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DN25 – 6-Rod Neodymium Magnetic Filter – Water-Based Printing Ink
DN25 – 6-Rod Neodymium Magnetic Filter – Water-Based Printing Ink
General Features
- Designed for ferromagnetic metal contamination control in water-based printing ink production and transfer lines.
- Suitable for evaluation after mixing or dispersion and before the ink filling stage.
- Helps capture suitable ferromagnetic iron and steel particles that may enter the ink during production.
- Equipped with 6 neodymium magnetic rods, each measuring Ø25×160 mm.
- Features an AISI 304 stainless steel filter housing.
- Compact inline configuration with DN25 inlet and outlet connections.
- Manually cleanable magnetic rod assembly for periodic removal of captured metal particles.
- Permanent neodymium magnetic system requires no electrical power to generate its magnetic field.
Technical Features
- Product Type: Neodymium Inline Magnetic Filter.
- Inlet Connection: DN25.
- Outlet Connection: DN25.
- Number of Magnetic Rods: 6.
- Magnetic Rod Diameter: Ø25 mm.
- Magnetic Rod Length: 160 mm.
- Magnetic Material: Neodymium (NdFeB).
- Housing Material: AISI 304 Stainless Steel.
- Cleaning Method: Manual Cleaning.
- Main Application: Water-Based Printing Ink Production and Transfer.
- Typical Process Position: After Mixing / Dispersion and Before Filling.
- Primary Function: Retention of Suitable Ferromagnetic Metal Particles.
The DN25 6-Rod Neodymium Magnetic Filter is designed to help capture ferromagnetic iron and steel particles in water-based printing ink production and transfer lines. Its six Ø25×160 mm neodymium magnetic rods provide multiple magnetic collection surfaces inside an AISI 304 stainless steel housing with DN25 inlet and outlet connections. The manually cleanable filter can be evaluated for installation after mixing or dispersion and before filling, helping reduce the transfer of suitable ferromagnetic wear particles to subsequent production stages.
| Technical Specification | Value |
|---|---|
| Product Type | Neodymium Inline Magnetic Filter |
| Nominal Inlet Connection | DN25 |
| Nominal Outlet Connection | DN25 |
| Number of Magnetic Rods | 6 |
| Magnetic Rod Dimensions | Ø25×160 mm |
| Magnetic Rod Diameter | Ø25 mm |
| Magnetic Rod Length | 160 mm |
| Magnetic Material | Neodymium (NdFeB) |
| Magnetic System | Permanent Magnetic Rods |
| Housing Material | AISI 304 Stainless Steel |
| Cleaning Method | Manual Cleaning |
| Main Application | Water-Based Printing Ink |
| Typical Process Position | After Mixing / Dispersion and Before Filling |
| Potential Contamination Sources | Mixers, Dispersers, Pumps, Valves and Metal Pipework |
| Target Contaminants | Suitable Ferromagnetic Iron and Steel Particles |
| Electrical Power for Magnetic Field | Not Required |
1. Why Is a Magnetic Filter Used in Water-Based Printing Ink Production?
Water-based printing ink production involves several processing stages, including raw material preparation, pigment and binder mixing, dispersion, transfer, intermediate storage and filling.
During these operations, the ink may come into contact with metal components in mixers, dispersers, pumps, valves and pipelines.
Under certain operating conditions, small ferromagnetic iron or steel particles may enter the ink through mechanical wear, maintenance activities or other contamination sources.
The DN25 6-Rod Neodymium Magnetic Filter provides an additional magnetic control point that can help retain suitable ferromagnetic particles before they reach subsequent production equipment or the filling stage.
2. What Is the DN25 6-Rod Neodymium Magnetic Filter?
The DN25 6-Rod Neodymium Magnetic Filter is an inline magnetic separation product designed for water-based printing ink production and transfer applications.
Its confirmed technical characteristics include:
- DN25 inlet and outlet connections
- Six neodymium magnetic rods
- Magnetic rod dimensions of Ø25×160 mm
- Neodymium (NdFeB) magnetic system
- AISI 304 stainless steel housing
- Manual cleaning
The filter is intended to help retain suitable ferromagnetic metal particles while allowing the ink to continue through the production line.
