Maintenance cranes

• Cranes needed for process equipment maintenance are typically wet end cranes, coater cranes, deinking plant cranes, vacuum pump maintenance, mezzanine floor cranes and hoists, roll grinding workshop cranes, converting plant cranes and hoists, and workshop cranes.
• The wet end paper machine crane is busiest when the plant is being built.
• During maintenance stops of the paper machine, quick and accurate movements are needed when changing the press or dryer section rolls of the paper machine.
• A humid and corrosive environment sets high requirements for the protection of all electrics and structures.
• Intelligent load handling technology, sway controls, protected areas and other useful features are optional.

Wet End Crane Functions

The wet end crane has multiple purposes, ranging from paper machine maintenance to working as a dry end crane back-up. It is used to erect the paper machine, to aid in machine roll maintenance and to handle paper machine parts. Safe handling of the heavy press rolls and reliable start-up after standstills in warm, humid and chemically aggressive environments require a particular type of crane design.
Intelligent load handling technologies (optional) in the crane make driving easy and prevent load sway. Reduction of handling time during hectic paper machine maintenance stops is one of the goals in using ESR (Extended Speed Range) and sway control. Restricted areas can be applicable.
The wet end crane can also be used as a back-up for the dry end crane, and thus a power supply is needed for a slewing spreader.