Consistency Measurement

Consistency is like any other measurement, you have to manage variables in a special way in order to get to the desired result. In consistency, there is a lot to consider. First, is the process mechanical, chemical or are we using recovered fibers?  What type of raw material are we using? If it is wood, what species? If it is recovered fibers, what quality? The fiber dimension, colors, chemical and fillers used are also variables to consider.

 

Consistency control is essential for managing the quality and efficiency of your process, if the consistency measurement drift, the production quality will decrease while the cost will increase because of the added chemical and water to compensate.

Since there are a lot of variables to add into the mix, the control and production can easily be disturbed by any minor change in the process. The wood type, for example, has a great impact on the process. If you change the wood type feeding in the process, it will have an impact on the consistency measurement because there will be a change in the variables. Therefore, a calibration will be required in order to get a precise measurement. The same applies if you are adding fillers in the process because there is a leaking valve, the process consistency will be affected. For those reasons, it is better to use a consistency transmitter technology that is less affected by all those variables. The microwave consistency measurement is not affected by as many variables. It measures the velocity of microwave propagation in the process medium. Valmet, the industry leader in consistency measurements for pulp and paper, has recently released their newest version of their microwave consistency transmitter the Valmet MCA 4G.

 

 

 

 

 

 

 

 

 

 

 

 

 

The 4th generation of Valmet consistency transmitter is a leap forward for consistency measurement. The Valmet MCA measures total consistency independent of fiber length, freeness, wood species or blend! Also, the measurement is not affected by the flow rate, the brightness or the colour in the process.

This means there is now less variable to deal with when measuring consistency. This means better production quality and efficiency. The MCA 4G requires no regular maintenance and is simple to install. The Valmet MCA has two different sensor type; Flow through sensor and Twin blades sensor. Both are reliable and precise but the flow through sensor type can only fit on smaller pipe diameter but don’t worry the twin blade sensor will give you the precision you need in larger pipe diameter.

 

 

 

 

 

 

 

 

With a measuring range of 0-16Cs% this transmitter can fit all your applications. The process temperature and pressure measurement allow the transmitter to automatically compensate for any change so you get the precision you need no matter what.

Where to use Valmet MCA 4G:

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