Actual installation requirements must be evaluated according to the ink formulation, flow conditions, operating pressure and connection arrangement.
3. How Does the Neodymium Magnetic Ink Filter Work?
The filter contains six neodymium magnetic rods positioned inside the filter housing.
As the water-based printing ink passes through the housing, suitable ferromagnetic particles can be attracted to the magnetic rod surfaces.
The ink continues toward the next processing stage while captured metal particles remain on the magnetic surfaces until cleaning.
The basic operating principle is:
Ink Flow → DN25 Magnetic Filter → Ferromagnetic Particle Retention → Continued Ink Flow
The actual separation result depends on the particle size, magnetic properties, viscosity, flow rate and distance between the particles and the magnetic rods.
The filter should not be described as removing every metal particle under all operating conditions.
4. Why Is Magnetic Filtration Considered After Mixing or Dispersion?
Mixing and dispersion are important stages in water-based printing ink production.
During these operations, the product may be exposed to rotating shafts, disperser components, mixing equipment and other mechanical surfaces.
Depending on equipment condition and operating circumstances, small ferromagnetic wear particles may enter the ink.
Placing a magnetic filter downstream of the mixing or dispersion stage can provide an additional opportunity to capture suitable particles before they reach an intermediate tank or the filling process.
An example process arrangement is:
Raw Material Preparation → Mixing / Dispersion → DN25 Magnetic Filter → Intermediate Tank → Filling
The final installation point should be selected according to the actual production layout.
5. Can the DN25 Magnetic Filter Be Installed Before Ink Filling?
Yes. The DN25 magnetic filter can be evaluated for installation before the filling stage of a compatible water-based printing ink line.
A possible process arrangement is:
Intermediate Tank → DN25 Magnetic Filter → Filling Machine
In this configuration, the ink passes through an additional magnetic control point before entering the final packaging process.
The filter may help retain suitable ferromagnetic particles that entered the product during previous production or transfer stages.
However, the system does not guarantee that the filled ink will be completely free from metallic contamination.
Additional inspection or quality-control methods may be required according to the product specification.
6. Where Can Ferromagnetic Metal Particles Enter a Printing Ink Line?
Small iron or steel particles may enter printing ink during different production and transfer operations.
Potential sources include:
- Mixing and dispersing equipment
- Pump components
- Valves and fittings
- Metal pipelines
- Mechanical wear surfaces
- Maintenance and assembly operations
The presence and amount of contamination depend on the design, condition and maintenance of the equipment.
A magnetic filter installed at an appropriate point can help reduce the movement of suitable ferromagnetic particles into later processing stages.
Identifying the contamination source remains important because magnetic filtration should complement, rather than replace, preventive maintenance.
7. Why Does This Magnetic Filter Use Six Magnetic Rods?
This model contains six neodymium magnetic rods.
Multiple rods provide several magnetic collection surfaces within the filter housing.
As ink flows through the magnetic separation region, suitable ferromagnetic particles may approach one of these surfaces and become retained.
The arrangement can be useful for creating additional magnetic contact opportunities within a compact inline filter.
However, the number of rods alone does not determine the filter’s separation performance.
Rod arrangement, magnetic field characteristics, ink viscosity, flow rate and particle properties must also be considered.
The exact internal rod layout should be confirmed using the product’s technical drawing.
8. What Is the Importance of the Ø25×160 mm Magnetic Rod Dimensions?
Each magnetic rod in this filter has confirmed dimensions of Ø25×160 mm.
The diameter is 25 mm, while the rod length is 160 mm.
These dimensions are relevant when evaluating the available magnetic collection surfaces and the physical configuration of the filter assembly.
Six rods of this size are used in the DN25 model described here.
The rod dimensions do not, by themselves, establish a guaranteed magnetic field strength, minimum captured particle size or separation efficiency.
These performance characteristics depend on additional design and process parameters.
9. What Are the Advantages of a DN25 Inline Connection?
DN25 is the nominal connection size specified for both the inlet and outlet of this magnetic filter.
This compact connection size can be considered for smaller or controlled product transfer lines, depending on the process design.
