Stainless steel pump chains (inox) –
corrosion-resistant and durable

Our cromox® stainless steel pump chains made of high-quality stainless steel are designed for use in the wastewater industry (e.g. in sewage treatment plants, waterworks). The corrosion-resistant pump chains are used for lifting and lowering (submersible) pumps and aeration equipment.

High-precision pump lifting chain
Center section of a pump chain with connecting link
End connection of the pump lifting chain
High-precision pump lifting chain
Center section of a pump chain with connecting link
End connection of the pump lifting chain

Stainless steel pump chains – manufactured for your application

Our stainless steel pump chains are made of high-strength stainless steel 1.4404 (AISI 316L) or 1.4462 Duplex (AISI 318LN) and have straight sided master links at the beginning of the chain, in segment distances and at the end of the chain for index lowering or lifting of submersible pumps. They comply with Grade 60, are welded and equipped with a load capacity plate and stamped with the manufacturer's mark, traceability code and grade and comply with Machinery Directive 2006 / 42 / EC and LEEA 069-2 specification for stainless steel submersible pump lifting chains

The standard length of the chain segments is 1,000 mm (basic part as well as attachment part). Bespoke assemblies can be manufactured to meet your precise requirements.

  • Blasted for even higher corrosion resistance
  • Quality assurance through testing in our own Lloyd's Register-certified laboratory
  • Cost-efficient maintenance
  • Long lasting

We are a qualified member of the renowned professional association LEEA. Through this association, the safety of an entire industry and thus also our own standards are constantly driven forward.

All our products are tested in our in-house Lloyd's Register certified testing laboratory. According to international standards, with up to 160 tons load capacity.

Our cromox® products are produced in Germany and are international leaders in the field of stainless steel products. We ensure consistently high quality and technical solutions to the highest standards.

cromox® Pump Chain CPK, Grade 60
AISI 316L / AISI 318LN Duplex, welded, tested, blasted

TypeWLL (t)Master link (mm)Chain (mm)Joining link 
CPK 3 0,20 5 x 42 x 22 3 x 14 -  
CPK 4 0,40 8 x 54 x 30 4 x 16 5 x 22 x 9  
CPK 5 0,63 10 x 80 x 50 5 x 15 6 x 26 x 13  
CPK 6 0,90 13 x 110 x 60 6 x 18 8 x 35 x 19  
CPK 7 1,25 13 x 110 x 60 7 x 21 8 x 35 x 19  
CPK 8 1,55 13 x 110 x 60 8 x 24 10 x 44 x 25  
CPK 9 2,00 16 x 110 x 60 9 x 27 13 x 54 x 25  
CPK 10 2,45 16 x 110 x 60 10 x 30 13 x 54 x 25  
CPK 13 3,85 22 x 160 x 90 13 x 39 16 x 70 x 34  
CPK 16 6,00 22 x 160 x 90 16 x 48 18 x 85 x 40  
CPK 18 8,00 26 x 180 x 100 18 x 54 22 x 115 x 50  
CPX 22*11,0036 x 260 x 14022 x 6626 x 140 x 65
CPX 26*15,0045 x 320 x 17526 x 7832 x 140 x 70


Custom fittings and bespoke versions on request
Standard length ≈ 1.000 mm, other lengths on request
L1 = approx. 1 m + one additional master link
*L1 = approx. 2 m + one additional master link, L2 = approx. 2 m, AISI 318LN Duplex

Ordering information: Many sizes also available in Duplex.


Do you have any questions or wish individual advice?

We will be happy to help you with any concerns.

Individual testing ensures performance, economic efficiency and longevity.

cromox® stainless steel pump chainare proof tested 2.5 x WLL and have a factor of saeftz of 4:1. This testing procedure and quality inspection are carried out in our in-house Lloyd's Register-certified laboratory. Every pump chain is tested individually to assess its performance and reliability. The first step is to inspect the pump chain for signs of manufacturing defects or damage. This is followed by the functional test, in which the performance is checked. In the subsequent load test, the chain is exposed to normal and extreme conditions to check durability and performance. Only after all tests have been evaluated is the stainless steel pump chain approved for use. The entire process, from design and production to product testing, takes place at Ketten Wälder GmbH in Germany.

