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Technology and product range

Surface filter cartridges are used for maximum dirt-holding capacities. In this process particles are stopped on the filter surface.
Available in various sizes and micron ratings, you will benefit from the durable material of the filters as well as an extremely low release of fibers. Therefore they are ideally suited to a variety of applications.


Folded cellulose and polypropylene cartridge

- special formulation of resin-impregnated cellulose and polyester fiber
- provides higher wet strength compared to regular cellulose cartridges
- minimal release of fibers

ECP series filtes are produced according to a special formulation of resin-impregnated cellulose and polyester fiber.  This unique blend of materials provides a higher wet strength than regular cellulose cartridges. It also provides high flow rates and dirt-holding capacity, while maintaining extremely low pressure drop. The media is pleated around a polypropylene core for added strength. The ends are immersed in a thermo-setting vinyl plastisol. Thereby sealing and end cap are one and the same.
A colour-coding system of the cartridge end caps, facilitates the identification of micron ratings of the ECP series filter cartridges.

Colour code:
- Beige (1-micron)
- White (5-micron)
- Blue (20-micron)
- Yellow (50-micron)

Contrary to similar cartridges, the new ECP filter cartridges are convincing with their great surface. The standard 10 inch filter cartridges have a filter area of more than 0.56 m², while most of the other cartridges only have 0,37 m².  The ECP cartridges contain the following quantity of filtering material:

- standard 20" filter cartridge - 1,11 m²
- 10" BB filter cartridge - 1,67 m²
- 20" BB filter cartridge - 3,34 m²


Should you have any questions about the application, use skype, send us an inquiry or just call us. You will promptly receive a detailed quotation.

All items you will also find in our webshop for immediate delivery.


Pleated cartridges
  S1- series ECP-series R-series SHP-series SHG-series Polyval-series Polyval HE-series
Benefits Economically priced,
recommended for chlori
nated water supplies
Provides higher wet
strength than regular
cellulose cartridges
Reusable, bacteria and
chemical resistant
Hohe Nassfestikeit, verschiedene Endkappen erhältlich Recommended for high
temperature and agressive
chemical applications
Built with a continuous length
pleat structure and support
ing outer cage. wide range of
filtration efficiencies
Excellent filtration efficiency
(up to 98%)for the most de
manding applications
Media Resin-impregnated
Cellulose polyester Non-woven polyeste Polyester fiber glas Polypropylene Polypropylene
Central core Yes Yes Yes Yes Yes Yes Yes
Available length 9 3/4 "  - 20" 9 3/4 "  - 20" 4 7/8" - 20" 20" - 40" 9 3/4" - 40" 9 3/4" - 20" 10" - 40"
Available μ rating nominal 20 1/5/20/50 30/50 5/25 0,5/3 0,2/0,45/1/20/40 0,2/0,45/1/20
End cap styl DOE DOE DOE DOE/3F/7S DOE/3F/7S DOE/3F/7S DOE/3F/7S
Available in Big Blue version Yes Yes Yes No No No No
Temperature rating 4.4 - 62,8°C 4.4 - 51.7°C 4.4 - 51.7°C 4.4 - 51.7°C 4.4 - 79.4°C 4.4 - 62.8°C 4.4 - 62.8°C
Filtration efficiency* ** ** ** ** ** ** ***
Initial pressure drop* ** ** ** ** * ** *
* Note: * = good, * *= very good; *** = excellent

Optimize your shopping experience with our detailed delivery information

Plastic pipe systems

Overview of plastic pipe systems
Technical information on ABS pipe systems
Technical information on PVC  U pipe systems
Technical information on PVC  U transparent pipe systems
Technical information on PVC  C pipe systems
Technical information on PP pipe systems
Technical information on PP-R pipe systems
Technical information on PE pipe systems
Technical information on PVDF pipe systems

Chemiedur - pipe

Technical information on UP-GF (FRP) pipe systems
UP-GF (FRP) pipes
UP-GF (FRP) molded parts and connection
UP-GF-PP (FRP) molded parts and connection
UP-GF (FRP) adhesive collars
UP-GF (FRP) loose flanges
Pot Strainer DN 200 - DN 500 Inliner PP/FRP Coated
Pot Strainer DN 200 - DN 500 Inliner FRP/CBL Coated
Angle Seat Strainer DN 200 - DN 400 Inliner FRP/CBL Coated
Manhole mad of FRP and PP/FRP

Plastic pipes

Calculator for cutting pipes
Guidelines for sawing plastic pipe
Leftovers in plastic pipe
Standardization of plastic pipes and molded parts
PVC U pipes deviations
Pressure loss in pipe systems out of PVC U, PVC C and ABS pipe systems
Distinction between Rp, R and G threads
Screw lengths for flange connections

Plastic fittings

PVC U transparent ball valves
Diaphragm valves
Block valves
Butterfly valves
Plastic needle valves


Plastic Valves according to ATEX

New EU guideline 2014/34/EU
Plastic Valves in EX zones
Y-Strainers PP-EL DN 15 - DN 50
Check valves PP-EL DN 15 - DN 50
Angle seat valves PP-EL DN 15 - DN 50

Bonding of plastic pipes

Bonding manual
Video showing the bonding of pipes

Plastic welding

Guidelines for extrusion welding

Grids / support grids

GFK grids
Grids out of PP -el electrically conductive
Profile support grids out of PP -el electrically conductive

Molded ventilation parts

Ventilation technology

Chemical hose

PVC transparent hose with fabric inlay

Industrial tanks and chemical containers

Dosing tanks and outer containers 35 – 1000 Liter
Salt dissolving tanks 60 -5000 Liter
Storage tanks and vats
Storage tanks for water
Safety and collecting troughs
Industrial tank delivery program
Dosing tanks with agitator
Dosing tank agitators
Dosing tanks with attachments
Dosing tanks made of sheet material
Customized chemical containers
Dosing tanks with level indicators



IBC screw caps DN 150/DN 200
IBC adapters out of PE
IBC adapters out of PP

Attachment parts for tank construction

Vapor separators
CO2 - absorbes
Revision nozzles
Block flange

Filter housings and filter cartridges

PENTEK 3G Slime Line filter housings
PENTEK 3G Standard filter housings
PENTEK Big Blue filter housings
PENTEK PP high temperature filter housings
PENTEK PP all nature filter housings
PENTEK filter bags for Big Blue filter housings
PENTEK surface filter cartridges
PENTEK filter cartridges for depth filtration
PENTEK filter cartridges with activated carbon
CINTROPUR filter systems
CINTROPUR water filters

Flange configurator

Blind flanges, loose flanges,  rectangular flanges

Chemical resistance

Table of chemical resistance for plastic pipe systems

Machined plastic parts

Screw-in parts
Threaded fittings
Screw fittings

Milled plastic parts

Loose flanges and blind flanges made of sheet material

Static mixers

Static mixers made of plastic


Single-type and double-type strainers
Pot strainer DN 300
Angle seat strainer DN 500

Flow meters

Variable area flow meters
Configuration tool for flow meters

Filter presses

Laboratory filter presses

Injection molded parts

Scraper made of PE for filter press

Kwerk Practice Blog

The Kwerk team blogs from the field here

Partnership at the highest level.