
FENUM M4 4HP Silent Oil-Free Air Compressor
A powerful 4HP silent oil-free compressor delivering clean, stable airflow for demanding mobile, vehicle-mounted and industrial applications.
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- Clean, Oil-Free Air The oil-free pump produces compressed air without lubricating oil in the compression chamber, helping prevent oil contamination while reducing oil-related maintenance.
- 4HP High-Efficiency Motor The 3.0kW motor provides efficient, dependable performance while helping reduce operating noise and withstand demanding conditions.
- 367L/min Free Air Delivery Delivers up to 367L/min of free air at a maximum pressure of 10 bar, providing strong, dependable compressed air performance for demanding mobile and industrial applications. Tested and verified in accordance with AS 4637-2006 standards.
- Low Noise and Vibration Operating at less than 76.5dB, the compressor combines shock absorption with a crank and piston connecting rod vibration dampening to support quieter, smoother and more stable operation.
- Long-Life Internal Components A high-strength aluminium piston, PTFE-based wear-resistant coating and treated cylinder help reduce friction and wear. The cylinder is rated for up to 10,000 hours and the piston for up to 6,000 hours.
- Compact IP68 Design The integrated construction reduces the compressor’s overall size and weight, while IP68 protection helps shield internal components from dust, moisture and environmental contamination.
Clean air without oil contamination
When air quality matters, keeping oil out of the compression process makes a real difference. The oil-free pump design produces compressed air without lubricating oil inside the compression chamber, helping reduce the risk of oil entering the air supply. It also removes a layer of oil-related servicing, giving you cleaner operation and less maintenance to manage over the life of the compressor.

Built to keep working for longer

Large Displacement and Stable Air Output
A compressor needs to keep delivering when the job gets demanding. This system is designed to maintain stable air displacement and exhaust volume as operating pressure increases, helping provide consistent compressed air for applications that rely on steady airflow. The result is dependable output without the performance dropping away as pressure builds.

Longer Service Life
Less time servicing means more time getting the job done. The compressor is built with long-life components, including a piston service life of up to 6,000 hours and a cylinder service life of up to 10,000 hours. Compared with traditional piston-type belt-driven compressor units, the extended component life can help reduce replacement frequency, maintenance requirements and downtime over the life of the machine.
Efficient power in a compact motor

The motor is at the heart of the compressor, so efficiency and reliability matter. This unit uses a high-efficiency motor with distributed winding and an alloy cast aluminium rotor structure to support strong, efficient performance while helping reduce operating noise. The motor design helps deliver dependable compressed air output in a compact, practical system built for everyday use.
Automatic draining without the daily hassle

Condensate naturally collects inside compressed air systems, and leaving it in the receiver can lead to water build-up and additional maintenance. The electronic drain valve automatically discharges condensate from the air tank, reducing the need for manual draining and helping keep the system operating consistently with less day-to-day attention.
Frequently Asked Questions
Got a question about this product? Find answers on how it works, maintenance, setup and everyday use.
