EMAX Silent Air Industrial Plus 5 HP 80-Gallon Two-Stage Air Compressor with 30 CFM Refrigerated Dryer, 230V Single-Phase, ESP05V080I1PK

The EMAX Industrial Plus ESP05V080I1PK pairs a 5 HP, 80-gallon two-stage air compressor with a 30 CFM refrigerated air dryer as a complete packaged air system — compressed air and moisture removal in one purchase. The two-stage, pressure-lubricated pump delivers 19 CFM with a 175 PSI maximum, and runs on 230V single-phase power, so it installs in shops without three-phase service.

The patented Silent Air system targets intake noise — the loudest source of compressor sound — with noise-reducing baffle plates and high-capacity filter media, for operation up to 50% quieter, at or below conversational volume. Unlike enclosed cabinet designs, the silencer doesn't restrict service access to the pump.

This is a continuous-run unit with a 60% duty cycle rating and an estimated pump life of 70,000 hours. The unit carries ETL, ASME, and CRN certifications, and the standard warranty extends to 5 years with registration and the EMAX maintenance plan (see Warranty below). Electrical planning is straightforward: 26.45 full-load amps with the 1.15 service factor, and a 40-amp recommended breaker.

This unit ships via freight. For delivery scheduling or a freight quote, contact sales@mygaragesupplies.com or call 307-381-1810.

Silent Air Technology

The intake filtration system uses noise-reducing baffle plates and high-capacity filter media — up to 1000% more filtration than standard setups. Quieter intake without an enclosed cabinet means routine service stays easy.

Pressure-Lubricated Pump

A gear-driven oil pump mounted to the rear of the crankshaft generates positive oil pressure, feeding the crankshaft bearings and upper connecting rod assembly through rifle-drilled oil passages. A spin-on automotive-style oil filter keeps the oil clean, a liquid-filled gauge gives accurate oil-pressure readings, an adjustable regulator sets pressure across RPM ranges, and a bleeder valve makes priming quick. Pressure lubrication delivers oil precisely where splash-lubricated systems can't — the most effective method for high-duty-cycle, continuous-run operation.

100% Cast Iron Pump

All major pump components are cast iron — crankcase, cylinder heads, cylinders, connecting rods, crankshaft, and high-pressure piston. Cast iron handles high-duty-cycle compression without the durability compromises of aluminum components, and there are no aluminum sleeves beneath the paint.

Pistons and Connecting Rods

The high-pressure pistons are cast iron, built to withstand heavy loads without cylinder scoring. Connecting rods are CNC-machined solid cast iron with replaceable bearing inserts and wrist pins — the rod assembly is fully rebuildable, not throw-away. Low-pressure pistons are aluminum by design, since they operate under low stress (about 45 PSI) where lighter weight aids balance and efficiency. A four-ring piston design with overlapping rings — two oil-control, two compression — minimizes compression loss and oil carryover.

CNC-Machined Disc Valves

Precision surface-ground concentric ring (disc) valves seal better and last longer than feather or reed valve designs. Service takes minutes: remove the retainer, lift out the valve, inspect, and reinstall. All valves support the automatic head unloader system — on this fully packaged electric unit, the head unloader works with the pilot valve to unload the compressor at preset pressure, letting cool air circulate through the cylinder while the motor keeps running instead of repeatedly starting under load. Under high-duty-cycle use (over 40%), the connected ball valve can be opened for continuous-run operation, cutting amp draw by up to 60% while unloaded.

Cast Iron Cylinder Heads

Solid cast iron heads with tapped holes hold torque and rigidity under demanding conditions, and the disc valve design keeps the head gasket sealed without retorquing. Aluminum heads — prone to head gasket failures and typically fitted with reed valves — are deliberately not used.

Cylinder Construction

Cylinders are CNC-machined cast iron with precision-honed bores for concentricity, easier break-in, reduced oil carryover, and longer ring life. Deep cooling fins maximize surface area for cylinder cooling, and deep-bored, threaded head-bolt holes allow proper torque for long-term gasket durability.

