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DN Pipeline Rotary Joint
Technical Specifications
The DN Pipeline Rotary Joint is a precision-engineered swivel connection designed for rigid pipelines to transfer fluid media under dynamic conditions. Its internal bearing/ball mechanism ensures smooth rotation with high load capacity, while hardened raceways and multi-material sealing options deliver extended service life. Widely applied in metallurgy, petrochemicals, rail transport, marine, and rubber industries.
Rotation Mechanism
High-precision ball/bearing support (rotation torque <5N·m)
Hardened raceways (HRC≥60) with 500,000+ rotation lifespan
Radial load capacity: 30% of pipeline pressure rating
Sealing System
High-temp: FKM (-20°C~200°C)
Standard: NBR (-30°C~120°C)
Chemical-resistant: PTFE
Multi-stage sealing (primary + wiper seals)
Material options:
Flow Optimization
Polished flow path (Ra≤0.8μm)
Pressure drop <0.2MPa @30m/s flow velocity
| Category | Standard Range | Special Capabilities |
|---|---|---|
| Pressure | 0.1-45MPa | 45±5MPa pulsed pressure @10Hz |
| Temperature | -30°C~150°C | 180°C short-term (≤30min) |
| Speed | 0-80rpm | 120rpm peak (≤5min) |
| Sizes | DN10-DN500 | Custom diameters available |
| Viscosity | 5-5000cSt | ≤15% solid particles by volume |
Metallurgy
Continuous casting cooling systems (3+ years @24/7 operation)
Rolling mill hydraulics (±2% pressure stability)
Energy Sector
Offshore wind transformer oil cooling (saltwater-resistant)
Drilling mud transfer (20% sand tolerance)
Specialized Uses
Rail tanker loading (ATEX explosion-proof)
Chemical transfer (pH1-14 corrosion-resistant variants)
High-speed (>50rpm): Angular contact bearing type + forced lubrication
Low-temp (<-20°C): Cryogenic seals (silicone + specialty grease)
Food-grade: 316L stainless steel + EPDM seals
Initial grease replacement after 500 operating hours
Seal inspection every 2,000 hours
Integrated monitoring ports (vibration/temperature sensors)
*Certifications: ISO 14373 (welding), API 607 fire-safe. FEA stress reports available for extreme conditions. Multi-passage designs recommended for ultra-high pressure/low-temperature applications.*
