Roll upgrades for board and paper machines

Upgrade services improve roll performance

Upgrade services provide improved roll performance and productivity by applying new innovations into your existing roll base. Valmet modular maintenance solutions such as upgrade services are especially targeted for critical process rolls e.g. deflection-compensated rolls and suction rolls in board and paper making.

Better machine runnability

Improved machine efficiency

Extended machine time

Reduced energy consumption

Modular maintenance solutions

Valmet's modular service solutions consist maintenance, reconditioning and upgrade services. Roll upgrades for existing components with modern features enhance performance and productivity in board and paper production.

Your nearest service center can provide proper recommendations on which service module is best for you.

Up to 50% water savings with roll upgrade

One example of upgrades is Suction Roll Upgrade Seal Flow. With Seal Flow, it is possible to achieve savings of up to 50% on the water used in the showers (calculated for 9 meter shell length).

Comparison	Water consumption l/s/m	Water consumption m³/y	Annual water cost
Original	0.22	59,900	EUR 59,500
Seal Flow	0.11	29,250	EUR 29,950
Potential annual savings:	EUR 30,000

Suction roll upgrades

Valmet Suction Roll Upgrade Seal Flow

Uniform axial seal lubrication
Minimized re-wetting
Up to 50% less water consumption
Up to 30.000 m3 annual water savings
Extended axial seal life

+1000 deliveries

Valmet Suction Roll Upgrade Lock Seal

Reduced power consumption
Longer axial seal lifetime
Longer shell lifetime
Lower axial seal noise
Improved moisture profile and less rewetting
Up to 10% decreased power consumption
CO² savings 0,14 kg/ton

+900 deliveries

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Valmet Suction Roll Upgrade Shell
Flow H

Cleaner shell through holes
Maximum dewatering capacity
Improved CD moisture profiles
Up to 85% less water consumption
Up to 6.000 m³ annual water savings when using for 10 min time period every 8 h

+100 deliveries

Valmet Suction Roll Upgrade Edge Blow

Less web breaks
Improved machine efficiency
Cleaner shell edge areas
Cleaner felt edges
More accurate vacuum width adjustment
0,2% more production (+1223 ton/a.)
Up to 250 t CO² savings/year due broke reduction

+200 deliveries

Valmet Suction Roll Upgrade Edge Light

Easy vacuum zone (CD & MD) adjustment
Improved runnability
Improved energy efficiency
Maximized dewatering

+25 deliveries

Valmet offline axial seal wear and leakage test

Measurement of axial seal loading hose air volumes which correlates axial seal wear amount
Increased run cycle based on actual seal wear
Ideally timed replacement of suction roll axial seal
Leakage of loading hoses can be detected
Prevented unplanned maintenance
No high investment needed for new axial seal system

+ 10 roll measurements

Deflection-compensated roll upgrades

Oil viscosity upgrade for energy savings

Energy savings up to 14%
Improved oil condition
Optimized roll internal cooling capacity to secure long cover lifetime
Unnecessary roll internal cooling shower and umping capacity removed
Up to 14% less power consumption
CO² savings 1,2 kg/ton

+10 deliveries

Cooling and lubrication upgrade

Optimize roll internal cooling capacity to secure long cover lifetime
Remove unnecessary roll internal cooling shower and pumping capacity

+10 deliveries

Double oil circulation

Additional cooling capacity allows increased machine speed
Uniform temperature and nip profiles

+80 deliveries

Plain bearing lubrication upgrade

Prevents corrosion and the bearing from seizing to the center shaft or the pedestal
Improved lubrication due to grooved plain bearings
Longer lifetime for bearings
Guarantees easier and cheaper maintenance

Plain bearing lubrication +10 deliveries

References and articles

Pick-up roll running time extended from four to 14 months

Hamburger Hungaria was troubled by short running times, an unscheduled downtime and extensive maintenance on its PM 7 pick-up rolls. Since the installation of a new Valmet pick-up roll and roll upgrades, the running time has more than tripled.

Roll change interval increased from one to two years with Lock Seal

The Adolf Jass Fulda mill chose the Lock Seal axial seal technology developed and patented by Valmet. Nowadays it is a standard solution in Valmet's high-speed machines. Each existing roll including a competing product can be modernized with Valmet Lock Seal.

Mule-Hide Manufacturing Co. saves substantial amount of time with Suction Roll Upgrade Edge Light

Running two different sheet weights on 1PM, the mill noticed that when changing weights, the sheet tracked to the far edge of one side of the suction drum roll. After taking hours to adjust the end deckle seals, the mill was looking for a time-saving solution that will increase production.