Hydraulic Rotary Couplings in marine hydraulics enable fluid transfer between stationary and rotating parts. They ensure leak-free operation under high pressure and dynamic conditions. These couplings are essential for steering, propulsion, and other hydraulic systems on ships.

Size: 1/2" to 2" nominal bore

Grade: Standard, high-pressure, corrosion-resistant

Viscosity Range: ISO VG 32 to VG 68

Buoyancy: Neutral to slightly positive, depending on material

Material: Stainless steel (316/304), carbon steel, or brass with nitrile/FKM seals

Pressure Rating: Up to 350 bar (5,000 psi)

Temperature Range: -20°C to +120°C (-4°F to +248°F)

Rotation Speed: Up to 500 RPM (varies by size and pressure)

Flow Rate: 20 to 200 L/min (5 to 53 GPM)

Connection Type: Threaded (NPT, BSP), flanged, or SAE ports

Seal Type: Lip seals, O-rings, or mechanical seals for high-pressure applications

Corrosion Resistance: Saltwater-resistant coatings or stainless steel construction

Compliance: ISO 4401, SAE J518, or DIN/EN standards

Yes, Hydraulic Rotary Couplings and Marine Hydraulics typically comply with maritime standards such as ISO, DNV, ABS, and other relevant industry certifications.