Overview
The Festo LR-1/8-D-MINI pressure regulator (part number 159624) is a directly controlled diaphragm regulator built for compressed air systems requiring stable, compensated output pressure. This mini-series unit combines compact form factor with proven reliability, making it suitable for machine tool controls, automated assembly lines, and modular pneumatic circuits where space and performance matter.
Key Features
- Directly actuated diaphragm design — Responsive pressure control with minimal hysteresis (≤0.2 bar)
- Rotary knob with detent lock — Secure adjustment prevents unintended pressure drift
- Integral analog pressure gauge — Real-time outlet pressure monitoring without separate instrumentation
- Primary pressure compensation — Maintains constant outlet pressure despite inlet pressure fluctuations
- Secondary venting — Controlled exhaust for stable transient response
- Die-cast zinc body — Corrosion-resistant construction rated for moderate corrosive environments (CRC 2)
- Mounting position flexible — Install in any orientation without performance degradation
- Lubricated operation capable — Compatible with oil-lubricated air systems when required
Technical Specifications
- Operating Pressure Range: 1–16 bar
- Pressure Regulation Range: 0.5–12 bar outlet
- Standard Nominal Flow Rate: 800 L/min
- Port Connection: G1/8 (1/8″ NPT)
- Maximum Pressure Hysteresis: 0.2 bar (0.02 MPa)
- Operating Temperature: −10°C to +60°C
- Design Type: Directly controlled diaphragm regulator
- Actuator: Rotary knob with detent lock
- Pilot Medium: Compressed air (ISO 8573-1:2010 [7:4:4]) or inert gas
- Primary Material: Die-cast zinc
- Weight: 350 g
- Corrosion Resistance Class: CRC 2 (moderate corrosive stress)
- Pressure Gauge: Analog dial with dual-scale MPa/bar
Typical Applications
- Pneumatic tool circuits and hand-operated equipment
- Machine tool spindle and hydraulic pilot circuits
- Modular automation and actuator control systems
- Laboratory and test bench compressed air preparation
- OEM valve manifold and directional control subsystems
- Secondary pressure reduction in multi-stage air treatment trains
Compatibility & Replacements
Compatible With
- Standard ISO 4401 NG6 subplate cavity designs (when mounted on manifolds)
- G1/8 female threaded ports — common on pneumatic directional solenoid valves and flow control valves
- ISO 8573-1:2010 [7:4:4] compressed air systems
- Inert gas (nitrogen, argon) operating environments
- All Festo FX modular filter-regulator-lubricator (FRL) stations
- Standard pneumatic tubing (8 mm × 1.25 mm O.D. polyurethane)
Replaces / Drop-In Replacement For
- LR-1/4-D-MINI (159625) — Larger G1/4 port variant; verify port compatibility before substitution
- Earlier Festo mini-regulator models with G1/8 ports operating in 0.5–12 bar range — consult Festo documentation for legacy model cross-reference
Works With
- Festo DGCI, DGCN, DGCI-PE proportional directional control valves
- Festo DSNU, DSCO double-acting cylinders requiring regulated pilot pressure
- Festo GRIP modular gripper systems with secondary pressure regulation
- Standard ISO 1219-1 pneumatic circuit design software and CAD tools
- P-Touch, Sensormatic, and third-party PLC I/O discrete pressure monitoring via discrete pilot lines
- Proportional valve amplifiers requiring stable, low-hysteresis reference pressure signals
