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
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
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