FESTO LFR-D-MAXI Filter Regulator | MAXI Size, D Series, 40μm Filter Specs

Meta Description:​ FESTO LFR-D-MAXI filter regulator specifications. MAXI size, D series, 40μm filtration, manual drainage, 80cm³ condensate capacity. For compressed air preparation in industrial automation.

FESTO LFR-D-MAXI Filter Regulator

The FESTO LFR-D-MAXI​ is a filter regulator unit​ from FESTO's D series, featuring MAXI size​ configuration. This integrated unit combines filtration and pressure regulation functions in a single compact housing. It is designed for industrial compressed air preparation systems, providing reliable air filtration and precise pressure regulation for pneumatic equipment. The MAXI size offers high flow capacity suitable for demanding applications, with 40μm filtration grade, manual drainage, and standard mounting options for easy integration into pneumatic circuits.

Key Features

• Integrated Design:​ Combines filter and pressure regulator in one unit

• MAXI Size:​ High flow capacity for demanding applications

• 40μm Filtration:​ Effective removal of solid particles from compressed air

• Manual Drainage:​ Manual condensate drainage system

• Pressure Regulation:​ Precise pressure control with adjustable range

• D Series Construction:​ Robust design for industrial environments

• Standard Mounting:​ Multiple mounting options with accessories

• Compact Footprint:​ Space-saving design despite MAXI size

• Wide Operating Range:​ Suitable for various industrial applications

Technical Specifications

Note: Specifications are based on FESTO D series technical documentation and industry standards. The LFR-D-MAXI is a base model designation; specific port configurations (thread sizes, connection types) are indicated by additional suffixes in the complete model number.

Model Number Decoding (LFR-D-MAXI)

• LFR:​ Product type designation (Filter Regulator)

• D:​ Series designation (D series, industrial grade)

• MAXI:​ Size designation (MAXI size, largest in the series)

Note:​ The complete model number typically includes additional suffixes to specify port connections, pressure gauge inclusion, and other options. The base "LFR-D-MAXI" indicates the core configuration without specific port details. Common suffixes include port size designations (e.g., -G1/2 for 1/2" thread, -QS6 for push-in fitting) and options like -A for pressure gauge inclusion.

Key Differences from Similar Models

Compared to other FESTO filter regulators:

• LFR-D-MAXI:​ MAXI size, D series, 40μm filtration, manual drainage (this base model)

• LFR-D-MIDI:​ MIDI size with smaller flow capacity (approx. 4,500 l/min)

• LFR-D-MINI:​ MINI size with lower flow (approx. 1,700 l/min)

• LFR-D-MICRO:​ MICRO size for very small applications

• LFR-5M-D-MAXI:​ Same size with 5μm filtration grade

• LFR-D-MAXI-A:​ MAXI size with pressure gauge included

• LFR-D-MAXI-KF:​ MAXI size with specific port configuration

The MAXI size​ provides the highest flow capacity in the D series, making it suitable for applications requiring large air volumes. The 40μm filtration​ is standard for general industrial applications, removing most solid contaminants from compressed air.

Typical Applications

• Industrial Pneumatic Systems:​ Primary air preparation for machine tools and automation equipment

• Large-Scale Automation:​ High-flow applications in manufacturing lines

• Compressed Air Distribution:​ Central air preparation stations

• Process Control Systems:​ Air supply for pneumatic control valves and actuators

• Packaging Machinery:​ High-volume air requirements in packaging equipment

• Material Handling:​ Pneumatic systems in conveyor and handling equipment

• General Industrial:​ Various applications requiring filtered and regulated compressed air

Important Selection & Installation Notes

1. Size Consideration:​ The MAXI size provides approximately 9,400 l/min flow capacity. Ensure this meets your application's air consumption requirements. For lower flow applications, consider MIDI or MINI sizes to save space and cost.

2. Filtration Grade:​ The 40μm filtration is suitable for general industrial applications. For applications requiring cleaner air (e.g., precision instruments, food processing), consider 5μm or finer filtration models.

3. Port Configuration:​ The base LFR-D-MAXI designation does not specify port connections. Verify the complete model number for specific port sizes (e.g., G1/2, G3/4, QS6) to ensure compatibility with your system.

4. Pressure Gauge:​ This base model may not include a pressure gauge. If pressure monitoring is required, select variants with -A suffix or add a separate pressure gauge.

5. Operating Pressure:​ Do not exceed 16 bar maximum operating pressure. The pressure regulation range is 0.5 to 12 bar.

6. Air Quality:​ Use filtered, lubricated or non-lubricated compressed air according to ISO 8573-1:2010. If using lubricated air, maintain consistent lubrication.

7. Installation:​ Install in vertical position (±5° tolerance). Ensure proper alignment and avoid side loads during installation.

8. Drainage Maintenance:​ Perform regular manual drainage to prevent water accumulation. For applications with high moisture content, consider automatic drainage options.

9. Flow Direction:​ Install with correct flow direction (typically indicated by arrow on housing). Reverse installation may damage the unit.

10. Temperature Range:​ Do not operate outside -10°C to +60°C range.

11. Maintenance:​ Regularly check filter element condition. Replace when pressure drop increases significantly or according to manufacturer's recommendations.

12. Pressure Setting:​ Adjust pressure setting with the regulation knob. Ensure the system is depressurized before adjustment.

Note: For complete installation guidelines, dimensional drawings, and detailed technical data, consult the official FESTO D Series Technical Manual​ or contact FESTO technical support. Always verify the exact model number configuration with the manufacturer, as notation variations may occur in different documentation systems.