Magnet Valve 575998 Festo 3/2

Festo 3/2-Way Magnet Valve (575998)

The Festo 575998 is a specialized 3/2-way solenoid valve used as a critical control component in the pneumatic manifolds of the Lely Astronaut A3 and A4. In a 3/2-way configuration, the valve features three ports and two positions, typically used to feed and exhaust a single-acting pneumatic cylinder or to act as a pilot control for larger valves in the robot arm.

Product Identification & Compatibility

Key Technical Features

• 3/2-Way Functionality: This valve controls the flow of compressed air to a specific component while providing a path for that air to exhaust when the valve is deactivated. This is essential for components like the teat cup cleaners or gate cylinders.
• Compact Manifold Design: Engineered to fit into the high-density valve terminals (manifolds) located inside the robot's main control cabinet.
• High Cycle Reliability: Designed for the millions of operations required in 24/7 robotic milking, ensuring the robot doesn't suffer from "stuck" air components.
• LED Status Indicator: Often features an integrated LED on the coil or connector to provide instant visual confirmation of electrical power, aiding in rapid troubleshooting during barn rounds.

Maintenance & Troubleshooting

If the robot experiences "Cylinder Error" or "Vacuum Shut-off Failure," this valve should be inspected for the following:

1. Exhaust Blockage: 3/2 valves must exhaust air to function. If the tiny silencer on the manifold is clogged with dust or moisture, the valve will "stall" and the cylinder it controls will move slowly or not at all.
2. Solenoid Burnout: If the LED indicator is off when the robot's software shows the valve should be "Active," the electrical coil may have failed.
3. Internal Spool Wear: If you hear a faint, constant "hissing" from the valve bank, the internal seals of the 575998 may be worn, allowing air to bypass the ports.

Pro Tip

When replacing this valve on a Lely manifold, ensure the mounting gasket is perfectly aligned. Even a slight misalignment can cause a small air leak that triggers the robot's compressor to run more frequently than necessary, leading to premature compressor wear.