The following features are characteristic for the Q-Filter® systems. As a result of these features it is possible to filter down to very low particle sizes without high filter cloth usage and filtration cost. This makes Q-Filter® the perfect solution for applications like high pressure deburring, high pressure cleaning, aqueous cleaning baths, machine coolants and emulsions and many more.
The most important features are discussed in more detail here.
In filtration, efficiency indicates what minimal particle size a filter can remove. This primarily depends on the sealing; what ever means are used to make sure the medium can only pass through the filter cloth and not bypass it through a seam or poor sealing. The better the sealing, the finer the filter cloth you can use and the smaller the particles that can be used.
In a belt filter, sealing is quite a challenge since all you have is a flat piece of filter cloth and whatever sealing you use, it may never obstruct the transport of the filter cloth through the unit. In a Q-Filter®, the sealing mechanism is an integral part of the transport mechanism, allowing very tight sealing.
With Q-Filter® it is possible to use filter cloth with an efficiency down to a particle size of 5µ! The picture shows the excellent sealing, noticable from the white tracks where the sealing prevented dirt from passing to the sides of the filter cloth.
As with any system of a similar complexity, there are a lot of parameters that control how Q-Filter® behaves and responds to changes in the process conditions. Imagine having to adjust these parameters to find the best settings for a specific application. And what if the process parameters change or you want to use a different filter cloth.
Not an issue at all with Q-Filter® because it is completely self-adjusting. It continually monitors the process and determines what vacuum to apply, at which point the filter cloth shall be indexed and how much the filter cloth is indexed. Dynamically, which means, that if you have fluctuating process parameters, Q-Filter® will continuously readjust, following the fluctuations, for optimal performance.
In some applications a reduction in filter cloth usage of more than 33% was observed once the dynamic behaviour was enabled.
And what is very nice too: no start-up adjustment procedure. Connect it, turn it on and start using it!
Q-Filter® is designed for fully automatic, continous operation. No need to take the filter off-line to replace the cloth and cloth indexing takes place without interupting the incoming flow.
To place a new roll of cloth, any excess lenght of the old cloth is cut off, the new cloth is placed underneath the remainder of the old cloth and while pushing the two layers of cloth together and forward, the unit is indexed using the foot-switch. This will cause the new cloth to be pulled in, into the unit, until it comes out at the other end and the last piece of the old cloth falls out. All the time filtration continuous as normal without intrupting the incoming flow.
In addition to the above features Q-Filter® has a very low energy consumption. Because of the perfect sealing of the cloth on the sides, only very little air can enter the vacuum chamber and as a result, only a very small exhauster is required to achieve the 200 mbar underpressure. For the QF-150 this is less than 1 kW, for the QF-300 it is 2,2 kW. Further more the exhauster is only on when vacuum is really required.
The maximum vacuum of 200 mbar means that the filter cloth is used much more effectively. The filter cloth is 'clogged' when it no longer can pass the required flow. In a conventional filter, a surge in the incoming flow will alsmost certainly cause the filter cloth to be indexed. In the Q-Filter® it will cause the vacuum to be increased. When the surge is gone, the vacuum is decreased again.
Finally the floor space required by a Q-Filter® is very limited. That means Q-Filter® can easily fit into the space taken by an existing filter and less expensive floor space needs to be reserved in new production plants.