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Activated carbon filter cartridge type “PA-G”

Putsch® offers a comprehensive range of different activated carbon filter cartridges. These are used where mechanical filtration alone is no longer sufficient for the dissolved substances as these are only of molecular size.

Activated carbons are differentiated depending on their raw material source (e.g. hard coal or plant residue such as coconut) and their delivery format (pellets, blocks, granulate, powder). The individual requirements of the customer determine in which type and form activated carbon can be used most effectively. These filter cartridges use activated carbon from coal as a natural product. Coal adsorbs many dissolved substances from liquids which can otherwise not be filtrated mechanically. The adsorption action of activated carbon binds dissolved substances such as oil, grease, pesticides, colorants and other organic compounds from liquids to enable their removal.

Excess chlorine or, for example, disinfectant ozone react with the activated charcoal and are neutralized. Odorous substances are fully bound by the activated carbon and can no longer escape. Once bitterns have been adsorbed by activated carbon, they can no longer contaminate food. As a result, activated charcoal has become a staple in the food industry. In electroplating, activated carbon is used very effectively to remove interfering organic compounds from various baths.

The loose filling means that the initial differential pressures are low, providing the long service life.


General information/design

The activated carbon cartridge filters type “PA-G” use activated carbon from specially activated coal. Coal adsorbs all dissolved substances from liquids which can otherwise not be filtrated mechanically. The adsorption property is based on electro-kinetic processes and improves as the available surface increases. 

The high efficiency of the activated carbon surface is due to it pore structure. As carbon is amorphous, however, and has no own suitable structure, the pores are burned deep into the coal using hot steam and precisely dosed oxygen in a labyrinth pattern. This “steam activation” creates a vast inner surface in the coal which provides an extraordinary adsportion capacity.

The large molecules adsorb mostly on the outer surfaces, while the smaller molecules can primarily be found inside the charcoal. The inner labyrinth structure of the coal as well as the different pore channels support this size distribution of the molecules from outside to inside, allowing a particularly long useful life.

The hardness of coal has the advantage that it can be pressed into dimensionally stable pellets without adding adhesives. The activated carbon consists of 100 % hard coal.

The special hardness of the pellets prevents abrasion of fine dust, providing a particularly short running-in time, which makes these activated carbon filter cartridges type “PA-G” particularly effective and economically viable.

The activated carbon filter cartridges type “PA-G” stand out on account of the particularly efficient coal and the dimensionally stable pellets as well as their structured design.

These cartridge filters are filled with pellets through which the respective medium flows with a low flow resistance while the unwanted molecules are adsorbed. The open structure of a loose filling decreases the stagnation pressure, ensuring a longer useful life than, for example, a dense block of activated charcoal powder.

A polyethylene filter layer is installed before and after the filling, holding the filling together while also retaining dirt and therefore supporting effective filtration of the liquid.

The liquid flows through the filter cartridges radially from outside to inside. The large intake surface ensures a particularly long useful life. All parts used are mode polyethylene or polypropylene, making the filter elements inert to acid and lye, which means they are also suitable for filtration of electroplating chemicals. Even the end caps are permanently bonded with melted polypropylene and free from solvents or chemical adhesives.


The carbon can be used for food without restrictions as 
it is already only harmless coal as a raw material.

Steam activation is a gentle process and does not change the chemical composition of coal, but rather creates only an enormous adsorption strength through the gained porosity.

No substances that could interfere with adhesion, e.g. silicones, are permitted in surface coating systems, among others. All components are free from silicone.

The filter cartridges are manufactured at the Hagen plant in compliance with all strict national and international regulations.


Most filter cartridges are used in customer applications in the version with both ends open (DOE). 
The caps are permanently attached, so the activated carbon cannot be replaced. These adapters are suitable for cartridge housings with cutting edges and typical for polypropylene cartridge housings. Additional adapters are available with O-rings which are permanently attached at the Hagen plant.

Alternative activated carbon filter cartridges

If you are looking for other activated carbon filter cartridges, Putsch® offers the whole range from other suppliers. As a large distributor in Central Europe, any type can be procured and offered with short delivery times at a competitive price!
Please contact us!

