long stroke hydraulic cylinder

Multi-stage long-stroke hydraulic cylinders deliver exceptional extension capabilities in compact retracted spaces, achieving stroke lengths of 3-20 meters while maintaining collapsed lengths 50-70% shorter than equivalent single-stage cylinders. These telescoping actuators feature precision-machined nested stages (typically 3-8) with hardened chrome-plated rods and wear-resistant bronze guides for smooth sequential deployment. Their synchronized stage movement ensures uniform load distribution, handling forces up to 500 tons in heavy-duty configurations. The cylinders incorporate dual-seal systems (primary polyurethane + secondary fluorocarbon) to prevent fluid contamination during deep retraction, while integrated cushioning valves control final-stage deceleration within ±2% speed accuracy.  

 

Designed for harsh environments, special versions feature stainless steel construction for offshore applications, high-temperature seals (150°C continuous) for foundry equipment, and corrosion-resistant coatings for chemical exposure. Advanced models include position feedback sensors on each stage and IoT-enabled condition monitoring to predict seal wear and alignment issues.  

 

Critical applications include:  

• Dump truck bed lifting (withstanding road vibration and shock loads)  

• Aerial work platforms (meeting ANSI/SAIA A92 safety standards)  

• Dam gate positioning (synchronizing multiple cylinders within 5mm tolerance)  

• Solar tracker adjustments (handling wind-induced cyclic loads)  

• Oilfield pumping units (5+ million cycles/year reliability)  

 

These cylinders reduce energy consumption by 30-40% compared to equivalent linear systems through optimized flow paths and regenerative circuits. Their space-saving design enables installation in constrained areas where conventional cylinders cannot operate, while maintenance-friendly features like replaceable individual stages minimize downtime. The combination of extreme reach, compact storage, and robust performance makes them indispensable for mobile equipment and industrial systems requiring long, controlled linear motion.