Valmet OC introduces three new models for applications

25 Oct '17

3 min read

Courtesy: Valmet

Valmet Optical Consistency Transmitter (Valmet OC) has introduced three new expanded applications which include measurement method of eucalyptus pulp, old corrugated containers (OCC) and recycled fibres (RCF), chemical pulps. Valmet OC has gained a deserved reputation for accuracy, reliability and ease of installation since its introduction.

Eucalyptus pulp has different optical properties compared to other pulps; thus leading to the design of the special optical sensor and measurement method. A typical application is the control of low consistency-refiner feed consistency, where improved refiner freeness results and reduced specific energy consumption is seen. Also, results with the new transmitter in several commercial installations have been successful where competing inline optical transmitters have failed.

OCC and RCF processes are a challenge for any measuring device. The Valmet OCR features a robust probe to survive the harsh physical environment and a measurement that tolerates the ash variations that prevent the use of other inline optical consistency transmitters.

The Valmet OC features a sapphire window to withstand chemicals used in chemical pulping. All the three transmitters have passive measuring probes, connected through fibre optic cable to the measuring unit, that are temperature and vibration resistant as well as self-cleaning even in the demanding environment of recycled fibre processing. Offering simple and low cost installation, the 12 millimetre diameter probe with ball valve also makes insertion and removal possible without special tools or process stop required.

"Valmet's continuous development expands reliable consistency measurement applications. Sharing the same basic components and modules, each new transmitter has a probe and total consistency measurement method optimized for use in special process environment i.e. recycled fibre," explained Heikki Föhr, product manager at Valmet. (VM)

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