Differences between all the versions

Considering that we have different versions and models of laboratory filterpresses, you may ask yourself what is the differences, in a few words, between al the products in our portfolio.

First of all, as you certainly already know, every filterpress needs a feeding pump in order to feed the filterpress with the liquid to be filtered inside the filtering plates of the press itself.

This pump is not a common pump, but is an high pressure pump which needs to reach a pressure of about 12/15 bar, because the filtration with a filterpress can reach easily 12/15 bars of working pressure.

Most of the time, if you stop the filtering pressure at lower value (unless you have a membrane squeezing system as in some of our models), for example 6-7 bars, you will obtain a partially dewatere exhaust cake.

This means that you don’t obtain the lowest humidity possible in exhaust cake (also called residual panel).

Available options

In our portfolio, we have basically this choices:

  • We supply filterpress with electric pump / Take a look at “Electric – Series” LAB200-CEFS and LAB200-EFS
  • We supply filterpress with pneumatic pump / Take a look at “Pneumatic – Series” LAB200-CPFS and LAB200-PFS
  • We supply only filterpress without any pump / Take a look at “Stand-Alone” Version LAB200-SA.In this case the customer must provide the pump and the other equipment
  • We supply only filterpress without any pump in the a portable version / Take a look at “LAB200-TRAVEL

Why electric or pneumatic pump, what is the difference?

Basically, there’s no such difference;

Some customers prefer a unit that doesn’t require any power supply but require only compressed air – that’s why we have the pneumatic series.

Some other customers prefer unit with power supply and electric pump, and that’s why we offer also electric version.

In general electric version is more like industrial filterpresses, because in real application in 90% of the application an electric pump is installed and the management of the start/stop of the pump is pretty much the same between our electric series of LAB filterpress and industrial filterpress.

Both pneumatic or electric pump can reach the same pressure of 15 bar; of course the pneumatic version is cheaper.

The results in terms of dewatering doesn’t change between Electric or Pneumatic; is only a choice of the customer.

In the end, sometimes the customer want to provide itself the pump and the other equipments, so that’s why we can supply the stand-alone version LAB200-SA or LAB200-TRAVEL.

In this cases we can also supply the feeding pumps (pneumatic or electric) as stand-alone item and the customer will have to provide to connect the pump with the filterpress feeding.

What are the other auxiliary equipments?

In a lab-scale filterpress, like in the real applications, there are always other equipments like:

– slurry tank: the tank from which the pump suction the slurry and feed the filterpress

– filtrate tank: the tank in which the filtered liquid is collected

– water pump: the pump which is useful to wash and flush al the piping of the filterpress, in order to clean the equipment in the piping

– compressed air system: this is a system to deliver the compressed air inside the filterpress and in the piping in order to perform special tasks that can improve the efficiency of filtration.

Customer can decide to provide itself this auxiliary equipment, or in some case to use basic filterpress without special tasks.

In this cases we can also supply the feeding pumps (pneumatic or electric) as stand-alone item and the customer will have to provide to connect the pump with the filterpress feeding.

A brief explanation of our models.

Here is a short explanations of the differences between the models.

For the detailed features, please visit the dedicated web-page for each model


LAB200-CEFS and LAB200-EFS are the elctric series.

Electric means that the unit has an electrical panel which manage the feeding pump.

The difference between CEFS and EFS depends on the tanks: CEFS version has got from 2 to 3 tanks, one of them has got the electrical mixer for slurry tank, which is very important for slurries that settle very quickly.

Instead, the EFS has got no tanks at all (in charge to the customer).


 LAB200-CPFS and LAB200-PFS are the pneumatic versions.

Pneumatic means that the unit don’t require any power supply, because compressed air (6 bar) is enough for pilot station functioning, as the feeding pump is pneumatic.

Also in this case, the difference between CPFS and PFS depends on the tanks: CPFS version has got from 2 to 3 tanks (no mixer in this case), instead, the PFS has got no tanks at all.

