Membrane Chamber Plates

1. Short filtration cycles
2. Short washing cycles
3. Low residual moisture
4. Exchangeable membrane
5. No direct load on membrane due
   to press closing force
6. High elasticity of membrane
7. No problems during membrane movement
   even in the empty chamber
8. Time-independant membrane movement
9. Sealing of filter plate system
10. Large cross-sectional area of filtrate outlet
11. Many fields of application
12. 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 membrane chamber plates this filtration time can be decreased considerably. The required residual moisture is obtained by the mechanical squeezing with the elastic membrane.

Residual 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 values. 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. JVK 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 is the complete gasketed version of the JVK membrane chamber plate.

Membrane Chamber Plate Type CGR 630 x 630 mm

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.

The use of the operating manual provides a safe working environment with JVK membrane chamber plates.

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