Search results

Maintain the machine lubrication system for troublefree operation

Proper maintenance of your machine's lubrication system is critical for safe and trouble-free operation of equipment. This article reviews the proper oil choice, flushing, startup and shutdown processes.

Use these general instructions to replace a hydraulic cylinder

This article contains general replacement instructions for hydraulic cylinders. In the absence of specific OEM or mill instructions, follow these instructions which include safety, preparation, cylinder removal/installation and completing actions.

Chemical cleaning advisory services save time and shorten outages

Valmet's chemical cleaning advisory services provide a safe and time saving chemical cleaning plan for your boiler. We can also handle the complete job from start to finish, providing shorter shutdowns of your boiler and cleaner boilers when we are finished.

Air guide maintenance guarantees trouble-free even operation

The air guide is common on paper machines, where the machine clothing is a continuous belt. Proper care and maintenance of the air guide is essential to make sure that the guide works evenly and trouble-free.

Reel safety requires extreme caution and good design features

Reeling is a high-speed, potentially dangerous process. Safe operation of the reel requires alertness on the part of all operating and observing personnel. This article lists general safety recommendations when in or near the reel.

Reel water jet turnup improves reliability and safety, case study

The use of water jet turnup systems at paper, board and tissue reels is growing. Safety, reliability and turnup efficiency are improved while bottom losses are reduced.

VacRoll suction holes and grooves should be cleaned regularly

VacRoll suction holes and the grooves of all rolls should be cleaned regularly, as they may get completely clogged due to web moisture, particularly at the start of the dryer section. Bearing housings also need attention. Proper handling of the rolls is also important.

Differential drive inspection - clutch, PIV, bearings and gears

The differential drive supplies power to the individual machine sections, and maintains a constant preset speed between those sections. The slightest speed difference between sections can result in a sheet break and lost production. Knowing the drive components and what to look for helps in preventive maintenance.

Never straighten bent reel spool journals - safer to replace them

Reel spools carry more load for their size than any other roll in the paper mill. Bent journals can break, causing the log to fall from the reel or storage reels onto the floor and bump into equipment and personnel.

Wet streak caused by corrosion of roll shell, case study

A wet streak leads to combined investigation by mill personnel and Valmet roll specialists. A suction roll cover is removed and analyzed, after which a metallurgist inspects the roll. The mill mechanic provides a key insight...