Pumps and filters for best performance aluminium anodizing equipment
Aluminium anodizing process steps require the appropriate agitation/circulation and filtration solutions. As a result of increasing quality specifications, OEMs or manufacturers look for solutions which can optimize installations regarding these aspects, in the most economical way. Hendor totally understands and agrees with this way of thinking. However, we consider quality and durability of pumps and filters of equal importance. By means of durability and designs, engineered for highest efficiency, a long service life with optimized power consumption allows for the lowest total cost of ownership possible.
The anodizing process entails (electro)chemical conversion of metal surfaces (aluminium, magnesium, and titanium) into corrosion-resistant, durable finishes in several steps. Each phase calls for specific equipment, supported by the right chemical pump or filter. Hendor provides an array of pumps and filter systems which assist in the anodizing process.
Contact Hendor for personal advice regarding your anodizing plant
Horizontal disc filter instead of stainless steel cartridge filter
Surface smut regularly occurs in the anodizing hot sealing process step. When accumulated in the electrolyte, this smut necessitates labor intensive post-treatment, and affects coating adhesion and quality. In addition, contaminated baths require replacement and re-heating. Hot seal baths are typically filtered at 1-1,5 turnover per hour to avoid sealing smut. Due to the high temperature (generally 96-100 °C), manufacturers use stainless steel cartridge filtation systems. However, there is a better alternative in our opinion. Hendor provides a very robust PP horizontal disc filter system with mechanical seal pump which well withstands the hot seal bath temperature, because it is made from Simona® high-grade Alpha PlusTM PP.
The advantages of PP filter systems over stainless steel filter units are:
• significantly lower investment costs;
• lower operating costs due to use of low cost filter paper;
• less energy losses due to PP’s excellent thermal insulation properties;
• no corrosion of pump and filter;
• less disposal costs (cartridges are voluminous chemical waste);
• ease of handling due to partitioned filter disc stacks.
Hendor’s PP horizontal disc filter systems are standard available with capacity up to 30 m3/h. Though initially developed for hot seal application, these filter systems are also well suited for use with cold seal baths, electrolytic coloring, and rinse tanks.
The best filter media for anodizing
For hot- and cold seal coloring tanks, and rinse tanks, both cartridge filtration and disc filtration can be used – at Hendor we manufacture both. Yet, we recommend using discs. Why? The use of filter paper results in low filter media costs, low waste volume, and lower disposal costs. Down time of the filter unit is avoided by having an additional disc stacks available for immediate exchange.
Filtration system with adsorption media for residual oil and grease removal
Organic contaminants, originating e.g. from the extrusion process or subsequent handling, can pollute electrolytes and lead to inferior anodizing and/or coloring quality. Hendor provides a PP filter unit with specially activated adsorption fibers. These fibers are made of plasma-charged PP, which adsorb non-emulsified oils and greases up to 5-6 times their own weight. Using this effective filtration system results in:
• improved anodizing and/or coloring process;
• improved product quality;
• extended bath lifetime;
• reduced chemistry consumption and waste generation;
• less water usage.
Small pump with eductors for airless bath circulation / agitation
For optimum and homogeneous anodizing process performance, and subsequent stable product quality, sufficient bath circulation/agitation is of utmost importance. Therefore, Hendor recommends a smaller sized pump in combination with eductors instead of a large circulation pump. Due to the venturi design of the eductors, the resulting circulation flow can be 5 times the pump output.
Airless pump / eductor systems are ideal to replace conventional air agitation, thereby avoiding the inherent disadvantages associated with air agitations. The advantages of using pump/eductor tank circulation are:
• less to no acid mist above the tank (sulphuric acid mist is carcinogenic);
• bath conductivity improvement leading to faster processing;
• lower energy consumption;
• more stable process due to less temperature variation;
• no dirt intake by polluted pressurised air.
For bath circulation we advise our well-known robust vertical PP pumps. In those situations where the tanks do not allow sufficient space for these vertical pumps, the special Out-of-Tank versions can be used, maintaining all advantages intrinsic for Hendor’s vertical pumps, without requiring tank space. Due to the single, stainless steel shaft, oversized motor bearings, and absence of bearings or seals in the volute, these pumps are very reliable and can essentially operate maintenance-free. Pumps and eductors are available in various sizes to suit each bath geometry.
The best solutions for anodizing processes provided by Hendor
In sum, Hendor provides several high quality solutions for anodizing processes: robust PP horizontal disc filter system with mechanical seal pump, disc filtration and filter paper, special PP filter unit with oil adsorption fibers, vertical pumps (in tank or out of tank), and eductors.
Hendor understands that every OEM and manufacturer has different requirements. Therefore, we personally advise you on the best solutions that suit your equipment, based on our 70 plus years of expertise in the surface fishing industry. Contact Hendor for a consultation with one of our chemical pump and filter experts.
Hendor expands network with Galber in Mexico
Hendor has entered into a partnership with Galber from Mexico as of January 1, 2023. Together, the companies will work to optimize the supply of high-...
The driving force behind 75 years of Hendor
75 years of Hendor: Marja Kaethoven, Hessel Bohncke and Paul van Ham proudly look back on the heritage they hope to pass on to the next generation.
Anodizing Hot Seal more sustainable and profitable? Start with Filtration!
By using the Hendor Hot Seal filtration systems, anodizing plants reduce hot seal dilution requirements by at least 10 times.
