Technical Overview

The Festo LR-1/8-D-O-MINI (part number 162590) is a highly reliable pneumatic pressure regulator from the D-series, engineered for precision air and inert gas control in industrial automation systems. Featuring a directly actuated diaphragm with secondary venting, it guarantees constant output pressure through active primary pressure compensation. The unit is built with a rugged die-cast zinc housing and sub-base paired with NBR seals, delivering exceptional durability and moderate corrosion resistance. It operates efficiently under an input pressure of 1 to 16 bar and allows highly granular regulation between 0.5 and 12 bar. With a standardized nominal flow rate of 800 L/min via G 1/8 pneumatic connections, it easily integrates into dense pneumatic networks. The "Mini" footprint design includes a secure rotary knob with a mechanical detent to prevent accidental shifting, and the architecture supports flexible front panel or in-line installations.

Key Features

Directly actuated diaphragm architecture with secondary venting for rapid pressure relief
Active primary pressure compensation ensures completely constant output despite input fluctuations
Integrated rotary knob with mechanical detent prevents unauthorized or accidental adjustments
Heavy-duty die-cast zinc housing and NBR seals for industrial-grade durability
Highly flexible mounting geometry supporting in-line, front panel, or manifold assembly
Optimized for both standard compressed air (ISO 8573-1:2010) and inert gases

Technical Specification Matrix

Parameter	Value
Pneumatic Connection	G 1/8
Maximum Input Pressure	16 bar
Pressure Regulation Range	0.5 to 12 bar
Standard Nominal Flow Rate	800 L/min
Operating Temperature Range	-10°C to 60°C
Housing Material	Die-cast zinc
Seal Material	NBR
Design Structure	Directly controlled diaphragm regulator
Actuator Lock	Rotary knob with detent

Industrial Applications

1. Automated Pneumatic Clamping Stations

In CNC machining centers, consistent pneumatic clamping is critical to securing the workpiece without causing deformation. The regulator is placed inline to control the exact pressure supplied to the holding cylinders.

Problem Solved

Eliminates material damage or slippage by maintaining exactly the set clamping pressure through active primary pressure compensation, regardless of sudden factory air supply fluctuations.

Primary pressure compensation0.5-12 bar regulationDiaphragm regulatorPneumatic clamping

2. Compact Robotic Assembly Cells

Small-scale automated assembly lines utilize robotic end-effectors powered by compressed air. This regulator is installed directly on the manifold feeding the pneumatic robotic arms.

Problem Solved

Fits perfectly within extremely tight spatial constraints in robotic cells while delivering up to 800 L/min of consistent airflow, preventing pressure drops during rapid, high-frequency actuations.

800 L/min flow rateMini grid dimensionD-SeriesIn-line installation

3. Inert Gas Purging Systems

Used in advanced electronics manufacturing to supply inert shielding gas for preventing oxidation during wave soldering. The regulator precisely manages the flow of nitrogen into the reflow oven.

Problem Solved

Safely regulates standard inert gases with extreme precision, utilizing robust NBR seals and a die-cast zinc housing to maintain long-term, leak-free reliability without risk of contamination.

Inert gases operating mediumDie-cast zinc housingNBR seals-10°C to 60°C operating temperature

Festo LR-1/8-D-O-MINI Pneumatic Pressure Regulator

Festo LR-1/8-D-O-MINI Pneumatic Pressure Regulator

Technical Overview

Key Features

Technical Specification Matrix

Industrial Applications

1. Automated Pneumatic Clamping Stations

2. Compact Robotic Assembly Cells

3. Inert Gas Purging Systems