Description

The EMAX Silent Air Industrial Plus ESP07V080V3PK-208 is a complete shop air system: a 7.5 HP two-stage 80-gallon vertical air compressor matched to a 30 CFM refrigerated air dryer and shipped as one package. It runs on 208–230V three-phase power, delivers 31 CFM (26 CFM at its 175 PSI maximum), and is built around a 100% cast iron, pressure-lubricated pump with an estimated 70,000-hour service life.

Two problems decide whether a reciprocating compressor is worth living with in a working shop: how loud it is, and how much water ends up in the air. This package addresses both. The patented Silent Air silencer pulls intake noise down to at or below conversational volume, and the included refrigerated dryer removes moisture from the compressed air before it reaches your tools, air lines, or paint work.

Silent Air™ noise suppression

Intake is the single loudest source of sound on a piston compressor. The Silent Air system targets it directly with noise-reducing baffle plates and high-capacity filter media, for operation up to 50% quieter than a comparable open compressor — and because each 10 dBA drop is heard as roughly half the loudness, that difference is dramatic at the bench. Unlike a fully enclosed sound cabinet, the silencer leaves the pump completely accessible for routine service.

Features

Pressure-lubricated pump

A gear-driven oil pump mounted to the rear of the crankshaft generates positive oil pressure, delivering a continuous flow of oil to every bearing point rather than relying on splash. The crankshaft and connecting rods are rifle-drilled so oil travels straight to the wear points — bearings, wrist pins, and the upper connecting-rod assembly — keeping them cool and extending pump life. A spin-on automotive-style oil filter keeps that oil clean, an adjustable regulator sets oil pressure across the RPM range, a bleeder valve makes priming quick, and a liquid-filled oil pressure gauge lets the operator monitor pressure at a glance.

100% cast iron pump

Every major component of the pump is cast iron — crankcase, cylinder heads, cylinders, connecting rods, crankshaft, and high-pressure piston. Where many compressors in this class use aluminum (or cast iron over aluminum sleeves), cast iron handles high duty-cycle compression without the rigidity and head-gasket problems aluminum is prone to under sustained heat.

Cast iron cylinders

The cylinders are CNC-machined for flatness and precise bore tolerances, with deep cooling fins that maximize surface area for cooling under high-duty-cycle operation. Precision honing promotes easier break-in, reduced oil carryover, and longer piston-ring life, and deep-bored threaded holes allow proper head torque for long-term gasket durability.

Solid cast iron cylinder heads

The heads are solid cast iron, not aluminum, avoiding the head-gasket failures aluminum heads are known for. The disc-valve design seals the head gasket securely without retorquing, and tapped holes in cast iron hold torque far better than aluminum under demanding conditions.

Cast iron pistons and rebuildable connecting rods

The high-pressure pistons are cast iron, sized to withstand heavy loads and resist the cylinder scoring that ends a pump's life. Connecting rods are CNC-machined solid cast iron for maximum rigidity, with replaceable bearing inserts and wrist pins so the rod assembly is fully rebuildable rather than throw-away. A four-ring piston design — two oil-control rings and two compression rings, engineered to overlap — maximizes sealing and minimizes oil carryover. On this two-stage pump the low-pressure pistons are aluminum, where they run under low stress (around 45 PSI) and benefit from the lighter weight.

Cast iron flywheel and belt drive

The 7.5 HP pump turns a 20-inch cast iron flywheel with two B-style V-belts and nine large cooling fins. The flywheel's mass stores kinetic energy that lowers amp draw, the multi-belt drive spreads load over more contact area to extend belt life, and the fins pull cooling air across the pump. A dual-bolt belt tensioner sets and holds belt tension precisely, so adjustments no longer call for prying on the motor.

CNC-machined disc valves

The pump uses CNC-machined concentric-ring (disc) valves, surface-ground for sealing and durability. They outlast the feather or reed valves common at this price and service in minutes — pull the retainer, lift the valve to inspect, and reinstall.

