- Distributed control system
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Industrial applications
- For Pulp
- For Board & Paper
- For Tissue
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For Energy
- Multifuel and biomass
- Waste-to-energy
- Combined heat and power
- Combined cycle and gas
- Hydro
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Applications
- Turbine automation
- Process optimization
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- Fuel management
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Performance monitoring and reporting
- Plant operation
- Boiler performance
- System monitoring and reporting for turbines
- Steam turbine performance
- Gas turbine performance
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- Pumps and fans performance
- Heat exchanger performance
- Operation point deviation
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- Boiler life
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- For Marine
- For Alternative fuels
- Quality management
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Analyzers and measurements
- Inline sensors
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Analyzers
- Brown Stock Quality Analyzer
- Chip 'n' Bark Moisture Analyzer
- Recovery Ash Analyzer
- Recovery Liquor Analyzer
- Dirt Count Analyzer
- Fiber Image Analyzer
- Fiberline Analyzer
- Paper Lab
- MR Moisture Analyzer
- Pulp Expert
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- Retention Measurement
- Stand-Alone Retention Control
- Wet End Analyzer
- Corrosion Reduction Analyzer
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Automation services
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- Quality control system (QCS)
- Measurements
- Caliper
- Optical Caliper Measurement
Valmet IQ Optical Caliper Measurement
The accurate scan averages and high-resolution CD profiles measured by Valmet IQ Optical Caliper Measurement (IQ Optical Caliper) provide a solid foundation for Valmet’s cross direction caliper controls. The paper web is stabilized to the reference plate and there is none of the sheet pinching effect experienced with conventional contacting caliper measurements. These results in improved runnability as there are no contacting parts that could interact with sheet impurities in a way that would lead to holes or sheet breaks.
Features
IQ Optical Caliper combines two accurate measurement techniques. The magnetic principle is used to measure the distance of the laser to a reference plate while the non-contacting laser triangulation optical principle measures the distance to the paper surface. Paper thickness is reached by subtracting these individual measurements from each other. The combination of the two principles in this design eliminates errors introduced by normal mechanical tolerances involved in scanning the sensor across the sheet.
The paper web is stabilized to the reference plate using the Coanda effect. This prevents passline variations and aerodynamical effects from disturbing the accuracy even for the highest machine speeds.
An automatic standardization and calibration procedure periodically adapts the sensor’s calibration parameters to the environmental conditions and, in that way, guarantees long term accuracy and reliability.
Benefits
- Sub-micron caliper measurement accuracy at the highest resolution and scanning speed lead to more accurate and stable onsheet measurement and more precise control of MD and CD properties.
- There is no pinching effect to cause holes, sheet breaks or marking due to sheet impurities or high nip force. This leads to improved production line runnability and reduced waste.
- Passline handling combined with the simple and robust measurement principle leads to improved profile accuracy over a wide range of paper grades. These include highly calendered and very fast machines where conventional contacting caliper measurement has been challenging.
- Even caliper improves reel build and winder and press room runnability.