Then, inside each one of this models (CEFS, EFS, CPFS and PFS),

you can find n°4 different versions, depending on the feature installed and process you can run:


is the simplest version, with only feeding pump


in this version you can perform cake blow and cake wash (washing pump is not supplied), and also core-blow and channel blow, because a pneumatic low pressure generation system is installed on board.

Cake Blow is useful to reach some more points of dryness in residual cake and in general allows a better detachment of the cake from the clothes (in a lot of applications, but not in everyone).


in this version you can find all the installed features that is available on STD version, but in addition you can also install membrane plates typology with high pressure squeezing system, that allows you to obtain a dryer cake in order to reduce the residual humidity as much as you can. With this kind of version you can install both standard recessed plates or also membrane plates.

In order to perform membrane squeezing an high pressure generation system is installed on board to allow customer to reach 15 bar of pressure (from 6 bar of net pressure required).

Membrane squeezing filtrations, allow to obtain some benefits showe in the next chapter.


in this version you can find all the installed features that is available on PLUS version, but in addition, a washing pump is installed. With the washing pump you can perform cake washing, if you need to wash the cake for your application, and also you can use this pump to flush the piping of the pilot filterpress, if you need to wash the station properly before performing a new filtration cycle with a different slurry or liquid and you want to reduce the contamination between the previous test and the new one.


In the end, the stand alone versions available are LAB200-SA version or LAB200-TRAVEL.

In both versions, only the filter press is supplied without any other accessories or auxiliaries (pumps, tanks, air generation systems, etc.).

All the other equipment like pump, tanks, ecc, must be provided by customer.

The main differences between the two versions are these:

  • LAB200-SA can install up to 15 filtering plates, instead LAB200-TRAVEL can instal a max number of 3 filtering plates
  • The LAB200-SA version has a closing system with hydraulic manual pump and hydraulic cylinder; instead in the LAB200-TRAVEL are provided two counterplates that compress the filter plates inside which precisely pressure filtration takes place: The counterplates  are bound together by 4 threaded connections that must be unfastened to allow extraction of the dewatered cake.
  • Due to his minimized footprint, LAB200-TRAVEL can be easily transported.

Membrane Squeezing System: when and why

As we have seen in the previous chapters, in all the PLUS and TOP versions of all the LAB200-EFS, LAB200-CEFS, LAB200-PFS and LAB200-CPFS models, is possible to perform the membrane squeezing filtration in addition to the standard filtration with recessed filtering plates.

Membrane squeezing filtrations, allow to obtain some benefits and it is used in this cases:

  • The dewatered slurry has characteristics that make pressure filtration through a pump only possible up to 6-7 bar. Beyond this limit, the pump is not able to increase the pressure. Therefore, if you want to obtain a cake with a high percentage of dry solids even with these slurry, it is necessary to use squeezing system.
  • The noble part of the filtration process is the filtrate and it is necessary to recover as much as possible. For example, this is the case with the filtration of slurry from the processing of sugar beet or sugar cane. In this case, squeezing is combined with washing the cake in such a way as to recover as much sugar as possible.
  • The slurry in question is thixotropic and, beyond a certain limit, it is no longer possible to filter it with simple pump pressure, but a mechanical squeezing action is needed to dewater the slurry to the maximum.
  • It is desired to dewater the residual cake as much as possible in a shorter cycle time, as the squeezing action is usually much faster than a normal filtration cycle.

In the same PLUS or TOP versions of all the LAB200-EFS, LAB200-CEFS, LAB200-PFS and LAB200-CPFS models, is possible to install:

  • A maximum of N°15 recessed plates (with or without spacers) – STANDARD FILTRATION or
  • A maximum of N° 8 recessed plates and N°7 membrane plates (with or without spacers) – MEMBRANE FILTRATION WITH MIXED PACK (is called mixed pack because the membrane is between a recessed plate and the other one).

Please keep in mind that to use filtration with membrane, the number of recessed plates used must be n°1 more than the number of membrane plates. Spacers are used only to increase filtering volume of the filtration chamber.



standard filtration with recessed plates


filtration with squeezing system with membrane plates


Check out our 6 versions of Lab Filtetrpress, from the basic one to the advanced complete dewatering station to satisfy your specific needs.

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