EMAX ESP07V080V3-208 7.5 HP Silent Air | 31 CFM | 208/230V 3Ph

31 CFM at 100 PSI | 175 PSI maximum | 208/230V three-phase | 80-gallon vertical receiver

The EMAX ESP07V080V3-208 E450 Silent Air combines high-output industrial piston compression with premium service features. Its 7.5 HP pressure-lubricated two-stage cast-iron pump produces 31 CFM at 100 PSI. A patented Silent Air™ intake silencer, automatic tank drain, and belt tensioner make it a practical choice for automotive service, industrial maintenance and fabrication shops with three-phase electrical service.

Key Features and Benefits

31 CFM at 100 PSI: Output for demanding shop tools and equipment. 175 PSI maximum: Supports higher-pressure regulated systems. Automatic timed drain: Helps remove condensate without relying entirely on manual drainage. Dual-bolt belt tensioner: Improves accessibility and ease of adjustment. Silent Air™: Reduces intake noise while keeping the pump open for service.

Pressure-Lubricated Cast-Iron Pump

The gear-driven oil pump sends lubricant through rifle-drilled crankshaft and connecting-rod passages to critical bearings and wear points. An automotive-style spin-on oil filter helps remove contaminants, while an oil pressure gauge allows monitoring. EMAX describes cast-iron heads, cylinders, crankshaft, connecting rods and high-pressure pistons, as well as serviceable disc valves and a four-ring piston arrangement. These features help support durability and long-term serviceability.

Silent Air™ Technology and V-Belt Drive

The patented intake silencer uses acoustic baffles and filtration media. EMAX advertises up to 50% quieter operation for its Silent Air technology, with actual results depending on installation. Its 7.5 HP pressure-lubricated pump family uses a heavy cast-iron flywheel with cooling fins and twin B-style belt grooves to help transfer power and move cooling air.

E450 Features That Simplify Maintenance

Dual-timer automatic receiver drain: Adjustable discharge intervals of 1–45 minutes and adjustable open time help expel accumulated condensate. EMAX describes a muffler on its premium drain assemblies to reduce discharge noise.

Dual-bolt belt tensioner: Allows more accurate belt alignment and tension adjustments without prying against the motor. The dual B-groove drive increases contact area for power transmission and helps distribute belt load.

Pump riser: Factory included on this model. Elevating the pump improves airflow beneath the crankcase and around the oil reservoir.

Magnetic starter and TEFC motor: These are confirmed included on the ESP07V080V3-208. The 230V three-phase motor has a published 20.47 A full-load figure including the manufacturer’s 1.15 service factor. An electrician should verify power and protective devices.

Pressure-Lubricated Pump Construction

The APP4V1043TP pump employs a gear-driven oil pump, rifle-drilled crankshaft and connecting-rod passages, and a spin-on oil filter to deliver lubricant to critical bearing surfaces. An oil-pressure gauge enables monitoring during operation. EMAX describes a cast-iron crankcase, cylinders, heads, crankshaft, connecting rods and high-pressure piston, with an aluminum low-pressure piston in its two-stage design.

Four-ring piston assemblies, serviceable concentric disc valves and replaceable bearing inserts and wrist pins are designed to support sealing, service access and long pump life. For this horsepower family, EMAX describes a 20-inch cast-iron flywheel with nine cooling fins and two B-section belt grooves.

E350 vs. E450: Which Should You Choose?

Both series are rated for 31 CFM at 100 PSI. The E450 adds an automatic tank drain and belt tensioner, making routine service more convenient. For sustained demand, the operating duty cycle matters more than the tank capacity. Continuous-run options must not be confused with a guaranteed 100% duty cycle.

Technical Specifications

Sizing and Installation

Compare compressor delivery to the simultaneous CFM demands of connected equipment. A qualified electrician should verify three-phase power, branch circuit sizing and starting requirements. For moisture-sensitive processes, choose an appropriately sized air dryer and air filtration. Find routine service products in our maintenance collection.

Frequently Asked Questions

Is the ESP07V080V3-208 a three-phase compressor?

Yes. This version is built for 208/230V three-phase service. Verify the installation with a qualified electrician.

How much air does it deliver?

31 CFM at 100 PSI; the maximum operating pressure is 175 PSI.

How does E450 differ from E350?

Both 7.5 HP models produce 31 CFM at 100 PSI. The E450 adds automatic tank drainage and a belt tensioner.

Is Silent Air included?

Yes, EMAX's patented intake noise-reduction system is included.

Does it have a refrigerated air dryer?

No. A dryer and air filters are separate accessories.

Can I operate it continuously?

Confirm the head-unloader configuration and duty-cycle requirements before selecting it for high-duty applications.

Is this the same as the 460V model?

No. The ESP07V080V3-460 is a separate 460V three-phase model.

How is the pump lubricated?

It uses pressure lubrication with a gear-driven oil pump and serviceable spin-on oil filter.

What maintenance is required?

Follow manufacturer service schedules for oil, filters, belts and the timed tank drain.

Need assistance matching equipment and air demand? Call 877-247-2381.