This heave compensation cylinder is the critical dynamic balancing element for the suction tube system of trailing suction hopper dredgers (TSHD). Installed between the hanger frame and the draghead, or within a dedicated compensator mechanism, it compensates for the vessel's heave motion induced by waves, maintaining a constant contact force between the draghead and the seabed — preventing lift-off or excessive downforce. Featuring a high-speed low-friction design and working in tandem with an accumulator system for active or passive heave compensation, the cylinder smoothly extends and retracts at typical wave frequencies (0.05–0.5 Hz) with instantaneous speeds up to 0.5 m/s. The long-stroke, high-rigidity guiding system and specialized waterproof sealing enable maintenance-free operation in the deep-sea, high-salinity, high-vibration dredging environment, dramatically improving excavation efficiency and extending draghead service life.

This hanger cylinder is the core deployment actuator for the suction tube system on trailing suction hopper dredgers (TSHD). Mounted between the vessel’s gantry and the suction tube frame, it extends and retracts the hanger, indirectly controlling the depth of the trailing draghead and suction pipe into the water for digging, or lifting them clear for sailing. During dredging, the cylinder must steadily withstand massive tensile forces to keep the draghead firmly on the seabed while the vessel rolls, pitches, and pitches in waves. When the gear is stowed, it must lock securely to prevent accidental deployment. Featuring a high-tensile, long-stroke design, an integrated wave-compensation accumulator interface, counterbalance valve, and specialized watertight sealing, it operates maintenance-free for extended periods in the deep-sea, high salt-spray, and high-vibration environment.

This mud door cylinder series is the core actuator of the bottom discharge system on trailing suction hopper dredgers (TSHD). Mounted in pairs along the hopper sides or at the conical bottom doors, these cylinders open and close the mud doors to rapidly dump the dredged material and ensure a watertight seal during navigation. With a heavy-duty design delivering up to 2,355 kN of pulling force per cylinder, they securely lock the doors against the enormous static head of thousands of tonnes of mud slurry, preventing leakage during transit and avoiding jamming during discharge. Combining high-strength anti-fatigue construction, multi-stage waterproof sealing, and integrated safety valve packages, the cylinders operate reliably for decades in the aggressive conditions of mud, saltwater, high humidity, and frequent cycling. An optional displacement sensor enables real-time door position monitoring.

This overflow cylinder is specifically designed for the adjustable overflow system on trailing suction hopper dredgers (TSHD). It raises and lowers the overflow weir or pipe via a wire rope or direct linkage, precisely controlling the overflow height within the hopper to optimize loading efficiency for different soil types while maintaining safe sailing draft. Featuring a high pulling force (up to 900 kN) and a long stroke (up to 6,000 mm), the cylinder provides smooth, steady motion and zero-leakage performance under the harsh conditions of mud, frequent adjustment, and saltwater spray. With integrated multi-stage waterproofing and corrosion protection, it meets IHO and classification society requirements, delivering safe, efficient, and long-life level control power for dredgers.

This split barge cylinder is the core actuator of hydraulic split barges (split-hull hopper barges). Mounted in pairs on either side of the central hinged axis, these cylinders pull or push the two hull halves to open and close, enabling rapid discharge of dredged material and secure closure for transit. The cylinder features an ultra-large bore, a robust tension-rod design, and can sustain tens of thousands of kN of locking force. Even under a full load of mud, sand, and wave impact, it rigidly holds the hull closed, ensuring safe navigation and dumping. With special seawater-resistant coatings, watertight sealing, and built-in cushioning, it operates reliably for decades in the harsh conditions of port channels, coastal reclamation, and inland dredging, without corrosion or leakage.

