Powerex STS Series 7.5 HP Oil-Less Scroll Air Compressor – 120 Gallon (Simplex)

For facilities that require higher airflow with uncompromising air purity, the Powerex STS Series 7.5 HP Simplex Oil-Less Scroll Air Compressor with 120-Gallon Tank delivers quiet, reliable performance for demanding clean-air applications. Built around Powerex’s proven scroll compressor technology, this system is engineered for environments where oil contamination, excessive noise, and high maintenance are unacceptable.

The STS Series utilizes 100% oil-less scroll pump technology, eliminating the risk of oil carryover while significantly reducing maintenance and long-term operating costs. With smooth operation, extremely low vibration, and a compact tank-mounted footprint, this system is ideal for medical, laboratory, pharmaceutical, food processing, and precision manufacturing environments.

Clean, Quiet, Oil-Free Performance

The 7.5 HP simplex scroll pump is mounted directly to a 120-gallon corrosion-resistant air receiver, providing increased air storage to support higher demand while reducing compressor cycling. The larger tank capacity helps maintain stable system pressure during continuous or intermittent usage.

The system comes standard with an electronic condensate drain, automatically removing moisture from the air receiver to protect downstream equipment and maintain air quality without manual draining.

Because the compressor is completely oil-free, users benefit from:

• No oil changes

• No oil carryover

• No oil-water separators required

• Reduced downstream filtration requirements

Airflow Performance

The Powerex STS Series 7.5 HP oil-less scroll compressor delivers dependable airflow for clean-air applications:

• Approximately 23.1 SCFM at standard operating pressure

This higher airflow output makes the 7.5 HP STS system well suited for facilities with greater continuous or simultaneous air demand while maintaining oil-free air quality.

Configurable Dryer Options

The STS 7.5 HP system can be configured to match your air quality requirements:

• No Dryer – For facilities with existing air treatment

• Refrigerated Air Dryer – Removes moisture to protect piping and equipment

• Desiccant Air Dryer – Provides ultra-dry air for critical processes requiring very low dew points

Dryer options are factory-integrated for a clean, space-efficient installation.

Voltage & Electrical Options

The Powerex STS 7.5 HP system is available in three-phase configurations only:

• 208V / Three Phase

• 230V / Three Phase

• 460V / Three Phase

Each unit includes a UL-listed magnetic starter and a UL508A-listed control panel for safe, code-compliant operation.

Pressure Configuration

• Standard pressure configuration only
  (The 7.5 HP STS Series is not offered in a high-pressure 145 PSI configuration.)

Standard Features & Benefits

• 7.5 HP simplex oil-less scroll pump

• 120-gallon corrosion-resistant air receiver

• Electronic condensate drain (standard)

• 100% oil-free compressed air

• Extremely low noise and vibration

• Compact tank-mounted footprint

• Lower maintenance costs compared to oil-flooded compressors

• Designed for continuous-duty operation

Typical Applications

• Medical and dental facilities

• Laboratories and research environments

• Pharmaceutical and food processing

• Instrumentation and controls

• Clean manufacturing operations

Why Buy from Compressed Air Advisors Online?

Compressed Air Advisors Online is America’s choice for compressed air solutions, offering nationwide expertise and premium clean-air systems from trusted manufacturers like Powerex. Our team helps customers properly size and configure voltage, air treatment, and storage so the system performs exactly as intended from day one.