Custom Hydraulic Cylinders for Metallurgical & Heavy Machinery

Tianjin Uranus Hydraulic Machinery Co., Ltd. provides custom hydraulic cylinders for the marine and shipbuilding industry, including deck machinery, steering gear, stabilizers, hatch covers, and cargo handling equipment. With over 30 years of experience and recognition as a national small giant enterprise, we design cylinders that meet classification society requirements (DNV, ABS, Lloyds, CCS) for safety and reliability in the harsh marine environment. Our custom cylinders for steering gear are critical components that must provide precise, responsive control of the rudder. They are typically double-acting and feature integrated lock valves to prevent rudder movement in case of hydraulic failure. We use duplex stainless steel for the rod and bronze for bearings to resist seawater corrosion. For a Chinese shipyard, we supplied custom steering cylinders for a 300,000 DWT VLCC. The cylinders have a bore of 250 mm, a stroke of 800 mm, and operate at 210 bar. They passed all classification society tests, including pressure testing and function testing. For stabilizer fins, our custom cylinders position the fins to reduce ship roll. These cylinders must be compact and powerful, with fast response times. We use high-strength aluminum bronze for the cylinder body to reduce weight, and the rod is made from precipitation-hardened stainless steel. For a European yacht builder, we provided custom stabilizer cylinders for a 50-meter superyacht. The cylinders achieve full stroke in under 2 seconds and have position feedback for precise control. For hatch covers on bulk carriers and container ships, we supply custom cylinders that operate in a highly corrosive environment with exposure to salt spray and seawater. We use 316L stainless steel for all wetted parts, or we apply a multi-layer paint system over carbon steel. The cylinders are equipped with integrated velocity fuses to prevent uncontrolled lowering of the heavy hatch covers. For a Korean shipbuilder, we supplied 30 custom hatch cover cylinders for a fleet of container ships. The cylinders have been in service for over 8 years with no reported failures. Our manufacturing process for marine cylinders includes strict material traceability, weld procedure qualification, and third-party inspection when required. We provide a comprehensive documentation package that includes material certificates, test reports, and a maintenance manual. Our after-sales support includes spare parts and technical assistance through our global network. For a custom cylinder for your marine or shipbuilding application and a quote, please contact us.