This tripper luffing cylinder series is designed for the tail car (tripper) luffing mechanism of large stacker reclaimers. Mounted between the tripper boom and the traveling gantry, it hydraulically raises and lowers the tripper to switch between stacking and reclaiming modes — tilting up to discharge material onto the boom belt during stacking, and lowering to allow material from the pile to flow onto the ground conveyor during reclaiming. With a heavy-duty high-thrust design, medium-to-long stroke, specially anti-corrosion guide bushing system, and integrated safety lock, it reliably withstands outdoor rain, snow, coal dust, and ore fines, providing stable luffing support for stacker reclaimers in bulk ports, power plants, and steel mills.

This belt tensioning cylinder series is designed for large stacker reclaimers, bucket-wheel stacker reclaimers, and belt conveyor systems. Installed on the take-up trolley or tension pulley, it adjusts and maintains the belt tension by hydraulic push or pull force. With a long-stroke, high-pressure locking design integrating low-friction seals and a counterbalance/hydraulic lock valve, it remains reliably locked in position for extended periods, compensating for temperature changes and material surges. Enhanced dust-proofing and anti-corrosion features make it ideal for continuous coal, ore, and bulk material handling in ports, power plants, and mines.

This telescopic cylinder series is the core actuator for the boom extension and retraction system of container reach stackers. Mounted between the base boom and successive telescopic sections, it hydraulically extends and retracts the boom in stages, rapidly adjusting the working radius and lifting height — making it the key power source for heavy container stacking and handling. Featuring a multi-stage telescopic heavy-duty design that achieves an ultra-long stroke (up to 8,000mm) from a compact installed length, combined with low-friction sealing, a specially anti-corrosion guide bushing system, and an integrated safety valve package, it delivers smooth, reliable, zero-drift motion under high-frequency cycling, heavy offset loads, port salt spray, and dusty conditions.

This luffing cylinder series is the primary actuator for the boom pitch system of container reach stackers. Mounted between the chassis pivot and the boom, it hydraulically pushes and pulls the entire boom to pivot around its base hinge through a large angular range, directly determining the machine's maximum working radius, lifting height, and rated capacity. Featuring a heavy-duty design with high thrust and medium-to-long stroke, low-friction sealing, a specially anti-corrosion guide bushing system, and an integrated safety valve package, it delivers smooth, reliable, zero-drift pitch support under full-load high-frequency cycling, port salt spray, and dusty conditions — providing the core power guarantee for heavy container stacking and handling.

This steering cylinder series is purpose-built for the chassis steering system of heavy-duty reach stackers. Mounted between the steering axle and the steering linkage, it hydraulically assists the wheels to precisely angle, enabling nimble maneuvering and accurate positioning in tight port yards, container terminals, and freight depots. With a high-strength compact structure, ultra-low-friction sealing, and specially anti-corrosion guide bushing, it delivers light, precise, stick-slip-free steering response under full-load, high-frequency steering cycles, port salt spray, and dusty conditions, significantly reducing operator effort and ensuring safe, efficient container handling and stacking.

This tilt cylinder series is the core actuator for the mast pitch system of empty container handlers. Mounted in pairs between the outer mast and the chassis pivot points, it hydraulically pushes and pulls the entire mast to tilt forward and backward around the base hinge, precisely adjusting the fork or spreader angle for rapid container engagement, stable carrying, and accurate stacking. With a bidirectional heavy-duty design, low-friction sealing, and integrated safety valve package, it delivers smooth, controlled tilting motion and secure locking under high-frequency cycling, port salt spray, and dusty conditions, significantly improving stacking efficiency and operational stability.

This lifting cylinder series is the core power element of the mast system on empty container handlers. Mounted between the outer and inner mast sections, it hydraulically raises and lowers the forks or spreader, providing the primary lifting force for stacking and handling empty containers. Designed with a multi-stage telescopic structure to achieve an ultra-long stroke (up to 9,500 mm) from a compact installation height, it integrates low-friction sealing, cushioning, and a safety locking valve package. Under high-frequency heavy loads, port salt spray, and dusty conditions, it consistently delivers smooth, reliable, zero-drift lifting performance, significantly improving stacking efficiency and operational safety.