This is why you should use vertical pumps for scrubber applications
It still is pretty common to see horizontal pumps being used in scrubber applications. Hendor believes that vertical sealless immersion, dry run safe...
How selecting the right filter media reduces your TCO
Choosing the right filter media will lower your Total Cost of Ownership (TCO). We provide the right solution with our wide range of filter media.
Hendor Excellence filter experience
Encore une semaine et c'est l'heure. Hendor lance sa nouvelle série de filtres-HE pour l'industrie du traitement de surface. Il s...
Comment récupérer l'investissement dans le nouveau filtre-HE?
L'achat de nouvelles pompes et de nouveaux filtres nécessite toujours un investissement. Pour les constructeurs de machines et les utilisat...
Avantages des filtres HE pour l'industrie du traitement de surface
Les nouveaux filtres HE de Hendor sont la première alternative verte aux pompes et aux filtres pour l'industrie du traitement de surface. E...
L'avenir est vert
Le changement climatique est là ; impossible de l'ignorer. Comme toute autre industrie, l'industrie du traitement de surface en porte &...
Hendor partners up with Pforzheimer OTSM for next level service & support
Both companies will share each others’ expertise in order to innovate for the future.
Best suitable pumps and filters for Reel-to-Reel plating applications
Hendor was the first to set the standard for vertical pumps in Reel-to-Reel plating lines, helping Reel-to-Reel line operators and OEM’s with best i...
Pumps and filters for best performance aluminium anodizing equipment
Hendor provides several pump and filter solutions for aluminium anodizing. Read our recommendations and their benefits for your anodizing equipment.
Underrated in surface finishing: preventive maintenance
Preventive maintenance is crucial for chemical pumps and filters. It prevents unexpected downtime and complete breakdown. Hendor explains the process.
Beneficial for electroless nickel applications: D16 SS
Latest fabrication technologies ensure that the Hendor D16 stainless steel vertical pump range is sealless, dry-run safe, and maintenance free.
This is why you should inspect your centrifugal pumps weekly
Centrifugal pumps & chemical filtration systems should be inspected weekly. Here, you find the correct way to perform the centrifugal pump inspection.
Latest trends in the surface finishing industry identified
September has been special for society as well as the industry. Governments have been lifting restrictions on physical meetings and events.
Hendor celebrates 73 years of craftsmanship
It is our 73th anniversary in the surface finishing industry. We have gathered a lot of knowledge and experience about our products & customers.
Our part in the green industry: electric motors
As from Juli 2021, new European energy standards apply for electric motors. Hendor took measures to do its part in innovating for future generations.
It's always a pleasure doing business with Hendor
The first trimester of 2021 has proven to be just as eventful as 2020. Therefore, our business director reflects on his first four months at Hendor.
Maintenance-free pumps for powder coating spray tunnels
Whenever you are building a powder coating plant, you have two options when it comes to the spray tunnel pumps: a horizontal- or vertical pump.
Hendor HRC: stop expensive precious metal loss
Companies are continuously looking for cost saving measures in their plating shops. Hendor offers a solution with the Hendor Recovery Cell (HRC).
Hendor is ahead of new EU electric motor regulations
Hendor decided to transition its 0,12 .. 0,55 kW electric motors directly to IE3, surpassing the legal minimum of IE2.
Our manufacturing process explained: Assembly & Testing
How do our pumps & filters go from PP to an end product? Step 5: assembly and testing.
Our manufacturing process explained: wet paint coating
How do our pumps & filters arise from PP to an end product? Step 4: wet paint coating the electric motor.
Our manufacturing process explained: plastic welding
How do our pumps & filters arise from PP to an end product? Step 3: plastic welding.
Our manufacturing process explained: mechanical machining
How do our pumps & filters arise from polypropylene (PP) to an end product? Step 2: mechanical machining.
From polypropylene to Hendor end product
How do our pumps & filters arise from polypropylene (PP) to an end product? Step 1: injection molding.
Kees Stigter joins Hendor as our new Sales Director
We welcome a new member to the Hendor team: Kees Stigter. He takes the role of Sales Director, and will be responsible for our global product sales.
The Hendor standard: safe & easy installation and maintenance
When you buy new chemical pumps, you have to take into account the piping. We deliver all our pumps with pre-fabricated three-piece unions.
Hendor DM-series: best of both worlds
Due to the frequent use of different precious metal finishes from various electrolytes, a standard centrifugal pump is not always appropriate.
Hendor celebrates 25 years of presence in North America
This year marks the 25th anniversary of Hendor-PE Inc.. We proudly look back at the way our partners have carried out the Hendor legacy overseas.
Hendor customization: this is how we do it
With decades of experience in designing pumps and filters, our engineering department creates customized specialties tailored to your demands.
D13: less energy, more power
Sustainability means a long product lifetime, but also the reduction of emission. We redeveloped our D110 series and replaced it with our D13 series.
Hendor SHX: stainless steel is the new thermoplastic
The market is in need of pumps and filters which are capable of high performance. Therefore, we developed the SHX series, made out of stainless steel.
Hendor improves the powder coating pre-treatment process
We developed filter technology that keeps the quality of the degreasing fluid constant & clean. The filter remains active longer & captures more dirt.
Hendor presents new robust Basket Strainer
In order to protect both magnetic drive and mechanical seal pumps, we want to introduce our new basket strainer.