EMAX ESP10V120V3-208 10 HP Silent Air | 38 CFM | 208/230V 3Ph
38 CFM at 100 PSI | 175 PSI Maximum | 208/230V Three-Phase | 120-Gallon Vertical Receiver
The EMAX ESP10V120V3-208 E450 Silent Air combines substantial 10 HP three-phase piston-compressor output with the features that matter in a working industrial shop: a pressure-lubricated two-stage cast-iron pump, patented Silent Air™ intake silencer, automatic tank drain and adjustable belt tensioner. Its 120-gallon vertical air receiver provides additional storage for intermittent demand peaks without the long footprint of a horizontal tank.
With 38 CFM at 100 PSI, it is a strong candidate for automotive service, general manufacturing, fabrication and industrial maintenance where three-phase power is available. Compressor selection should also account for tool duty cycle, pressure loss and actual simultaneous consumption.
Key Features and Benefits
- 10 HP / 38 CFM at 100 PSI: High-volume air for demanding workstations and pneumatic tools.
- 175 PSI maximum operating pressure: Flexibility for properly regulated shop distribution.
- Pressure-lubricated cast-iron pump: Gear-driven oil delivery to critical moving components.
- Silent Air™ technology: Patented intake noise suppression and high-capacity filtration.
- 120-gallon vertical receiver: Space-efficient air storage.
- Automatic timed tank drain: Helps remove collected moisture without relying exclusively on manual draining.
- Belt tensioner: Simplifies tension and alignment adjustments.
- 208/230V three-phase: Substantial airflow without three-phase utility service.
What Makes the Pressure-Lubricated Pump Different?
The pressure-lubricated pump employs a gear-driven oil pump at the rear of the crankshaft to direct oil through rifle-drilled passages in the crankshaft and connecting rods, reaching critical bearing and wrist-pin surfaces. A spin-on automotive-style oil filter removes contaminants, a liquid-filled gauge helps monitor oil pressure, and an adjustable regulator permits oil-pressure adjustment as specified by EMAX. An oil-pump bleeder valve supports priming after service. This targeted lubrication approach helps manage friction, wear and heat compared with relying solely on oil splash. Regular lubricant and filter maintenance remain essential.
Cast-Iron Construction and Serviceability
EMAX describes cast-iron crankcases, cylinders, cylinder heads, crankshafts, connecting rods and high-pressure pistons in this pump family. Low-pressure pistons on two-stage pumps use aluminum to reduce reciprocating weight. The four-ring arrangement uses two oil-control rings and two compression rings to help maintain sealing and limit oil carryover. CNC-machined concentric disc valves can be removed for inspection, while replaceable bearing inserts and wrist pins support rebuildability. EMAX also describes precision-honed cylinder surfaces and non-oil-absorbent gaskets in this pump family.
For its 7.5 and 10 HP pump family, EMAX describes a 20-inch cast-iron flywheel with nine cooling fins and two B-style belt grooves. The increased belt contact area supports reliable power transfer, while the cooling fins help move air across the pump. A pump riser is described as an available cooling feature, but inclusion on this exact SKU requires confirmation.
Silent Air™ Noise Suppression
The patented Silent Air™ system channels incoming air through baffles and filtration to reduce intake noise while leaving the motor and pump accessible. EMAX advertises up to 50% quieter operation for its technology; actual performance varies by installation.
Watch the Silent Air demonstration and filtration technology overview.
Automatic Drain, Belt Tensioner and Operating Controls
A timed automatic tank drain removes collected receiver condensate on a programmed schedule, reducing a commonly missed maintenance task. The belt tensioner improves accessibility for keeping the V-belt drive adjusted. EMAX lists continuous-run functionality for this E450 configuration, but the exact head-unloader arrangement and allowable operating duty must be confirmed. Continuous-run features do not establish a 100% duty-cycle rating.
Automatic Drain and Dual-Bolt Belt Tensioner
The EMAX dual-timer drain design allows the operator to adjust drain intervals from 1 to 45 minutes and set the valve-open duration to expel collected receiver condensate. EMAX also describes a discharge muffler on its premium drain assemblies. The dual-bolt belt tensioner permits more controlled alignment and belt adjustments without levering against the motor.
Head Unloaders for Higher-Duty Applications
EMAX offers head-unloader systems that hold the intake valve open when the compressor reaches a preset pressure, allowing the motor to continue turning without compressing air. This can reduce repetitive loaded starts and help move cooling air through the cylinders. Head-unloader installation and continuous-running suitability on this particular ESP10V120V3-208 must be confirmed; this feature does not alone establish a 100% duty-cycle rating.
V-Belt Drive: Why the Design Matters
The dual B-groove belt arrangement provides more contact area for power transfer than a narrow single-belt drive. Sharing load across two belts can reduce belt tension requirements, help minimize strain on motor and compressor bearings, and limit vibration when properly aligned and maintained. These advantages support a durable drive system with practical service access.
