German Made Moog Servo Valve with 0-1800 rpm Speed Range and 5 Days Delivery for Control Pressure and Flow

• Torque Motor Issues:
  • Broken Coils: Result in no current, valve does not respond
  • Contamination in Air Gap: Causes the armature to stick, preventing valve movement
  • Loose Fasteners or Worn Parts: Can lead to increased null bias or instability
• Nozzle/Flapper Stage Issues:
  • Clogged Nozzles or Orifices: Often caused by oil contamination, leading to reduced frequency response, poor resolution, and system instability
• Spool Amplifier Stage Issues:
  • Spool Sticking: Caused by contaminated oil or a deformed spool, resulting in distorted response or complete seizure
  • Cutting Edge Wear: Increases internal leakage, causes null shift, and reduces stability

• Cylinder Refusal to Move: Often due to a stuck servo valve
• Uncontrolled Valve Movement: Sudden full opening/closing of a cylinder without a command change, often due to a clogged nozzle
• Cylinder Oscillation ("Cylinder Hunting"): Can be caused by high internal leakage, poor resolution, or instability in the valve's null zone
• High Cylinder Lag

• Oil Filtration: Use high-quality filters and adhere to a strict oil analysis and replacement schedule
• System Design: The hydraulic system should be designed to minimize dead spots where contaminants can accumulate
• Regular Inspection: Periodically check the valve and system for leaks, unusual noises, or changes in performance
• Preventive Maintenance: Follow the manufacturer's recommended maintenance intervals

MOOG is known for its ability to provide custom solutions. They can modify product components to enhance performance or meet specific application requirements.