Heavy-Duty Cast Iron Flywheel

The 5 HP pump runs a 16" cast iron flywheel with two B-style groove belts and six large cooling fins. The flywheel's mass generates greater kinetic energy, reducing amp draw and energy consumption, while the multi-belt contact area extends belt life and the fins add pump cooling capacity.

Multi-Belt V-Drive and Dual-Bolt Tensioner

A multi-belt drive with B-width belts provides more grip surface, lower belt tension, and less strain on motor and pump bearings than narrow single-belt designs — with lower noise and vibration. The dual-bolt belt tensioner keeps alignment true and makes belt adjustment precise, with no pry bars required.

Pump Riser

The pump mounting plate riser elevates the pump for 360-degree airflow from the flywheel across the oil reservoir and under the pump for maximum cooling.

Electric Auto Drain

A dual-timer electric auto drain expels moisture from the tank automatically, with adjustable drain cycles from 1 to 45 minutes and adjustable open duration. An air muffler is included for quiet water dispensing.

30 CFM Refrigerated Air Dryer

The included EMAX refrigerated air dryer removes moisture from your compressed air before it reaches your tools, with a built-in 0.001-micron prefilter and a coalescing prefilter at 0.005 micron. Compressor and dryer arrive as a complete, matched air system.

• EMAX Industrial Plus 5 HP 80-gallon two-stage vertical air compressor (ESP05V080I1PK)
• EMAX 30 CFM refrigerated air dryer with built-in prefilters
• Pressure-lubricated pump with spin-on oil filter and oil pressure gauge
• Continuous-run head unloader with pilot valve and ball valve
• Dual-timer electric auto drain with muffler
• Dual-bolt belt tensioner
• Isolator pads

The compressor carries a 1-year standard warranty against defects in material, workmanship, and parts from the date of delivery, including 1 year of warranty labor from an authorized technician. Register your compressor at the EMAX warranty site to activate coverage and view extension options.

The standard warranty extends to a full 5 years when you register for the extended warranty plan, use EMAX SMART OIL, and follow the routine maintenance schedule: change the break-in oil within the first 70 hours, then change oil every 6 months or 1,000 hours, whichever comes first. The EMAX 5-Year Extended Warranty Kit (EFKIT008AWBS) — sold separately — covers 5–10 HP Silent Air electric models like this one and includes the SMART OIL, spin-on oil filter, and Silent Air filter elements the plan requires.

The refrigerated air dryer carries its own 1-year standard warranty with 1 year of warranty labor, extendable to 3 years by registering for the extended plan, purchasing one Airbase dryer filter replacement kit per year, and following the routine maintenance schedule. Standard technical assistance is provided at no charge during and after the warranty period on both units.

How quiet is it?

The patented Silent Air system reduces intake noise — the loudest source of compressor sound — for operation up to 50% quieter, at or below conversational volume. Each 10 dBA drop reads as a 50% reduction to the human ear.

What electrical service does it need?

230V (+/- 10%) single-phase, with a 40-amp recommended breaker. Full-load draw is 26.45 amps with the 1.15 service factor; peak starting draw is 135 amps. A magnetic starter is not included.

Can it run continuously?

Yes. The unit is rated for a 60% duty cycle, and the head unloader with pilot valve unloads the pump at preset pressure so the motor keeps running instead of cycling. For applications over 40% duty cycle, open the connected ball valve for continuous-run operation.

How does the auto drain work?

A dual-timer electric drain expels tank moisture automatically. Set the drain interval anywhere from 1 to 45 minutes and adjust how long the drain stays open; an included muffler quiets the discharge.

What maintenance keeps the warranty valid?

Change the shipped break-in oil within the first 70 hours, then change oil every 6 months or 1,000 hours (whichever comes first) using EMAX-approved oil, and maintain proper oil level. The extended 5-year plan requires registration and EMAX SMART OIL.

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