Technical data

Technical dataActivated carbon filter cartridge type “PA-G”
Medium materialCylindrical hard coal (pellets)
Support body/core materialPolypropylene
Outer tube materialPolyethylene, sintered
Seal materialsEPDM (flat seals for DOE)
Length of filter cartridges (standard)250 mm, 500 mm, 750 mm, 1000 mm as well as 9 3/4″, 10″, 20″, 30″, 40″
Inner diameterapprox. 27 mm
Outer diameter64.5 mm for DOE
Max. temperature70 °C for water under static conditions
Recommended flow rateMax. 300 l/h of water per 10″ activated carbon filter cartridge
Application examplesWater, odor and taste neutralizing, dechlorination, electroplating baths, hot liquids, solvents, viscous liquids, oxidizing agents (e.g. potassium permanganate, hydrogen peroxide, nitric acid), hot steam

NOTE: As a rule, all types of activated carbon filter cartridges must be flushed initially until the liquid is visibly clean. In addition, the adsorption capacity and useful life of activated carbon filter cartridges is significantly improved through upstream filter cartridges with mechanical filtration action.

9 3/4″ filter cartridge: 90 % chlorine reduction at 2 ppm chlorine in the water
10″: 35 m³ water at 3 l/min
20″: 70 m³ water at 6 l/min
30″: 105 m³ water at 9 l/min
40″: 140 m³ water at 12 l/min

Filter cartridge product range

String-wound filter cartridges

Putsch® offers a very large selection of string-wound filter cartridges in many sizes, designs, materials and winding patterns.

Depth filter cartridges type “HP”

The depth filter cartridges type “HP” from Putsch® are special depth filters on polypropylene basis which are known for their particularly long useful life.

Depth filter cartridges type “CX”

The depth filter cartridge type “CX” is a 3D absolute filter for customers with very high cleanliness requirements.

Pleated depth filter cartridges type “K11”

The Putsch® depth filter cartridges type “K11” with their micro-polypropylene filter matrix are known to be particularly effective and are especially suitable for filtering out ultrafine particles.

Membrane filter cartridges type “K01”

Putsch® membrane filter cartridges “K01” use a polyethersulfone membrane, filter finest particles down to bacteria and have special adsorption properties.

Mesh filter cartridges type “PGP”

The mesh filter cartridge type “PGP” is a versatile, reusable filter cartridge made from polypropylene mesh. It is easy to clean and can quickly be converted.

Metal mesh filter cartridges type “MGG” + MGP”

Putsch® metal mesh filter cartridges type “MGG” + MGP” are special stainless steel cartridge filters for operation at high temperatures or with specific chemicals.

Activated carbon filter cartridges type “PA-G”

Putsch® activated carbon filter cartridges type “PA-G” are equipped with steam-activated coal pellets and specially designed for strongly contaminated liquids. The bulk form means that the activated carbon surface cannot become blocked by coarse dirt, making the useful life extremely long.

Activated carbon filter cartridges type “EPS”

Putsch® activated carbon filter cartridges type “EPS” are manufactured with activated coconut coal. The activated carbon block has a homogeneous layer with constant adsorption properties. In addition to applications in liquids, these filter cartridges are also suitable for air and gas purification.

Activated carbon filter cartridges type “GAC”

Putsch® activated carbon filter cartridges type “GAC” are made with activated coconut coal granulate and designed for low dynamic pressure and therefore a long useful life. The special design allows the liquid to pass through the entire filling, so the long contact times increase the adsorption effect.

Filter cartridges type “Pro”

Putsch® filter cartridges type “PRO” are cartridge filters on the basis of phenolic resin-bound acrylic fibers, designed for the special requirements of paint and varnish filtration.

Customer Service Center

Use our extensive range of services for solid/liquid separation. Your contact can help you with any questions and problems.

Please send any inquiry and order to

Customer Service Center

Christina Hölper
Phone: +49 (0) 23 31 / 3 99 1 53
Florian Ollesch

Customer Service Center

Phone: +49 (0) 23 31 / 3 99 – 1 50

Emergency number

If you need to contact us in emergencies outside office hours, the responsible Putsch® employee will be informed immediately and the required measures for solving your problem will be initiated.

Phone: +49 (0) 23 31 / 3 99 – 0

Related products:

String-wound filter cartridges

Putsch® offers a very large selection of string-wound filter cartridges in many sizes, designs, materials and winding patterns.

Cartridge housings type “4”

Cartridge housings type “4” are robust stainless steel filter housings which are modular and accordingly versatile.

Cartridge housings type “6”

Cartridge housings type “6” have been used widely in all industries for over 40 years and are particularly popular due to their solid, robust quality.

Polypropylene Cartridge housings

Housings type “SM”, “SL” and “PN” are polypropylene cartridge housings for use as water filters, each with individual filter cartridges. Their low weight makes them ideal for mobile use.

Cartridge housings type “D-PP”

The customized cartridge housings type “D-PP” are made of polypropylene and are used wherever comparable metal housings are unsuitable, e.g. in an environment containing salt.