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On this page we inform you about news and interesting information in the field of filtration and our company. Subscribe here to receive our newsletter and you will be updated automatically.

Merry Christmas and a happy new year

At the end of the pre-Christmas season, many are currently in the last working week of the year. 

We wholeheartedly wish you a merry Christmas, a contented reflection on the past, a little faith in the future and hope for the future.

We wish you good luck and good health for the new year and look forward to a trusting cooperation in 2019.


Bag Filter Housing

Depending on the flow rate, operating pressure, temperature and fineness requirement we offer the right filter bag housing. With a bag filter insert as the filter medium, these housings are used from metal cutting through filtration of water to the food industry.


Cooling lubricant filtration

Filter Fleece in Cooling Lubricant Filtration

In metalworking, the treatment of cooling lubricants is essential in order to ensure qualitative requirements for the machined part as well as the protection of the system components (pumps, valves, nozzles, etc.). To clean the cooling lubricant, belt filter systems are used which retain machining residues such as metal chips or abrasive particles with the aid of nonwovens. The properties of filter fleece are i.a. determined by the choice of material (PES, PP, viscose, etc.), the type of solidification (chemical, thermal, mechanical) or the grammage. Our filter fleeces are suitable for all machining processes such as drilling, turning, milling, honing, lapping or grinding.


Magnetic Rods in Filtration

Magnets are used for the filtration of iron-containing particles e.g. in metalworking, surface finishing and the food industry. For that purpose, a magnetic rod is placed before the actual filter, on which the metal particles from the liquid deposit. As a result, the actual filter lasts longer, which means that it has to be changed less frequently and costs can be saved. The magnetic rod itself can be cleaned and reused. With a magnetic flux density of around one tesla, our magnetic rods are among the strongest permanent magnets, making them almost ten times stronger than standard horseshoe magnets.


Meltblown and String Wound Filter Cartridges

Filter cartridges are commonly used in meltblown or wound versions.

The first string wound filter cartridge came on the market in the beginning of the 20th century. The basic structure is still unchanged: Depending on requirements, a polypropylene, cotton or fiberglass yarn is wound onto a core (PP, PVDF, stainless steel) to be selected. The yarn is wound more loosely toward the outside in order to achieve a stepwise filtration of coarse to fine particles.

An alternative to this are the somewhat "younger" meltblown filter cartridges manufactured by the meltblown process. Here, the polymer is melted in an extruder and pressed through several nozzles. The exiting fibers are transferred to the rotating cartridge via a stream of air. Again the density of the fiber layers can be varied, e.g. through the rotational speed. At constant fiber density, it is also possible to filter absolutely with meltblown filter cartridges.

Would you like to know more about our filter cartridges? Contact us for a personal conversation!


Fibers for Felt Production

Felts are among the oldest textiles and are still made of animal hair such as sheep wool. Animal fibers have the property to hook themselves together due to their scale structure and thereby to matt. The synthetic polymer fibers used in our filters don't have this property. Here, the solidification is usually done by mechanical methods such as needle punching or water jetting, in which the fibers are intertwined with each other by stinging needles or by a focused jet of water. These processes can be used for all types of fibers and are today's standard for technical nonwovens in the filtration sector.


Merry Christmas and a Happy New Year

We wholeheartedly wish you a merry Christmas, contentment for the past, faith for tomorrow and hope for the future.

We wish you happiness and good health in the following year and we are looking forward to a trustworthy cooperation in 2018.


Activated Carbon Filtration

The filtration with activated carbon detains substances that remain in the filtering medium after the mechanical separation of solid particles. In a finished project, mechanical impurities were filtered through a prefilter in the form of a multiple filter cartridge housing with meltblown filter cartridges. After that the same housing was used with activated carbon filter cartridges for the adsorption of different dissolved substances:

Activated carbon has a large inner surface which enables it to remove dissolved substances. Furthermore, carbon is a reducing agent that can remove various oxidizing agents from different liquids.

In one of our next posts we will present you a more detailled look at the possibilities of activated carbon filtration. If you are interested in this topic, contact us and we will gladly advise you. Until then, we wish you a happy Saint Nicholas Day and a blessed Advent.


Filter Discs

Filter discs are often used for the purification of process baths in electroplating. They are available as fabric or felt versions with wide-ranging grammages and dimensions. Furthermore they are offered as filter papers with different surface weights - typical are e.g. 90 g/m² or for a finer filtration 400 g/m². There are also activated carbon designs which are used for the removal of toxic substances.

We are happy to advise you in a personal conversation!


Air Filter Housings

Our air filters come with the right housings. Whether compact filters, HEPA filters or pocket filters - the appropriate housings are available in many different variants:

  • Galvanized steel or stainless steel 1.4301
  • Flange connection SB 20 or SB 30
  • Adaptors manufactured according to your requirements

Besides the housings for 1 - 20 filters in standard sizes we can also provide special dimensions. 

Are you currently having a demand for air filter housings or would you like to get further information? We look forward to hearing from you!