Potential installation locations include:
- Intermediate tank outlets
- Ink transfer lines
- Dosing systems
- Smaller production lines
- Transfer lines before filling
The actual pipe dimensions, connection standard and sealing arrangement must be confirmed before installation.
The DN25 designation alone does not establish whether the connections are threaded, flanged, clamped or manufactured to a particular sanitary standard.
10. Does a DN25 Connection Determine the Filter’s Flow Capacity?
No. DN25 identifies the nominal connection size, but it does not independently determine the maximum allowable flow rate.
The achievable operating flow depends on several factors, including:
- Ink viscosity
- Internal filter geometry
- Magnetic rod arrangement
- Pressure drop
- Pump characteristics
- Pipeline configuration
- Required operating conditions
A suitable flow rate must be determined using the actual ink properties and technical design information.
No verified maximum flow capacity has been specified for this particular product.
11. Why Is Printing Ink Viscosity Important for Magnetic Filtration?
Water-based printing inks can have different viscosities depending on their formulations and operating temperatures.
Viscosity influences how the ink moves through the filter housing and around the magnetic rods.
Higher viscosity may affect:
- Flow behaviour
- Pressure drop
- Pump loading
- Residence time within the filter
- Cleaning requirements
Consequently, the viscosity of the actual printing ink should be evaluated before selecting the filter.
A product suitable for one water-based ink formulation should not automatically be considered suitable for every other formulation.
No maximum approved viscosity value has been confirmed for this model.
12. How Does Flow Rate Affect Ferromagnetic Particle Separation?
Flow rate can influence the time available for particles to interact with the magnetic field.
At higher flow rates, the ink may pass through the separation region more quickly.
Depending on the internal geometry and particle characteristics, this may affect the likelihood of ferromagnetic particles approaching the magnetic rod surfaces.
Flow rate should therefore be evaluated together with viscosity, particle size, magnetic properties and pressure drop.
The filter’s six magnetic rods provide multiple collection surfaces, but they do not establish a guaranteed separation efficiency at an unspecified flow rate.
13. Why Should Pressure Drop Be Evaluated Before Installation?
Any inline equipment introduced into a liquid transfer system can affect the hydraulic resistance of the line.
In this filter, ink must flow through the housing around the internal magnetic rods.
The resulting pressure drop depends on the internal flow passages, viscosity, flow rate and operating conditions.
Before installation, the system designer should consider whether the existing pump can maintain the required flow under these conditions.
The filter housing, seals and connections must also be suitable for the actual line pressure.
A maximum working pressure and a pressure-drop curve have not been verified for this model.
14. Can This Filter Be Used for Water-Based Flexographic Printing Ink?
The product is designed for water-based printing ink lines.
Water-based flexographic printing ink is one potential application that may be evaluated.
Before use, the ink’s viscosity, chemical composition, temperature, flow rate and compatibility with AISI 304 stainless steel must be checked.
The filter’s magnetic function targets suitable ferromagnetic metal particles rather than the ink’s normal formulation components.
Suitability should be confirmed using the actual production conditions.
It should not be assumed that all flexographic ink formulations have identical chemical or processing requirements.
15. Is the DN25 Magnetic Filter Suitable for Packaging Printing Ink?
Water-based packaging printing inks may pass through mixing, dispersion, transfer and filling processes similar to those used in other liquid ink production lines.
If suitable ferromagnetic particles may enter the product, a magnetic filter can be considered as an additional control point.
The DN25 model may be evaluated for compatible transfer arrangements where its connection size and process characteristics are appropriate.
However, packaging ink formulations differ in viscosity, additives and chemical composition.
The suitability of the AISI 304 housing and the filter’s operating conditions must be confirmed for the specific formulation.
16. Can the Magnetic Filter Be Used for Water-Based Label Printing Ink?
Certain water-based label printing ink formulations may be candidates for magnetic contamination control.
The filter can be evaluated where the ink’s chemical composition, viscosity and operating conditions are compatible with the equipment.
Potential process locations include transfer lines downstream of mixing equipment or before filling.
The magnetic system is intended to retain suitable ferromagnetic particles that may originate from production equipment or other contamination sources.
