EMAX ESP05V080I1 5 HP Silent Air | 19 CFM | 230V 1Ph | 80 Gal

19 CFM at 100 PSI | 175 PSI maximum | 80-gallon vertical tank | Single-phase

The EMAX ESP05V080I1 E450 Silent Air is an upgraded industrial two-stage piston compressor for shops that want a more convenient, serviceable compressed-air system. The 5 HP machine produces 19 CFM at 100 PSI and pairs a pressure-lubricated cast-iron pump with the patented Silent Air™ intake silencer.

What sets this model apart is the automatic tank drain, adjustable belt tensioner and pressure-lubricated pump construction. These features make routine service easier and help protect the compressor over time. It is a logical choice for repair shops, fabrication work and general industrial maintenance where air demand is within its published capacity.

Key Features & Benefits

• 5 HP | 19 CFM at 100 PSI: Compare this output against actual tool consumption and required pressure.
• 175 PSI maximum pressure: Supports appropriately regulated shop air systems.
• Pressure-lubricated two-stage cast-iron pump: Oil delivery to critical internal pump components.
• Patented Silent Air™ system: Intake noise reduction with easy maintenance access.
• 80-gallon vertical air receiver: Storage capacity in a smaller floor footprint.
• Automatic receiver drain: Timed moisture removal reduces manual draining.
• Belt tensioner: Simplifies regular drive-belt adjustment.
• Continuous-run controls: Helps manage on/off cycling in appropriate operating conditions.
• Single-phase power: 230V single-phase service; verify circuit sizing and starting requirements prior to installation.

E350 or E450: Which Should You Buy?

Both 5 HP models deliver 19 CFM at 100 PSI in the published EMAX specifications and use pressure-lubricated pumps. The E350 is the simpler option for buyers comfortable with routine manual drainage and belt maintenance. The E450 is the better fit when automatic drainage and a built-in belt tensioner are priorities. If the shop needs materially more airflow, move to a higher-CFM model instead of expecting these convenience features to increase output.

Pressure Lubrication and Long-Term Service

Unlike a splash-lubricated piston pump, which relies on internal dippers throwing oil through the crankcase, the E450 uses a gear-driven oil pump, rifle-drilled crankshaft and connecting rods, automotive-style spin-on oil filter and liquid-filled oil pressure gauge. This delivers oil directly to critical bearings and wear surfaces. Proper lubrication remains dependent on correct oil level, scheduled oil changes and manufacturer-specified service. Its open, belt-driven layout makes access to key components straightforward.

Silent Air™ Noise Suppression

The Silent Air™ system targets sound generated at the compressor air intake using baffle plates and filtration media. EMAX advertises noise reduction of up to 50% for the technology; actual results vary by model and location. Unlike fully enclosed cabinet designs, the system maintains direct access to the compressor's mechanical components.

See EMAX Silent Air™ technology and how the intake system works.

More Reasons the E450 Is Built for Long-Term Service

Cast-iron construction: EMAX specifies cast-iron crankcase, heads, cylinders, crankshaft, connecting rods and high-pressure piston. Its two-stage low-pressure piston uses aluminum to reduce reciprocating mass. Four-ring pistons help control oil carryover and maintain compression.

Serviceable internals: CNC-machined concentric disc valves, replaceable bearing inserts and wrist pins allow inspection and component service rather than treating the pump as a disposable assembly.

Cooling and drive: The 5 HP pump uses a 16-inch flywheel with six cooling fins and two B-section belt grooves. A pump riser improves airflow beneath the crankcase; the dual-bolt tensioner permits accurate belt adjustment without prying against the motor.

Technical Specifications

Sizing and Installation Considerations

• Add up the CFM demand of tools likely to be operating simultaneously.
• Confirm pressure requirements at the point of use, including losses across piping and air treatment.
• Review daily running hours and compressor duty-cycle requirements.
• Verify the motor nameplate, incoming voltage and circuit protection with a qualified electrician.
• Leave appropriate clearance for cooling air, belt service and intake filter replacement.

Complete the Compressed-Air System

Consider a matched refrigerated air dryer to control moisture, in-line filters for equipment protection, and proper maintenance products for the pressure-lubricated pump. Ask about the applicable EMAX warranty-maintenance program before buying an extended coverage kit.

Frequently Asked Questions

What does 19 CFM at 100 PSI mean?

The compressor delivers 19 cubic feet per minute of free air at a discharge pressure of 100 PSI. It can develop up to 175 PSI; airflow at different pressures may vary.

How does this compare with an E350?

The comparable E350 has the same published 19 CFM at 100 PSI and pressure-lubricated pump. This E450 adds an automatic tank drain and belt tensioner.

Is this a single-phase air compressor?

Yes. Confirm the exact supply voltage and circuit requirements with the manufacturer and a qualified electrician before installation.

Does Silent Air mean it is enclosed?

No. The patented Silent Air intake system reduces intake noise while leaving the motor and pump accessible for service.

Does it have an automatic drain?

Yes. Yes. The dual-timer automatic drain allows adjustable discharge intervals between 1 and 45 minutes, with adjustable valve-open time.

Is it a 100% duty-cycle compressor?

EMAX describes optional head-unloader configurations for extended-running applications, but inclusion on this particular packaged unit must be confirmed. Continuous-run control is not itself a 100% duty-cycle rating. For sustained demand, discuss daily run time and tool requirements before selecting a machine.

Does it include an air dryer?

No. A correctly sized refrigerated air dryer and downstream filtration are separate accessories.

What is the advantage of pressure lubrication?

Oil is distributed to critical pump components through a pressure-lubrication system instead of relying solely on splash oil distribution. Routine maintenance is still required.

Need help selecting an air compressor? Call 877-247-2381 to review your airflow, electrical and air treatment requirements.