Filtertuchapplikationen tropfdichte Ausführung Lochkranzverstärkung Randabdichtung Filzdichtrand Noppenverstärkung Messingösen Edelstahlösen

Filter Cloth Variants

Filter cloths for filter presses are for sale in numerous variants. The strongest effect on the filtration has the filter fabric. Apart from this, there are many more options.

In order to avoid the filter fabric from premature tearing in the section of the cloth holding pins, it can be reinforced with incorporated stainless steel or brass eyelets.

A drip-tight design can prevent fluids from leaking. Therefore, a sealing element that seals between filter plate elements, is sewn into the filter fabric.

Further applications like edge coatings, felt seals, bolt circle reinforcements or cam reinforcements are feasible as well. Please contact us for your personal filter cloth quote!


Filterronde aus Edelstahl, Stahl, Aluminium mit Filtergewebe, Filtervlies

Filter Discs

A cylinder with shorter length compared to its diameter is called a blank or disc. Accordingly a filter blank or filter disc is such an object with a filter element. They are available in any desired dimensions and shapes. The steel and stainless steel versions are very common. Depending on the application, one or more wire mesh or nonwoven layers with filtration fineness grades from 3 µm to 10 mm are applicable:

  • Filtration of extruded polymers
  • Elements for the solid-liquid filtration
  • Air filtration

Do you have an application for these filters? Contact us for a non-binding consultation.


Bag Filters

Despite the straightforward filtration principle of the standard design (filtration from inside to outside through one layer) und the relatively simple structure, the microfiltration with filter bags can become quite complex due to countless variants:

  • 20 filtration fineness grades
  • 6 collar designs
  • 4 felt types
  • 4 standard sizes
  • 3 fabric types

Beyond that Sanin Filtertechnik offers multilayer filter bags, special lengths and different packaging options. These are suitable for many areas of application - whether industrial parts cleaning for paints and lacquers or with FDA-/EU 10/2011 certification for food applications.

Please contact us directly for an individual consultation!


Pleated Stainless Steel Filter Elements

In a current project we constructed pleated stainless steel filter elements for one of our customers. They will be used in oil for the protection of a downstream pump. In contrast to the conventional cylindrical design, this construction shows a larger filter surface by 2200 % which results in an improved lifetime.

In addition to special constructions we offer various standardized filters made from stainless steel. Different designs are feasible:

  • Stainless steel, carbon steel, galvanized steel, copper, brass phosphor bronze, special alloys
  • from 3 µm to 10 mm

  • customized dimensions, sealings and connections (e.g. DOE, with thread, ...)

Are you in need of a special solution or standardized metal filter elements? Please get in contact with us.


Modular Filter Bag Housings

For applications in which size 2 filter bag housings cannot ensure sufficient flow through there are several "bigger" solutions. Apart from multi bag filter housings available for 3, 4, 6, 8, 12, 17 and 23 filter bags, it is possible to choose a modular version:

  • Available with 2 to 8 filter bag housings
  • Flexibly extendable at all times
  • Space-saving
  • Filter bag replacement possible during ongoing operation due to ball valves

For further information about modular systems or your customized filter housing please contact us! 


NEW on our website: Air Filters

Besides our standard products in the field of filtration technology and liquid filters, we extended our website with a wide range of industrial air filters:

  • Pocket filters
  • Filter mats/rolls
  • Compact filters
  • Filter cells
  • HEPA filters

Our air filters are available with filtration finenesses from G2 to U17. Please check our air filters here and don't hesitate to contact us.


influencing factors for liquid filtration operating costs temperature pressure medium flow continuous batch pressure drop particle

Influencing factors for liquid filtration

There are several parameters in liquid filtration which influences both choice and construction of your filtration system.

Besides operating conditions (temperature, pressure and flow) you should pay attention to the operating media. Thereby chemical resistancy and viscosity are important elements.

Type, amount and size of particles and the filtration fineness as a result for the desired quality of filtration are responsible for the development of the pressure drop. The pressure drop itself is a defining factor for your filtration system.

Additionally operating costs are one of the most important points for the end users itself, while the choice between continuous and batch filtration is commonly defined by the process.

We appreciate to work together with you in view of the above. If you are generally interested in this topic, don´t hesitate to read future articles on this site. We will deepen your knowledge regarding the single influencing factors in the future.



2017 has arrived a couple of weeks ago and we would like to start it off with a short overview of our product range for the food and beverage filtration:

Our filter nonwovens with FDA certification are limited to polyester spunbonds with excellent mechanical properties and high temperature stability. They are therefore perfectly suitable for example for the filtration of hot oils.

There are a lot more products available in the field of filter bag, filter cartridge and filter cloth filtration. This variety also reflects the application possibilities. Monofil filter cloths for wine, juice or beer filtration; filter cartridges and filter bags for the sugar production or also beverage filtration.

Our filters are employed successfully in many different applications. Contact us with your project or filter needs and we will gladly advise you.



Pre-Christmas period is coming to an end and some of you might also be in their last working week of the year.

We wholeheartedly wish you a thoughtful Christmas season, contentment for the past, faith for tomorrow, and hope for the future.