Bespoke pump chains can be designed for your individual requirements

A pump system can be a special and individual design: it usually includes a number of pumps and pump chains arranged in a different sequence. Each pump increases the pressure of the liquid so that it can be transported over a greater distance. Depending on the requirements, these systems can consist of different types of pumps, such as centrifugal pumps, piston pumps or diaphragm pumps.

The design of a pump chain requires a precise knowledge of the specific requirements of the project. This includes an accurate assessment of the required flow rate and pressure, as well as taking into account factors such as the type of fluid, the environmental conditions and the available resources.

Contact us: we will advise, plan, design and manufacture your customised stainless steel pump chain.


What are pump chains?

Pump chains are special fully welded chain assemblies used to raise and lower (submersible) pumps normally located in pumping stations in fresh water and wastewater industry.

They act as a link between the submersible pump and the lifting gear. In order to perform the lifting operation efficiently, the pump chains must be fitted with suspension (master links) links at regular intervals, normall every 1,000 mm. This allows the chain to be secured to an appropriate anchorage point above the shaft and at each stage during the lifting operation.

Two-strand pump chains are also used for larger and heavier pumps or when a change in pump position is required. This variant is constructed in the same way at the top as the single-strand version, but the chain ends at the bottom in two strands, often referred to a a ‘Y’ chain assembly. each of which is connected to the pump. The end fittings can be load hooks with safety device, shackles or suspension links, depending on the requirements of the particular pump.

Like other sling chains, pump chains are manufactured in different grades. A higher grade allows a smaller chain with the same load capacity. Since submersible pumps and thus also the associated pump chains are used in various liquids, high requirements must be met in terms of corrosion resistance and hygiene. For this reason, pump chains are increasingly made of stainless steel, as they offer a longer service life.

Where are pump chains used?

Pump chains are used in various areas, especially where submersible pumps are needed to lift and lower loads. One of the main areas where pump chains are used is in the fresh water and wastewater industry: in sewage treatment plants, wastewater systems and water treatment plants, pump chains are used to move submersible pumps in wells and to pump water or wastewater.

Their use depends on the specific requirements and conditions of the particular application. As submersible pumps are a reliable and efficient method of lifting and lowering liquids, pump chains are of great importance in many industries.

Pumping maintenance is critical to operating an efficient wastewater treatment plant. Failure of the pumps can result in waste spillage into the water course and rivers or into the household. Preventing this happening is very important and protects the environment. Reliable chain system is critical to enable the pumps continue to run with limited down time.

What are the advantages of stainless steel pump chains?

Stainless steel pump chains have many advantages:

  1. Corrosion resistance: high quality stainless steel is known for its excellent corrosion resistance. This means that these pump chains will not rust or corrode when used in the harshest environments.
  2. Durability: due to their robust construction and high-quality, stainless steel pump chains can perform at high levels over long periods of time without breaking or wearing out.
  3. Heat resistance: stainless steel can withstand high temperatures,
  4. Hygiene: stainless steel is easy to clean and sterilise, making these pump chains ideal for applications in the food industry, hospitals and wherever cleanliness is important.
  5. Reduced maintenance: because they do not rust or corrode, stainless steel pump chains require relatively little maintenance. This can lead to long-term cost savings.
  6. Environmental friendliness: compared to other materials, stainless steel is easier to recycle and therefore more environmentally friendly.

Stainless steel pump chains – rust-resistant and extremely durable

With a cromox® stainless steel pump chain, you can be sure that your equipment will work reliably and last a long time.


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Please note our new price list, which is valid from 01 August 2023.