This 10 HP model also includes a pump riser for improved airflow beneath the crankcase, a belt tensioner for easier adjustment, and a magnetic starter. EMAX specifies no radiator aftercooler for this configuration.
80-Gallon vs. 120-Gallon: What Changes?
The E450 80-gallon and 120-gallon 10 HP versions both produce 38 CFM at 100 PSI. The 120-gallon receiver provides extra stored air for intermittent peaks, but does not increase compressor output or make an undersized compressor suitable for sustained high air consumption.
Verified Pump, Motor, and Electrical Specifications
This model combines the APP4V1043TP pressure-lubricated pump at 730 RPM with an TEFC 1,740 RPM three-phase motor. EMAX confirms a factory magnetic starter, pump riser, belt tensioner, and automatic tank drain. The manufacturer lists 27.90 A including the 1.15 service factor, 171 A starting/locked rotor current, and a 50 A recommended breaker. Electrical installation must be evaluated by a qualified electrician.
The compressor measures 44 × 31 × 80 inches and weighs 922 lb uncrated. EMAX lists a crated weight of 1,071 lb and crate dimensions of 48 × 46 × 87 inches. Verify receiving and lift equipment capacity before delivery.
Technical Specifications
| Model / SKU | ESP10V120V3-208 |
|---|---|
| Manufacturer Part Number | E01PSXXP10V120V208X |
| UPC | 815002014746 |
| Power | 10 HP |
| Air Delivery | 38 CFM at 100 PSI |
| Maximum Working Pressure | 175 PSI |
| Voltage / Phase | 208/230V / 3 Phase / 60 Hz |
| Receiver | 120 Gallon Vertical |
| Pump Model | APP4V1043TP |
| Pump Type | Two-stage pressure-lubricated piston |
| Pump Speed | 730 RPM |
| Motor | TEFC, 1,740 RPM |
| Peak Starting Amps | 171 A |
| Locked Rotor Amps | 171 A |
| Full Load Amps + 1.15 SF | 27.90 A |
| Recommended Breaker | 50 A (confirm with qualified electrician) |
| Silent Air | Included |
| Automatic Tank Drain | Included |
| Magnetic Starter | Included |
| Belt Tensioner | Included |
| Pump Riser | Included |
| Radiator Aftercooler | Not included |
| Smart Air | Not included |
| Outlet Size | 1 inch |
| Belt Count | 2 |
| Oil Capacity | 2 quarts |
| Uncrated Dimensions | 44 × 31 × 80 inches |
| Crated Dimensions | 48 × 46 × 87 inches |
| Uncrated Weight | 922 lb |
| Crated Weight | 1,071 lb |
| Estimated Pump Life | 70,000 hours (manufacturer estimate; maintenance required) |
| Certifications | ETL, ASME, CRN |
| Service Kit | EFKIT008AWBS |
Before You Order
- Add the CFM demand of tools operating simultaneously, not just the largest tool.
- Check required pressure at the workstation after piping and filter losses.
- Verify 208/230V three-phase electrical supply, circuit protection and starting requirements.
- Plan ventilation and service clearance around the compressor.
- For extended air demand, confirm duty cycle and discuss whether a rotary screw compressor would be a better fit.
Complete Your Compressed-Air System
Consider a correctly sized air dryer, compressed-air filtration and maintenance supplies. These can be selected around your desired air quality, environment and work schedule.
Frequently Asked Questions
Is the ESP10V120V3-208 a three-phase compressor?
Yes. The ESP10V120V3-208 is configured for 208/230V three-phase electrical service. Confirm wiring, starting current and protective devices with a qualified electrician.
How much air does this 10 HP compressor produce?
EMAX rates it at 38 CFM at 100 PSI, with a maximum operating pressure of 175 PSI.
Does it include Silent Air™?
Yes. The patented EMAX intake silencer uses baffle plates and filter media to reduce compressor intake noise.
How does it differ from the 10 HP E350?
Both are listed at 38 CFM at 100 PSI. The E450 adds a belt tensioner, automatic tank drain and manufacturer-listed continuous-run controls.
Does it have a pressure-lubricated pump?
Yes. Its pressure-lubricated cast-iron pump uses a dedicated oil-delivery system, unlike splash-lubricated entry-level models.
Does continuous-run mean 100% duty cycle?
No. The exact head-unloader arrangement and appropriate duty cycle should be confirmed for your use before selecting the compressor for sustained workloads.
Is an air dryer included?
No. Dryers and downstream filters are selected separately to suit the application.
What maintenance is required?
Maintain oil level and changes, oil and intake filters, belt tension and operation of the automatic tank drain according to EMAX service instructions.
For application-specific compressor sizing, contact Compressed Air Advisors Online at 877-247-2381.