Festo LFR-3/8-D-MIDI-KF 185773 Air Service Unit G3/8 40µm

The Festo LFR‑3/8‑D‑MIDI‑KF is a modular, MIDI‑sized service unit combination designed to filter, regulate, and distribute compressed air. It integrates a manual on/off valve, a 40 µm filter regulator, a branching module, and a pressure switch. The metal bowl guard and die‑cast zinc housing provide mechanical and corrosion resistance, while the manual rotary condensate drain allows water and oil aerosol removal without stopping the machine.

Applications:

• Central compressed air preparation in industrial automation

• Pneumatic systems requiring G3/8 threaded connections and 40 µm filtration

• Point‑of‑use conditioning for valves, cylinders, and actuators

• Maintenance and spare‑part supply for existing Festo D‑series installations

Technical Specifications

• Size: MIDI (55 mm grid dimension)

• Series: D

• Pneumatic connection: G3/8 (female, both ports)

• Grade of filtration: 40 µm

• Drain type: Manual, rotating

• Operating pressure range: 1 bar … 16 bar (14.5 psi … 232 psi)

• Pressure regulation range: 0.5 bar … 12 bar (7.25 psi … 174 psi)

• Max. pressure hysteresis: 0.2 bar

• Normal nominal flow rate: 2420 l/min (DIN 1343)

• Max. condensate volume: 43 ml

• Bowl guard material: Metal (zinc die‑cast)

• Bowl material: Polycarbonate (PC)

• Housing material: Die‑cast zinc

• Actuator lock: Rotary knob with detent

• Mounting position: Vertical ±5°

• Product weight: approx. 2.40 kg

• Operating / media temperature: –10 °C … +60 °C

• Storage temperature: –10 °C … +60 °C

Standards & Compliance

• Compressed air quality output: ISO 8573‑1:2010 [7:8:4]

• Directives: RoHS‑compliant, CE, UKCA

• Corrosion resistance class (CRC): 2 – moderate corrosion stress

• LABS (PWIS) conformity: VDMA24364‑B1/B2‑L

• Maritime classification: refer to manufacturer certificate

System Integration

• Belongs to the Festo D series of modular service units (size MIDI). The housing is made of die‑cast zinc and mechanical components comply with the 55 mm grid dimension standard.

• Mounting accessories are included; in‑line installation via G3/8 female threads.

• For maintenance routines, the filter element can be replaced independently; the metal bowl guard and manual rotary drain support long‑term service intervals.

Related Products

• LFR‑3/8‑D‑MIDI‑KC – Service unit with higher flow (2700 l/min)

• LFR‑3/8‑D‑MIDI‑KF‑A – Same unit with automatic condensate drain

• LFR‑3/8‑D‑MIDI‑A – Basic filter regulator (manual drain, with pressure gauge)

• Service unit mounting accessories – Wall brackets and connecting plates (order separately)

• Filter element replacement kit – 40 µm replacement element (order separately)