- Short filtration cycles
- Short washing cycles
- Low residual moisture
- Exchangeable membrane
- No direct load on membrane
to press closing force
- High elasticity of membrane
- No problems during membrane movement
even in the empty chamber
- Time-independant membrane
- Sealing of filter plate system
- Large cross-sectional area of filtrate
- Many fields of application
- Safety factor of the membrane system
1. Short Filtration Cycle
The rate of growth of the filter cake decreases rapidly with progressive
filtration time. Plates and frames as well as recessed plates do
not need very long filtration time in order to achieve a low residual
moisture in the filter cake. By using JVK
plates this filtration time can be decreased considerably. The required
residual moisture is obtained by the mechanical squeezing with the elastic
moisture after the filtration with membrane chamber
A = End of filtration with membrane chamber plate
B = End of filtration with chamber plates
C = Residual cake moisture after the squeezing
with membrane chamber plate
A`und C`are possible product dependent operating
The optimal operating condition A can be determined after a few filtration
cycles. Cake compressibility, filtercloth, pump capacity etc. will influence
the process optimisation.
2. Short Washing Cycles
When using normal filter elements the non-homogeneous cake set-up leads
to non-uniform washings caused for example by cracks and gaps in the cake.
membrane chamber plates avoid such problems by low
membrane squeezing during washing. A uniform capillary structure within
the filter cake is created and pruduces an optimal washing with a highly
reduced consumption of washing liquid.
3. Low Residual Moisture
The necessary high filtration pressure during pressure filtration is
replaced by squeezing the filter cake by the help of high elastic membranes.
The squeezing is done at a right angle and not along to the filter area.
In shortest time the remaining moisture within the filter cake is reduced
considerably and the filtrate output increases.
The results are the following advantages:
- Saving energy costs
- Solid content can be increased up to almost
100% due to a
special vacuum process
- Shorter time for cake blowing
- Less cake adhesion at filter cloth
- Much shorter times for discharge
- Automation of filtration process
- Lower costs for pumps
- Reduced transport costs due to compact,
dry filter cakes
- Saving deposit costs
4. Exchangeable Membranes
The membranes can easily be exchanged inside or outside the filter press.
5. No direct Load on Membrane due to Press Closing Force
Rim of membrane ends before the sealing area
on the core plate. Therefore the filter press closing force is not exerted
on the membrane but on the seal area of the core plate.
6. High Elasticity of Membrane
The elastic membrane adjusts itself without permanent deformation to the
uneven cake surface and different cake densities caused by the process.
This characteristic grants a most uniform and intensive cake squeezing.
7. No Problems during Membrane Movement even
in the empty Chamber
The membrane is mounted in unloaded position. Independant of chamber depth
the membrane moves during squeezing without any problems into empty chambers.
8. Time-Independant Membrane Movement
The stepwise building up and down of pressure during feeding, washing
and squeezing can be omitted under certain conditions. Process steps can
be optimized when using JVK
membrane chamber plates.
9. Sealing of Filter Plate System
Treatment of sealing areas of the core plate is done in accordance to
DIN 7129. The membrane, fixed within the edge area, results an excellent
sealing to the chamber.
The CGR type
the complete gasketed version of the JVK
Membrane Chamber Plate Type CGR
10. Large cross-sectional Area of Filtrate Outlet
Diameter and numbers of filtrate outlet ports from filter area to corner
port are adapted according to the requirements. High filtrate volumes
can easily be drained off by diameters up to 10 mm. Therefore there is
no blocking due to solids and/or crystallization.
11. Many Fields of Application
The materials used by JVK provide installations in almost every field
of application and can be adapted to each working condition. The use under
the following conditions is possible by membranes made from special elastomers
in connection with the most suitable materials of the core plate:
- Temperatures from -20 to + 140° C
- Filtration pressure up to 1,5 Mpa
- Squeezing pressure up to at least 2,5 Mpa
- Extreme variations in temperature (temperature shock)
- Special chemical demands
12. Safety Factor of the Membrane System
There is no rigid connection by screwing or welding between the membrane
and the core plate in the sealing area. The pressure of the squeezing
medium behind the membrane can only be maintained under closed filter
press. If there is applied a membrane inside pressure under opened or
just getting opened filter press the membrane is immediately released
from groove. There is no dangerous pressure release and no damage of
the membrane. The effort for precautions can be reduced considerably.
use of the operating manual provides a safe
working environment with JVK membrane chamber plates.