This lifting cylinder series is the main drive element of the hydraulic jacking system on jack-up offshore platforms. Working in concert with the ring beam and pin locking system, it drives the platform step by step up or down along the leg chords, enabling safe elevation from a floating transit draft to the operating air gap and back. Featuring an ultra-high pressure, large-bore (up to 700 mm), medium-stroke design, each cylinder delivers thrust capacities of tens of thousands of kN. When deployed in groups, they provide the massive lifting force and holding capability required by jack-up platforms ranging from 300 to 1,500 ft. With an ultra-strong salt-spray-resistant ceramic coating, zero-leakage long-life sealing, and externally mounted, easily serviceable displacement sensors, the cylinder operates reliably for extended periods in extreme marine environments — salt spray, high humidity, splash, and intense UV — ensuring safe and stable platform jacking throughout the entire operational cycle.

This pin cylinder series is specifically designed for the jacking system of jack-up offshore platforms. As the core actuator of the ring beam pin-locking mechanism, it drives high-strength alloy pins to precisely engage or disengage the locking holes on the leg chords, enabling reliable staged mechanical locking and unlocking during platform elevation. This ensures safe standing and smooth jacking in water depths up to several tens of meters. Featuring an ultra-strong salt-spray-resistant ceramic coating, a highly reliable zero-leakage sealing system, and an optional built-in displacement sensor, it operates long-term with minimal maintenance in extreme marine environments — salt spray, humidity, splash, and intense UV — preventing any locking failure due to corrosion or leakage over an entire platform operational cycle.