Heavy-Duty Marine Rotary Union for Offshore & Shipboard Hydraulic Systems

Description

Built for the Harshest Marine Environments Rotary Union 

A Marine Rotary Union (also known as a fluid rotary union or swivel joint) is a rotary interface that enables the transfer of fluids or gases under pressure between stationary and rotating equipment. These unions are specifically engineered to withstand harsh marine environments, offering corrosion resistance, high-pressure ratings, and long-term durability. The Marine Rotary Union is engineered for reliability and longevity in the most demanding marine applications. It is engineered for reliability and longevity in the most demanding marine applications. Whether installed on offshore oil rigs, deep-sea winches, or hydraulic systems on naval vessels, our rotary unions are designed to handle high pressures, saltwater corrosion, and constant rotation—all while maintaining a leak-free seal. Our rotary unions handle high pressures, resist saltwater corrosion, and endure constant rotation while maintaining a leak-free seal on offshore oil rigs, deep-sea winches, and naval vessel hydraulic systems.

• 100% Seawater-Resistant Construction
• High-Pressure Rated (Up to 10,000 PSI)
• Compatible with Hydraulic Oil, Air, Water, Coolant, and Grease
• Zero Maintenance Options Available

Key Features of Offshore and Marine Rotary Union

Corrosion-Resistant Materials

Crafted from marine-grade stainless steel, anodized aluminum, or nickel-plated brass, every unit resists rust, galvanic corrosion, and wear caused by salt spray or seawater immersion.

Multi-Passage Designs

Available in single-e-,dual-l–, and multi-channel configurations, our rotary joints support simultaneous transmission of hydraulic fluid, pneumatic air, coolant, or fiber-optic/electrical signals when combined with slip rings.

Leak-Proof Dynamic Seals

Fitted with high-performance mechanical seals and labyrinth sealing systems to ensure zero leakage during high-speed rotation or pressure spikes.

Customizable Port Sizes & Threads

Supports NPT, BSP, and SAE port standards, with bore sizes ranging from ¼” to 4”, ensuring easy integration into marine piping systems.

Long Life Bearings

Integrated ceramic or carbon steel bearings offer ultra-low torque operation and reduce rotational wear—ideal for continuous duty on marine cranes, cable reels, or propulsion systems.

Common Applications of Offshore and Marine Rotary Union

1. Offshore Oil & Gas Platforms

Marine rotary unions are critical components in hydraulic umbilicals, blowout preventers, and turret swivels, allowing reliable fluid transmission even under continuous rotation and wave-induced motion.

2. Ship Deck Machinery

Rotary joints are frequently integrated into deck winches, anchor handling systems, and crane slewing drives, where they rotate under load while transferring high-pressure oil or air.

3. Underwater ROVs & AUVs

Remotely operated vehicles (ROVs) and autonomous underwater vehicles (AUVs) rely on miniature rotary unions for power, fluid control, and sensor signal transfer, ensuring underwater mobility and precision.

4. Marine Wind Turbines

In offshore wind farms, rotary unions allow yaw rotation and hydraulic pitch control while maintaining continuous fluid flow and signal connection from fixed to rotating sections.

5. Tugboats & Ferries

Hydraulic propulsion, rudder control systems, and winch operations on tugboats and ferries depend on durable marine rotary joints that offer long service life and low maintenance.

Why Choose Our Offshore and Marine Rotary Union?

Investing in our rotary unions means choosing reliability, efficiency, and innovation. With a proven track record in the marine shipping industry, we ensure that your operations run smoothly while adhering to the highest safety standards.

Proven Industry Experience

Trusted by leading marine, offshore, and defense organizations worldwide.

ISO 9001 Certified Manufacturing

Ensures consistent quality and reliability in every product.

Application Engineering Support

Expert assistance in selecting and customizing the right rotary union for your needs.

Global Service Network

Comprehensive support for installation, maintenance, and troubleshooting.

Enhance your marine shipping operations with our state-of-the-art rotary unions. Designed for durability and efficiency, our products are tailored to meet the unique challenges of the maritime environment. Contact us today to learn more about how our solutions can benefit your business!

FAQ of Offshore and Marine Rotary Union 

Q1: What media can this rotary union transfer?

A: It is compatible with seawater, hydraulic oil, air, coolant, and grease. Multi-channel models can support simultaneous media.

Q2: Can it handle high RPMs?

A: Yes. Standard models support up to 500 RPM, while high-speed variants can reach up to 1500 RPM with custom sealing.

Q3: Is it customizable for my vessel’s system?

A: Absolutely. We offer custom port sizes, materials, and channel configurations to fit your marine system requirements.

Q4: Does it support signal transmission too?

A: Yes. We can integrate electrical slip rings or fiber optic rotary joints for combined fluid and signal transfer.

Q5: Is it certified for offshore or military use?

A: Yes. Our products meet DNV, ABS, and ISO 9001 standards and can be manufactured under MIL-SPEC requirements.

📞 Contact Us for Custom Orders or Technical Support

Tianjin Keypower Hydraulic Company Limited
📍 Address: Tianjin City, China
📧 Email: sales@dannhydraulic.com
📞 Phone: +86-15122592153
🌐 Website: dannhydraulic.com

🛒 Order Now – Power Your Marine Operations with Confidence

Don’t compromise your shipboard system’s performance. Choose the KM-RU1000 Marine Rotary Union for unmatched durability, leak-proof performance, and certified reliability in every ocean condition.