The filter does not replace formulation-specific compatibility testing.
Its suitability for a particular label printing ink must be determined through technical assessment.
17. Does the Magnetic Filter Capture the Printing Ink Itself?
The purpose of the magnetic filter is not to remove the printing ink itself.
Its magnetic rods are intended to attract suitable ferromagnetic metal contaminants from the flowing product.
The general operating sequence is:
Water-Based Printing Ink → Six Magnetic Rods → Ferromagnetic Particles Retained → Ink Continues
The behaviour of individual pigments, additives or special formulations must not be assumed solely from the fact that the product is described as printing ink.
A magnetic filter is not a substitute for a conventional filtration system designed to remove nonmagnetic particles or agglomerates.
18. Which Ferromagnetic Metals Can the Filter Capture?
The neodymium magnetic system is intended to attract particles with suitable ferromagnetic properties.
Examples include:
- Iron fragments
- Carbon steel particles
- Ferromagnetic steel shavings
- Suitable fine metal wear particles
- Ferromagnetic particles originating from pumps or mixing equipment
Whether an individual particle is retained depends on its size, shape, magnetic properties and distance from the magnetic rods.
The filter must not be described as capturing all metal types or all particle sizes.
No certified minimum particle size or guaranteed capture efficiency has been confirmed.
19. Can the Filter Capture Fine Metal Wear Particles?
Fine ferromagnetic wear particles may be generated by mechanical equipment used in printing ink production.
Examples include suitable iron or steel particles originating from mixers, dispersers, pumps or valves.
The neodymium magnetic rods can help retain such particles when their magnetic properties and operating conditions allow sufficient attraction.
However, small particle size does not automatically guarantee capture.
The result depends on the magnetic characteristics of the particle, ink viscosity, flow rate and internal filter geometry.
A guaranteed minimum particle size has not been specified for this product.
20. Can the Filter Remove Aluminium, Copper or Brass?
Aluminium, copper and brass are not ferromagnetic under ordinary operating conditions.
Consequently, they are not attracted to conventional permanent magnets in the same manner as iron and ferromagnetic steel.
The DN25 neodymium magnetic filter should therefore not be described as a universal metal separator.
Stainless steel also varies in magnetic behaviour according to alloy composition and metallurgical structure.
If the process requires the removal of non-ferromagnetic metal particles, other separation or detection technologies may be necessary.
21. What Are the Advantages of the AISI 304 Stainless Steel Housing?
The DN25 magnetic filter has a confirmed AISI 304 stainless steel housing.
AISI 304 is widely used in industrial process equipment because of its general corrosion resistance and practical fabrication characteristics.
For this product, the housing provides the mechanical structure around the magnetic rod assembly.
However, water-based printing ink formulations may contain different additives, cleaning chemicals and other ingredients.
Therefore, compatibility between the actual ink formulation and AISI 304 must be assessed before installation.
The housing material alone does not establish a maximum working pressure, chemical resistance to every formulation or a particular sanitary certification.
22. Why Must Chemical Compatibility Be Checked for Printing Ink Applications?
The composition of water-based printing ink varies depending on the application and manufacturer.
Formulations may contain pigments, binders, dispersing agents and other additives.
Some cleaning chemicals used during production changeovers may also differ from the chemicals present during normal operation.
The compatibility assessment should consider the filter’s AISI 304 housing and all wetted components whose materials must be confirmed.
Operating temperature and cleaning procedures are also relevant.
The exact seal material and chemical compatibility limits have not been verified for this product.
Accordingly, these details should be confirmed before approving the filter for a particular formulation.
23. Can the DN25 Magnetic Filter Be Installed After a Pump?
Yes, installation downstream of a pump may be considered, depending on the system design.
One possible arrangement is:
Ink Transfer Pump → DN25 Magnetic Filter → Filling Equipment
This location may be useful when the objective is to control suitable ferromagnetic wear particles that could originate from the pump or upstream components.
However, the installation must be assessed for flow rate, line pressure, viscosity and pressure drop.
The filter’s pressure rating and connection arrangement should be verified before use.
A pump outlet should not be selected as the installation point solely because it is convenient.
