FESTO LRLL-14-QS-10 Differential Pressure Regulator | 1/4 Thread, QS-10 Push-in Specs

FESTO LRLL-14-QS-10 differential pressure regulator specifications. 1/4" male thread port, QS-10 push-in connector, 262 l/min flow rate, 2-6 bar regulation range. For pneumatic system pressure control applications.

FESTO LRLL-14-QS-10 Differential Pressure Regulator

The FESTO LRLL-14-QS-10​ is a differential pressure regulator​ from the LRLL series, featuring a 1/4" male thread port​ and a QS-10 push-in connector. This compact pneumatic valve is designed to maintain a constant differential pressure between two points in a pneumatic system, regardless of inlet pressure variations. With direct-acting piston design and continuous compressed air supply, it provides reliable pressure regulation for industrial automation applications, including pneumatic control systems, actuator speed control, and pressure stabilization in pneumatic circuits.

Key Features

• Differential Pressure Regulation:​ Maintains constant pressure difference between two ports

• 1/4" Threaded Port:​ Standard G1/4 or R1/4 male thread connection

• QS-10 Push-In Connector:​ Quick connection for 10mm OD tubing

• Direct-Acting Piston Design:​ Fast response and precise pressure control

• Continuous Air Supply:​ Suitable for applications requiring uninterrupted flow

• Manual Adjustment:​ Screwdriver slot for pressure setting

• Compact Design:​ Space-saving installation in pneumatic panels

• Wide Operating Range:​ 0.2 to 9 bar inlet pressure

• Return Flow Function:​ Allows reverse flow when required

• Robust Construction:​ PBT-reinforced housing for industrial durability

Technical Specifications

Note: Specifications are based on FESTO LRLL series technical documentation and industry standards. The exact configuration for this specific model number includes 1/4" thread port and QS-10 push-in connector.

Model Number Decoding (LRLL-14-QS-10)

• LRLL:​ Series designation (Differential pressure regulator series)

• 14:​ Port 1 connection type (1/4" thread, typically G1/4 or R1/4)

• QS-10:​ Port 2 connection type (QS push-in fitting for 10mm tubing)

Note:​ The "14" indicates 1/4" thread size. The "QS-10" specifies the push-in fitting size for 10mm OD tubing. This is a mixed-port configuration valve with threaded and push-in connections.

Key Differences from Similar Models

Compared to other LRLL series valves:

• LRLL-14-QS-10:​ 1/4" thread​ + QS-10 push-in​ (this model, mixed ports)

• LRLL-14-QS-6:​ 1/4" thread + QS-6 (smaller push-in for 6mm tubing)

• LRLL-14-QS-8:​ 1/4" thread + QS-8 (push-in for 8mm tubing)

• LRLL-14-14:​ 1/4" thread on both ports (no push-in)

• LRLL-QS-10-QS-10:​ QS-10 push-in on both ports (no threaded connection)

• LRLL-3/8-QS-10:​ 3/8" thread + QS-10 (larger thread size)

The 1/4" thread port​ provides standard threaded connection for system integration, while the QS-10 push-in connector​ allows quick connection to 10mm tubing. This mixed-port configuration offers flexibility in system design.

Typical Applications

• Pneumatic Control Systems:​ Maintaining constant pressure in control circuits

• Actuator Speed Control:​ Regulating pressure to control cylinder speed

• Pressure Stabilization:​ Compensating for pressure fluctuations in pneumatic systems

• Process Control:​ Maintaining differential pressure in industrial processes

• Automation Equipment:​ Pressure regulation in automated machinery

• Test and Measurement:​ Pressure control in testing applications

• Pneumatic Instrumentation:​ Pressure supply for pneumatic instruments

Important Selection & Installation Notes

1. Valve Function:​ This is a differential pressure regulator, not a standard pressure regulator. It maintains a constant pressure difference between the two ports, not a fixed outlet pressure.

2. Port Configuration:​ Port 1 is 1/4" male thread (typically G1/4 or R1/4), Port 2 is QS-10 push-in for 10mm OD tubing. Ensure your system connections match these specifications.

3. Pressure Setting:​ The pressure regulation range is 2 to 6 bar. Use a screwdriver to adjust the set pressure. Ensure the system is depressurized before adjustment.

4. Operating Pressure:​ Do not exceed 9 bar maximum inlet pressure. The minimum operating pressure is 0.2 bar.

5. Flow Direction:​ The valve has a specific flow direction (typically indicated by arrow). Install with correct orientation.

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. Mounting:​ Can be mounted via screw-in installation. Ensure proper alignment and avoid excessive force during installation.

8. Temperature Range:​ Do not operate outside 0°C to 60°C range.

9. Flow Capacity:​ The 262-269 l/min flow rate is suitable for most standard pneumatic applications. Verify your system flow requirements.

10. Thread Type:​ Confirm the exact thread type (G1/4, R1/4, or NPT1/4) for your system. Use appropriate thread sealant if required.

11. Maintenance:​ Regular inspection for leaks is recommended. Check for proper sealing and smooth operation.

12. Differential Pressure Application:​ This valve maintains the pressure difference between the two ports. For standard pressure regulation (fixed outlet pressure), consider other pressure regulator models.

Note: For complete installation guidelines, dimensional drawings, and detailed technical data, consult the official FESTO LRLL 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.