Festo Solenoid Valve Black Arm

Solenoid Valve Black Arm (Festo) for Lely A3

The Solenoid Valve Black Arm is a high-performance pneumatic component manufactured by Festo, specifically designed for the arm cylinders of Lely robotic milking systems. These valves are critical for the precise extension and retraction of the robot arm, ensuring accurate teat cup attachment.

Product Variants & Compatibility

The "Black Arm" valve is available in two specific sizes to match different air hose diameters used on the Lely A3 arm assemblies.

• Primary Compatibility: Lely Astronaut A3 robots.
• Manufacturer: Festo (Original Equipment Quality).

Key Features

• Precision Control: Engineered to provide the rapid response times necessary for the 24/7 high-speed movements of the robotic arm.
• Robust Housing: Features the signature black composite/metal housing designed to withstand the harsh barn environment, including high humidity and chemical exposure.
• Service Recommendation: It is often recommended by technicians to replace both valves on a cylinder at the same time to ensure balanced pressure and consistent arm speed.
• Direct Replacement: While the Festo type numbers may vary slightly over production years, these Lely-specific part numbers ensure exact electrical and pneumatic compatibility.

Maintenance Insight

If your robot arm is experiencing jerky movements, slow attachment times, or "Arm Cylinder Timeout" alarms, these solenoid valves are the primary components to inspect. Over time, internal seals can wear or accumulate moisture-related debris from the compressed air system.