24. Is a Magnetic Filter the Same as a Mechanical Mesh Filter?
No. Magnetic and mechanical filtration operate according to different principles.
The DN25 magnetic filter uses neodymium rods to attract suitable ferromagnetic particles.
A mechanical mesh filter uses openings of a defined size to retain particles according to their physical dimensions.
The magnetic filter should not be assigned a micron filtration rating unless such a rating has been separately established and verified.
It also should not be expected to remove every nonmagnetic solid particle from the ink.
Depending on the process requirements, magnetic and mechanical filtration may be used as complementary technologies.
25. Can a Magnetic Filter Replace a Metal Detector?
Not necessarily. A magnetic filter and a metal detector serve different functions.
The magnetic filter physically attracts and retains suitable ferromagnetic particles that pass close enough to the magnetic rods.
A metal detector uses an electronic detection principle and may be configured to detect different types of metal, subject to its design and operating conditions.
A magnetic filter cannot be assumed to detect or remove every metallic contaminant.
For processes with demanding contamination-control requirements, magnetic separation and metal detection may be evaluated as complementary systems.
26. How Is the DN25 Magnetic Filter Cleaned Manually?
The product has a manually cleanable magnetic rod assembly.
Before cleaning, the production line must be safely stopped, isolated from hazardous energy sources and protected against unexpected restart.
The filter must also be depressurised and, where necessary, drained according to the site’s approved procedures.
The magnetic rod assembly can then be accessed and removed according to the manufacturer’s instructions.
Captured ferromagnetic particles should be carefully removed from the rod surfaces before the filter is inspected, correctly reassembled and returned to service.
Permanent magnets remain magnetically active even when the production equipment is switched off.
Suitable precautions are required to prevent unexpected attraction of ferromagnetic tools and parts.
27. How Often Should the Magnetic Rods Be Inspected and Cleaned?
There is no universal cleaning interval suitable for every printing ink production line.
The required frequency depends on:
- The amount of ferromagnetic contamination in the ink
- Operating hours
- Production volume
- Ink viscosity
- Flow conditions
- Rate of particle accumulation
- Cleaning and changeover procedures
During initial operation, more frequent inspections may help establish a suitable maintenance schedule.
As metal particles accumulate on the rods, the availability of exposed magnetic collection surfaces may be reduced.
Inspection findings should be used to adjust the cleaning frequency to actual operating conditions.
28. How Do You Select the Right Magnetic Filter for Water-Based Printing Ink?
Selecting a magnetic filter requires more than choosing the nominal connection size or number of magnetic rods.
The following information should be considered during technical evaluation:
- Type of water-based printing ink
- Ink formulation and chemical composition
- Operating viscosity
- Required flow rate
- Operating temperature
- Line pressure
- Nominal pipe connection size
- Connection and sealing standards
- Type and size of ferromagnetic contaminants
- Proposed installation position
- Available installation and maintenance space
- Required cleaning frequency
The confirmed specifications of this model are DN25 inlet and outlet connections, six Ø25×160 mm neodymium (NdFeB) magnetic rods, an AISI 304 stainless steel housing and manual cleaning.
The filter is intended for magnetic contamination control in water-based printing ink lines, particularly after mixing or dispersion and before filling.
The following values have not been confirmed for this model: magnetic flux density in Gauss, neodymium grade, maximum operating temperature, maximum working pressure, flow capacity, pressure-drop characteristics, seal material, exact connection standard and guaranteed separation efficiency.
Magneteksan – Magnetic Filtration Solutions for Printing Ink Production
The DN25 6-Rod Neodymium Magnetic Filter provides a compact magnetic separation option for controlling suitable ferromagnetic particles in compatible water-based printing ink production and transfer lines.
Its six Ø25×160 mm magnetic rods create multiple collection surfaces within an AISI 304 stainless steel housing, while the manually cleanable design allows periodic removal of captured particles.
For a technical evaluation or quotation, customers can provide Magneteksan with the ink type, viscosity, flow rate, operating temperature, line pressure, connection requirements and information about the metal contaminants that need to be controlled.
Magneteksan – Industrial Magnetic Filtration and Separation Solutions for Liquid Processing Lines.
