Oil rotary union

multi-passagehigh-pressurewith seal

Overview
DSTI rotary unions (joints) are designed for hydropower environments to provide continuous and reliable hydraulic fluid transfer and return to turbine blade actuators for pitch control. Units are engineered for integration with electrical slip rings and positioning sensors to supply combined fluid transfer and precise position feedback for turbine control systems.

Key functionality

• Supplies and returns hydraulic power to turbine blade actuators
• Enables blade pitch adjustment to adapt to varying flow and velocity conditions
• Supports integration with electrical slip rings and positioning sensors for electronic feedback and position monitoring

Applications

• Kaplan turbines
• Adjustable propeller blade turbines
• Variable pitch turbines

Technical highlights (summary)

• Hydrodynamic long-life seal technology suitable for continuous duty
• High-pressure, multi-passage designs for complex fluid routing
• Low rotational torque design optimized for continuous operation and high-speed environments
• Engineered for direct integration into existing turbine equipment

Additional features

• High-speed sealing technology rated for 3000+ RPM
• Corrosion-resistant materials and optional platings
• Options for integrated electrical slip rings and positioning sensors for combined fluid and electrical transfer plus feedback

Caractéristiques / spécifications techniques

• Seal technology: Hydrodynamic, long-life, maintenance free
• Design options: Multiple passage / high-pressure configurations
• Rotational performance: Low rotational torque; suitable for continuous duty and high RPM (3000+ RPM capable)
• Materials: Corrosion-resistant materials with optional platings
• Integration: Options to include electrical slip rings and positioning sensors for combined fluid and electrical transfer and feedback
• Primary applications: Blade pitch control for Kaplan and variable-pitch turbines