FESTO MS6-LFR Flow Control Valve | 1/2" NPT, Brass, Manual, Needle Valve, Compressed Air Specs

FESTO MS6-LFR Flow Control Valve | 1/2" NPT, Brass, Manual, Needle Valve, Compressed Air Specs

FESTO MS6-LFR-12-D6-C-R-V-AS flow control valve specifications. Brass body, 1/2" NPT, manual needle valve, compressed air. Part number decoding and technical data.

Product Overview

The FESTO MS6-LFR-12-D6-C-R-V-AS​ is a manual flow control valve​ from Festo's extensive fluid control product line. Specifically, it is a needle valve​ designed for precise regulation of flow rate in compressed air systems. This valve features a brass body, 1/2" NPT port connections, and a manual adjustment knob​ with locking function. The alphanumeric designation provides a complete specification: an adjustable, lockable, manual needle valve for controlling airflow in pneumatic circuits.

Product Code Breakdown (MS6-LFR-12-D6-C-R-V-AS)

Each segment of the part number defines a specific feature:

Technical Specifications

Note: Specifications are based on Festo MS6 series documentation. The Cv value and flow rate are approximate and highly dependent on the valve setting, pressure, and system conditions.

Key Features

• Precise Flow Control:​ Infinitely adjustable needle design for fine-tuning airflow.

• Lockable Setting:​ Integrated locking ring prevents accidental adjustment after setting.

• Robust Brass Construction:​ Durable body suitable for industrial compressed air systems.

• Standard NPT Ports:​ 1/2" NPT threads for easy integration into North American pneumatic systems.

• Clear Scale:​ Adjustment knob with graduated scale for reproducible settings.

• Bidirectional Flow:​ Can be installed for flow control in one direction (check function in the other).

• Compact Design:​ Space-saving inline design.

• Wide Pressure Range:​ Suitable for standard plant air pressures (up to 145 psi).

• NBR Seals:​ Compatible with lubricated and non-lubricated air.

Flow Characteristics

Note: The "AS" variant is typically adjustable in one flow direction only. Flow in the opposite direction may be free or restricted depending on the internal check valve configuration.

Typical Applications

• Cylinder Speed Control:​ Regulating the extension and/or retraction speed of pneumatic cylinders.

• Actuator Timing:​ Controlling the operational speed of pneumatic actuators.

• Flow Metering:​ Precisely setting a specific airflow rate for a process.

• Pneumatic Circuit Tuning:​ Balancing flow in multi-actuator circuits.

• Pressure Compensation:​ Used as a variable orifice to create a controlled pressure drop.

• General Process Regulation:​ Any application requiring manual adjustment of compressed air flow.

Selection and Sizing Considerations

Important Installation & Operational Notes

1. Installation Direction:​ Install according to the flow arrow marked on the valve body. The "AS" version controls flow in one specific direction.

2. Thread Sealing:​ Use appropriate thread sealant (e.g., PTFE tape or liquid thread sealant) compatible with compressed air on NPT threads. Do not overtighten.

3. System Cleanliness:​ Install in a clean, dry compressed air system. Use a filter upstream to protect the valve seat from particulate contamination.

4. Adjustment Procedure:​ Loosen the locking ring before turning the adjustment knob. Turn clockwise to reduce flow (close), counter-clockwise to increase flow (open). Re-tighten the locking ring to secure the setting.

5. Pressure Rating:​ Do not exceed the maximum operating pressure of 10 bar (145 psi).

6. Temperature Limits:​ Do not expose to media or ambient temperatures outside the 0°C to +60°C range.

7. Leakage:​ This is a regulating valve, not a guaranteed bubble-tight shut-off valve. Some minimal leakage is possible when fully closed.

8. Maintenance:​ If performance degrades (inability to shut off flow), the valve seat or needle may be worn or contaminated and require cleaning or replacement.

Note: This data sheet provides general specifications for the FESTO MS6-LFR-12-D6-C-R-V-AS manual needle valve. For complete installation instructions, flow characteristic curves, and detailed safety information, consult the official Festo MS6 Series Product Documentation. Always verify media compatibility, pressure, and flow requirements for your specific application.