Axtel GM-7L Rotary piston blower

• Pneumatic conveying systems for bulk materials in industries such as food processing, plastics, and chemicals.
• Wastewater treatment plants for aeration and agitation processes.
• Industrial vacuum systems requiring consistent air flow.
• Dust collection systems to maintain negative pressure and move particulate matter.

Motor power

This unit is specified with a 5.5kW motor. For this class of rotary piston blower, motor powers typically range from 2.2kW to 30kW depending on the required flow and pressure.

Power supply

This unit is 3-phase. Rotary piston blowers of this size commonly require a 400V, 50Hz, 3-phase electrical supply in the UK.

Typical flow rate

For a GM-7L model, typical free air delivery can range from approximately 300 to 700 m³/hr, depending on the operating pressure.

Typical pressure range

Rotary piston blowers are typically designed for positive pressures up to 1,000 mbar (1 bar) or vacuum applications down to -500 mbar.

Operating principle

This equipment operates on the Roots blower principle, using two counter-rotating lobes to trap and move air, providing a constant volume flow.

Maintenance requirements

Routine maintenance typically involves checking and changing oil, inspecting belts (if applicable), and ensuring filter cleanliness. Bearings and seals may require periodic replacement.

• What is the primary difference between a rotary piston blower and a screw compressor?

  Rotary piston blowers (Roots blowers) provide a constant volume of air at lower pressures, suitable for conveying and aeration. Screw compressors deliver higher pressures and are more efficient for continuous high-pressure air demands.

• Can this unit be used for vacuum applications?

• What kind of filtration is typically required for the inlet air?

• Is this blower suitable for continuous operation?

• What are the typical noise levels for a blower of this size?

Used air compressors are valued for their durability and cost-effectiveness in industrial applications. Buyers typically prioritise checking maintenance history, motor condition, and tank integrity, as these significantly affect performance and longevity. Industry sentiment favours established brands known for reliability. Common strengths include robust construction, long operational lifespan when properly maintained, and substantial savings compared to new equipment. Prospective purchasers should verify pressure ratings and output capacity match their operational requirements before committing to purchase.

General overview for this equipment type