Air-Filter-regulators - 2 pieces - Classic-line - A - FRLs | Hafner

Two-Piece Filter Regulator Units Hafner Classic-line A – FRL

The Hafner FRL Classic-line A units are two-piece compressed air preparation assemblies, consisting of a filter-regulator and lubricator. These assemblies are installed at the inlet of pneumatic circuits where filtration, pressure regulation, and controlled lubrication of actuators or tools are required. Lubrication is not recommended for circuits with components designed for dry air or in applications where oil carryover may affect products, sensors, or processes.

Technical Versions

• FRL-0: G 1/8” or G 1/4”, flow rate 260 l/min, size A-0.
• FRL-1: G 1/8”, G 1/4” or G 3/8”, flow rate 1100 l/min, size A-1.
• FRL-2: G 1/4”, G 3/8” or G 1/2”, flow rate 2500 l/min, size A-2.
• FRL-3: G 1/2”, G 3/4” or G 1”, flow rate 4300 l/min, size A-3.

Pressure and Filtration

Operating inlet pressure range: 1.5–15 bar. Adjustable outlet pressure: 0.5–12 bar. Filtration grade: 20 μm, suitable for general air preparation upstream of pneumatic valves, cylinders, and tools.

Semi-Automatic or Automatic Drain

FRL versions feature semi-automatic drain. FRL-A versions offer automatic drain, available in sizes A-2 and A-3 (flow rates 2500 and 4300 l/min). Automatic drain is recommended for continuous operation lines or locations with limited access.

Selection Criteria

Selection is based on line flow rate, connection thread, required outlet pressure, lubrication need, drain type, and available installation space. Lubricator adjustment should be performed post-commissioning to prevent excessive oil carryover.

Maintenance

Regular checks: filter element, lubricant level, drain operation, pressure stability, thread leakage, and water accumulation in the bowl.