Valmet LC: Optical Low Consistency Measurement for Pulp and Paper Process Optimization

The Valmet Optical Low Consistency Measurement (Valmet LC) is a high-resolution consistency transmitter designed to deliver exceptionally precise measurements in the 0–2% consistency range, making it ideal for advanced control of critical processes in the pulp and paper industry.

Key Features and Benefits

• Supreme Accuracy: Measures consistency with a sensitivity of ±0.001%, using light polarization and attenuation. This optical method ensures reliable readings regardless of pulp color, brightness, or ash content.
• Low Maintenance: Equipped with sapphire glass windows for durability and automatic flushing to keep the sensor clean. The system includes self-diagnostics that monitor sensor health and alert maintenance teams if contamination or blockage is detected.
• Simple Calibration: Requires only one lab sample for setup. Up to four recipe profiles can be stored in memory for flexible operation.
• Connectivity: Comes standard with HART® communication, with Profibus PA available as an option for seamless integration into automation systems.

Sustainability and Process Efficiency

Valmet LC supports mills in meeting environmental goals by:

• Reducing water consumption and enabling closed-loop processes
• Enhancing control of disc filters, presses, and headbox consistency
• Improving runnability and reducing process variability
• Detecting unwanted materials in purified circulation waters
• Supporting total consistency measurement on slower machines with stable ash content

Versatile Applications

Valmet LC is widely used in:

• Recycled pulp lines
• Screening control for uniform drainage and improved product quality
• Effluent monitoring to manage wastewater systems
• Molded pulp packaging production
• Feed consistency control and filtrate quality measurement
• Headbox and white water consistency management

Technology That Adapts to Your Process

The Valmet LC’s optical measurement method is unaffected by variations in pulp characteristics, making it a robust solution for:

• Recycled fiber processes
• Wet end process control
• Low consistency refining
• Closed-loop water systems

Valmet LC is a trusted solution for mills seeking high-resolution consistency control, minimal maintenance, and sustainable process improvements. Its robust design and advanced optical technology make it a cornerstone of modern pulp and paper process automation.