We are looking forward to a trustworthy cooperation in 2017.

You can contact us with your inquiries, projects and orders over the turn of the year.



Pleated high-performance filter elements have been complementing our product range in the field of filter bags for a couple of weeks now. They are compatible with most of the common filter housings. The approved and simple handling of filter bag systems is combined with the performance features of filter elements – highest uniformity of the separation efficiency, large filter surface for a maximum dirt absorption capacity and the option of customized products for specific applications.

The available sizes range from bag size 1 up to ca. 1500 mm long elements. We gladly compare these filter elements with the alternative standard filter bags, XL and XXL filter bags from an economical and technical point of view. Whether a new construction or only a modification of your existing filter system – please contact us and we will gladly assist you.


Filter cloths for fruit juice filtration


Filtration is an important part in fruit juice production. The depicted filter cloths were developed for a chamber filter press in collaboration with a juice producer from southern Germany. The use in filter presses often comprises a fluid loss, because the liquid is squeezed out of the filter system along the filter cloth thread. These losses are avoided with the blue edge coating. Like this a clouded filtrate is prevented and a clear juice can be extracted in an economic way.

Beside filter cloths there are various other products that are suited for applications in the food industry. Whether it is cartridge filters or filter bags, contact us about your current needs and we will gladly assist you.


Stainless steel filter cartridge housing with differential pressure display for purification of organic solvents


The technical realization of the purification of a lacquering fluid for one of our customers will in the future be ensured by a cartridge filter housing. In order to reach a consistently high quality level and avoid rejects, the filter medium, which is applied on PCBs, can be filtered through a 5 µm stainless steel filter cartridge. The process is secured by a pressure gauge which indicates the right time for a filter change.

Do you have an application in which you want to filter a liquid in a new or different way? Our product portfolio ranges from string wound filter cartridges with nominal filtration fineness through pleated absolute filter cartridges to stainless steel filter cartridges for very demanding environments. In combination with the respective single or multiple cartridge housings made of stainless steel or plastic, your problem will be solved.


Belt Filter


Belt filters for the filtration of liquids are optimally complemented by our filter nonwovens. No matter if cooling lubricants or emulsions respectively, rolling oils, waste water, chemicals or other liquids - we can offer you the right nonwoven for your filter unit. The commonly used belt filter systems like gravity belt filters or vacuum belt filters differ with regard to their requirements for the used nonwovens. Technical parameters like the nonwoven thickness, air permeability, filtration fineness or the permissible tensile forces are crucial for the compatibility. In order to facilitate the selection for our customers, we added a subpage to our website which contains schematic depictions of common belt filters with filter fleece recommendations.

We will gladly assist you with individual consultation!


Bag filter housings for cooling lubricant filtration


Cooling lubricant filtration for the protection of pumps and machine components? This is where our filter bag housings show their full performance capabilty in a current project. Therefore, the cooling lubricant has to be purified from different deposits and incorporated impurities. Our filter housings Topline together with needle felt filter bags with high dirt holding capacity are suitable to perform this task up to a volume flow of 40 m³/h per filter bag housing in size 2.

Are you in need for the filtration of a liquid? In our assortment of more than 1000 filter bag variants you will find the right choice as well as in the selection from different filter housings. Whether single housings in diverse designs or multi filter bag housings - we assist you and find the right selection together with you.


Bubble Point: Pore size determination


The pore size plays an important role for filter products and needs to be chosen accurately. As small as necessary to retain all dirt particles and as large as possible in order to keep the liquid flow rate high enough. But how can the pore size or filtration fineness be determined?

Frequently used in quality control is the so-called bubble point test where an air stream is directed towards a filter medium which is dipped into a liquid. The pressure is increased until air can pass through the filter and bubbles form in the liquid. The subsequent pressure drop can be converted into the maximum pore size.

A similar method, the capillary flow porometry, can even determine pore size distributions. Therefore, a liquid soaked filter is used and the pressure is measured on both sides. The air stream pressure is slowly increased until air penetrates the filter. If pores of a certain size are exposed, the pressure drops depending on the number of pores. From this, the pore sizes as well as their abundance can be calculated.

Any questions? Please contact us!



Due to the strong interest in our various filter fleece and filter cloth products, we expanded and specified our website in these categories. From now on you can find further technical data about the different filter fleece types (needle felt, waterjet fleece, etc.) as well as our mono and/or multifil filter cloths. We hope you enjoy discovering our products and wish you a pleasant week.


Did you know...

…that besides for filtration, technical nonwovens are used for various hygiene and care products? For our little ones, nonwovens in diapers are enriched with superabsorbents in order to increase the storage capacity. Wet wipes consist of fleece soaked in care lotion and by preparation with antibacterial substances, fleeces can also be used as dressings and bandages. Nonwovens are very versatile in use and support us in many situations in daily life.

Nonwovens have become vital in filtration technology. Detailed information about filter fleece for liquids can be found here!



Congratulations to our colleague Tizian S. on successfully completing the second semester of his master degree in materials science!