessible for easier maintenance compared with enclosed cabinet designs.

The pressure-lubricated pump uses a gear-driven oil system to continuously deliver lubrication to critical components, including bearings, crankshaft, and connecting rods. Its cast iron construction, CNC-machined cylinders, cast iron high-pressure pistons, and four-ring piston design help reduce wear, improve sealing, and support long-term operation under heavy workloads. The included 58 CFM refrigerated air dryer removes moisture from compressed air before it reaches tools and air lines, while the dual-timer automatic drain clears tank condensate on adjustable cycles.

Built for automotive repair facilities, manufacturing environments, and high-demand professional shops, this compressor package is designed for sustained daily use. The 60% duty cycle with continuous-run capability, cast iron flywheel with dual B-style belts, dual-bolt belt tensioner, pump riser, and cooling-focused design help reduce electrical strain, control operating temperatures, and simplify maintenance over years of service.

Features

Pressure-Lubricated Pump

A rear-mounted, gear-driven oil pump generates positive oil pressure and continuously supplies lubrication to every bearing point, helping keep components cool and extending pump service life. The crankshaft and connecting rods are rifle-drilled to deliver oil directly to high-friction wear areas.

Unlike splash-lubricated systems, pressure lubrication provides precise oil delivery where it is needed most, making it ideal for demanding, high-stress, continuous-duty applications.

Oil pump features:

• Bleeder valve: Allows quick and efficient oil pump priming
• Liquid-filled oil pressure gauge: Provides clear, accurate pressure readings during operation
• Automotive-style gear oil pump: Pressurizes crankshaft bearings and the upper connecting rod assembly
• Adjustable oil pump regulator: Enables precise pressure adjustment across RPM ranges
• Spin-on oil filter: Removes debris and contaminants to extend pump life and simplify maintenance

100% Cast Iron Pump Construction

The pump is built with cast iron throughout all major components, including the crankcase, cylinder heads, cylinders, connecting rods, crankshaft, and high-pressure piston. Cast iron provides the strength and rigidity needed for high-duty-cycle compression, with no hidden aluminum sleeves beneath the finish.

CNC-Machined Cylinders with Deep Cooling Fins

The cylinders are CNC-machined for precise tolerances and flatness, with precision-honed bores that support easier break-in, reduced oil carryover, and extended piston ring life.

Deep cooling fins increase surface area for improved heat dissipation, while deep-bored threaded holes provide secure cylinder head retention and allow proper torque application for long-term gasket reliability.

Solid Cast Iron Cylinder Heads with Tapped Mounting Holes

The solid cast iron cylinder heads are designed for durability under demanding operating conditions and help avoid the gasket issues often associated with aluminum heads.

Tapped mounting holes provide stronger fastener engagement, while the disc valve design maintains a reliable head-gasket seal without requiring frequent retorquing.

Pistons and Connecting Rods

The piston and connecting rod assembly is designed for rebuildability and long service life.

• Cast iron high-pressure pistons: Built to withstand heavy loads and resist cylinder scoring
• CNC-machined solid cast iron connecting rods: Provide maximum rigidity at high-stress crankshaft connection points
• Replaceable bearing inserts and wrist pins: Allow the rod assembly to be rebuilt instead of discarded
• Aluminum low-pressure pistons: Used only in the first compression stage, where operating pressure is approximately 45 PSI, improving balance and efficiency

Four-Ring Piston Design and Rifle-Drilled Connecting Rods

The compressor uses a four-ring piston design with overlapping rings for improved sealing performance. Two oil-control rings remove excess oil during the downstroke, while two compression rings maintain sealing pressure to reduce blow-by.

This design helps minimize compression loss, reduce oil carryover, and extend ring life. Rifle-drilled oil passages deliver continuous lubrication from the crankshaft through the connecting rod to the piston pin and bearing surfaces. Non-oil-absorbent gaskets help reduce oil leakage and maintenance requirements.

CNC-Machined Disc Valves

The compressor uses CNC-machined concentric-ring disc valves that are precision surface-ground for reliable sealing, durability, and extended service life.

Compared with feather or fixed reed valves, disc valves provide improved reliability and easier maintenance. Servicing is simple: remove the retainer, inspect or replace the valve, and reinstall. All valves are designed to support the automatic head unloader system included on fully packaged electric units.

Flywheel and Belt Drive

The heavy-duty cast iron flywheel improves energy efficiency by storing rotational energy, helping reduce amp draw and overall power consumption.

The 10 HP pump uses a 20-inch flywheel with two B-style groove belts and nine large cooling fins to improve heat dissipation. The multi-belt drive uses wider B- and C-width belts instead of narrow single A-width belts, increasing grip surface area while reducing belt tension, bearing strain, noise, and vibration.

Dual-Bolt Belt Tensioner

The dual-bolt belt tensioner allows precise belt alignment and tension adjustment without the need for pry bars. Proper belt setup helps reduce wear and extends belt service life.

Electric Auto Drain

The dual-timer electric auto drain automatically removes moisture and condensate from the air receiver tank. Drain cycles can be adjusted from 1 to 45 minutes, with separate control over how long each drain cycle remains open.

An included air muffler reduces discharge noise during automatic draining.

Pump Riser

The pump mounting plate riser elevates the pump to improve cooling airflow. This design allows 360-degree airflow from the flywheel across the pump oil reservoir while also allowing air movement underneath the pump for improved heat management.

Specifications

Warranty

The compressor includes a 1-year standard warranty covering defects in materials, workmanship, and parts, along with one year of warranty labor performed by an authorized technician.

Customers can extend coverage to 5 years by registering for EMAX’s extended warranty program and following the required maintenance schedule using EMAX SMART OIL.

Standard technical support is available at no additional cost during and after the warranty period.

FAQ

What electrical service does this compressor require?

The compressor requires 460V (±10%) three-phase power. It draws 14.1 amps at full load with a 1.15 service factor, with peak starting (locked rotor) current of 85.4 amps. EMAX recommends a 25-amp breaker for installation.

Can it run continuously?

Yes. The unit is rated for a 60% duty cycle and supports continuous-run operation. For applications above a 40% duty cycle, opening the ball valve on the pilot valve enables continuous-run mode by allowing the head unloader to relieve compression. This lets the motor continue running without repeatedly starting under load.

How quiet is it?

The patented Silent Air system is designed to operate up to 50% quieter than standard compressors, with sound levels at or below conversational volume. Unlike enclosed cabinet systems, it maintains easy access to the pump and components for servicing.

Does it come with an air dryer?

Yes. The package includes a 58 CFM refrigerated air dryer as a complete compressed-air system. The dryer includes a built-in 0.001-micron prefilter and 0.005-micron coalescing prefilter to help remove moisture and improve air quality before it reaches downstream equipment.

What maintenance does it need?

The factory break-in oil should be replaced within the first 70 hours of operation. After that, oil changes are required every 6 months or 1,000 hours, whichever comes first, using approved EMAX oil.

The automotive-style spin-on oil filter simplifies maintenance, and the EFKIT008AWBS service kit includes the routine maintenance components needed for this model. The oil capacity is 2 quarts.

Documents

• Compressor Manual
• Air Dryer Manual
• Compressor Warranty Statement
• Air Dryer Warranty Statement