Continuous-run head unloader

This unit is configured for continuous-run duty. The head unloader works with the pilot valve to hold the intake valve open at preset pressure, letting the motor keep running instead of repeatedly starting under load. That circulates cool air through the cylinder, cuts amp draw while unloaded, and reduces wear on the motor and magnetic starter — the behavior you want on any compressor running a 40% or higher duty cycle.

Pump riser and isolator pads

A pump-mount riser raises the pump for 360-degree airflow off the flywheel, cooling the oil reservoir and the underside of the pump. Vibration-isolator pads come in the package to settle the unit on the floor.

Electric auto drain

A dual-timer electric auto drain expels condensate from the tank on a schedule you set, with adjustable drain cycles from 1 to 45 minutes and adjustable open time. An included muffler keeps the discharge quiet.

What's Included

• 7.5 HP two-stage cast iron air compressor on an 80-gallon vertical ASME tank
• 30 CFM refrigerated air dryer with built-in 0.001-micron prefilter and 0.005-micron coalescing prefilter
• Pressure-lubrication oil pump with spin-on filter and liquid-filled gauge
• Magnetic starter
• Dual-bolt belt tensioner
• Pump-mount riser
• Dual-timer electric auto drain with muffler
• Vibration-isolator pads

The compressor and dryer ship together as one complete air system, so the air reaching your tools is already dried — no separate dryer to source and size.

Specifications

Warranty

The compressor carries a 1-year standard warranty covering defects in material, workmanship, and parts, including one year of labor from an authorized technician. Registering for the extended plan and running EMAX SMART OIL™ on the routine maintenance schedule extends that coverage to a full 5 years, and enrolling in the SMART OIL™ auto-ship program adds a Limited Lifetime warranty on the pressure-lubricated pump (non-prorated, no hour limit) with all other non-wear components covered to 5 years.

The refrigerated air dryer carries its own 1-year standard warranty, extendable to 3 years with registration and one Airbase dryer filter-replacement kit per year. Warranty registration is done at emaxwarranty.com; the unit ships with break-in oil that must be changed by 70 hours of run time to keep coverage valid.

FAQ

Is the air dryer included, or is it a separate purchase?

It is included. This is a packaged air system — the 7.5 HP compressor and the 30 CFM refrigerated dryer ship together and are sized to match, so the air leaving the dryer is already moisture-free.

What electrical service does it need?

208–230V three-phase power. The motor draws 20.47 full-load amps at a 1.15 service factor, with 132 locked-rotor amps, and EMAX specifies a 40-amp breaker. A magnetic starter is included.

Can it run continuously?

Yes. The unit is configured for continuous-run duty with a head unloader, which holds the intake valve open at pressure so the motor keeps running rather than cycling on and off — the right setup for duty cycles of 40% or higher.

How long should the pump last?

EMAX rates the pressure-lubricated cast iron pump at an estimated 70,000 hours. Pressure lubrication and the rifle-drilled crankshaft and rods keep oil flowing to the bearings under sustained load, which is what drives that figure.

What certifications does it carry?

The unit is listed to ETL, the tank is ASME-coded, and it carries a CRN (Canadian Registration Number) for the pressure vessel.

What maintenance keeps the warranty valid?

Change the factory break-in oil by 70 hours of run time, then change oil every 6 months or 1,000 hours. The 5-year and Limited Lifetime pump coverage require registering and using EMAX SMART OIL™ on the auto-ship schedule; the service kit EFKIT008AWBS bundles the oil and filters for that schedule.

This package ships by freight on a solid oak pallet. To arrange delivery or ask about your shop's power and placement before ordering, email sales@mygaragesupplies.com or call 307-381-1810.

Documents

• Piston Compressor Owner's Manual
• Refrigerated Air Dryer Manual
• Compressor & Pump Warranty
• Air Dryer Warranty