JL/SL Series
Melcal Marine knuckle box boom pedestal marine cranes, JL/SL SERIES are reliable and effective cranes for general cargo handling and service onboard ships and offshore units.
Tailor made to your requested specifications, in different boom lengths and lifting capacities for different sea state working conditions. All JL/SL SERIES cranes can be equipped with different accessories and class certified by all leading classification societies.
For more information or to submit a crane enquiry fill in our on-line request information form or contact us.
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- 360° rotation by means of precise slewing ring
- Steel structure made of certified steel S355 & S690
- Working temperature range from -20°C to +40°C
- Precise step less speed control
- Simultaneous operation of 2 or more functions
- Strong basement ready for mounting or welding on vessel’s main steel structure
- Emergency stop device
- All piston cylinder rods made with Nikrom 350
- Stainless steel pipes & nuts
- Stainless steel grease fittings
- Bushes made of self lubrificating bronze
- Pins treated with self lubricating and anti corrosion material
- Emergency hand operated pump
- Dead man type lever controls
- Load limiting system
- Load Holding Valves
- Slew Fail Safe Brakes & Load Holding Valves
- Standard Melcal Marine Treatment
- Full set of documentation and operation manuals
- Spare filters for one year operation
- Power Units w/ oil coolers (electro-hydraulic or diesel hydraulic)
- Constant tension systems
- Certification for lifting of personal and man riding winches
- Radio or cable remote control systems
- AOPS (Automatic Overload Protection Systems)
- Special steel for low working temperatures (-40°C)
- ATEX packages & certification
- Load indicator systems
- MOPS - Manual Overload Protection System
- AOPS - Automatic Overload Protection System
- Flood lights
- Warning & working lights
- Operator cabin (with A/C)
- Centralized greasing system
- Extended pedestal height and many other upon request
- All functions are adjusted to permit pressure with relief valves
- Main overpressure valve for the safety of the whole hydraulic system
- Hydraulic overload device/ load limiting device fitted so that all crane functions stop when boom structure is overloaded. When crane is blocked, the only movement allowed by the release valve, is the extension in movement reducing in this way the movement that has caused the blocking
- Luffing cylinder/s equipped with over centre valves
- Slewing gearbox equipped with fail safe disc brakes and brake valves, to prevent any overload due to the horizontal forces, the breaks are spring operated and pressure released
- Winch equipped with fail safe disc brakes and brake valves, the breaks are spring operated and pressure released
- Swivel hook with bearing complete with safety latch
- Distributor control valve block, with dead man’s type levers for an automatic return to neutral position
- Emergency hydraulic stop valve
- Emergency hand operated pump
- Boom angle indicator
- Visual & audible warning alarms