Vad är en magnetdriven pump?

En magnetdriven pump är en pump utan mekanisk axeltätning. Istället överförs kraften magnetiskt mellan en inner- och yttermagnet, vilket gör konstruktionen helt hermetiskt tät och minimerar risken för läckage.

Varför väljer man en tätningslös pump?

Tätningslösa pumpar väljs främst för att undvika läckage och minska underhåll. När den mekaniska axeltätningen tas bort elimineras den vanligaste felkällan, vilket ger hög driftsäkerhet och längre livslängd.

Passar magnetdrivna pumpar för kemikalier och farliga vätskor?

Ja. Magnetdrivna pumpar är särskilt anpassade för aggressiva, giftiga eller brandfarliga medier eftersom konstruktionen är hermetiskt tät och kan byggas i material som tål tuffa kemikalier, även i ATEX-miljö.

Hur mycket underhåll kräver en magnetdriven pump?

Underhållsbehovet är lågt. Eftersom pumpen saknar axeltätning behövs färre reservdelar och färre planerade stopp, vilket sänker kostnaderna och minimerar oplanerade driftavbrott.

Hur vet jag vilken magnetdriven pump som är rätt för min applikation?

Val av pump beror på vätska, temperatur, tryck, flöde och processmiljö. Det är viktigt att pumpen dimensioneras korrekt och att rätt material väljs. Vi på Colly Flowtech hjälper gärna till att ta fram den bästa lösningen för just er process.

News & Events

Magnetic drive sealless pumps from Pompe Travaini: High reliability and leak-free operation

20 November 2025

By Mattias Steffl

Magnetic drive seal-less pump from Colly Flowtech installed in industrial process environment.

In many manufacturing processes, every last drop is crucial. For example, in the chemical, pharmaceutical, biotechnology and food industries, there is simply no room for leakage or production downtime. That's why magnetic drive, seal-less pumps have become the natural choice for anyone who wants a safe, leak-free and stable process environment.

In this blog post, we explore why Pompetravaini's magnetically driven sealless pumps are so appreciated, how the technology works and, above all, what concrete benefits you get on the ground.

What is a magnetic drive pump and how does it work?

In magnetic drive pump uses a hermetically sealed design where the power of the motor is transmitted to the impeller and impellers via two magnetic joints, an encapsulated rotating inner magnet and a rotating outer magnet attached to a drive shaft on the outside of the pump chamber.

A solid partition, often referred to as a ”jug” or ”isolation hood” usually made of Hastelloy C or similar material, separates the fluid between the magnetic fields, which means that

no through shaft runs through the pump casing
no mechanical seals needed
hermetically sealed pump construction
there is no contact between the liquid and the surrounding environment

It is an extremely effective solution to achieve leak-free operation.

Five reasons to choose magnetic drive pumps

The reliability that magnetic drive pumps are known for comes mainly from removing the most failure-prone wear part: the mechanical shaft seal.

Below we have listed the five most important factors that together make magnetic drive pumps a stable and safe choice.

1. interchangeability and flexibility

The entire range of Pompetravaini magnetic drive seal-less pumps has been developed and designed in a comprehensive modular system in each series of pumps, allowing for higher flexibility, fewer spare parts and lower costs. In addition, the wide range of TCK seal-less centrifugal pumps is fully compatible with ”standard shaft sealed” centrifugal pumps on the market as these are designed to ISO 2858 as well as ISO 5199. This allows for easy replacement and upgrading without rebuilding existing piping systems.

2. Leak-free operation

By eliminating the mechanical shaft seal, the primary cause of leakage is removed. This results in a more stable process, less downtime and a safer working environment. Especially suitable for hazardous liquids, even in ATEX classified process environment

3. Low maintenance requirements

When wear parts such as shaft seals are eliminated, maintenance needs are also minimized with the right solution. This means fewer unplanned and planned stops, less ongoing maintenance and a lower total cost over the life of the pump.

4. copes with aggressive media

Because the fluid is hermetically sealed in the pump chamber, the pump can be built in material choices that can withstand harsh chemicals and demanding media, even in ATEX-rated process environments.

5. monitoring and measurement capabilities

Many magnetic drive models can easily be equipped with sensors for vibration, temperature, etc. This provides early indications of abnormalities and contributes to a more controlled and predictable operation.

Several Pompe Travaini magnetic drive sealless pumps installed in a process plant.

Design and requirements for your process environment

To get the maximum life and reliability, the pump needs to be dimensioned according to your process and your high demands. We at Colly Flowtech are more than happy to help you on site with our deep expertise and long experience to help you with the best long-term solution.

Pompetravainis The range of sealless magnetic drive pumps is extremely wide and is manufactured in-house outside Milan in a state-of-the-art production facility with extensive experience.

One of the widest range of sealless pumps on the market

The self-manufactured range includes, among others:

ISO Chemistry Centrifugal Pumps TCK Series
Self-priming Multistage Liquid Ring Pumps TBHK Series
Self-priming Side Channel Pumps TBAK Series

Pompetravaini magnetic drive pumps combine a fully sealed design with proven materials and solid mechanics. The result is a pump technology that reduces risks, creates safety, increases operational reliability and simplifies everyday life in our customers' facilities.

Whether you are looking to eliminate recurring UH needs or planning a new installation where leak-free operation is a requirement, magnetic drive pumps are a strong and long-term choice. We are represented locally throughout Sweden together with three service centers, long experience, specialist competence and work closely with our friends at Pompetravaini.

Want to know more? I'm happy to help you find the right model and material choice for your application. Get in touch with me (mattias.steffl@colly.se), and we will take it forward together.

This text was written by Mattias Steffl (mattias.steffl@colly.se), Business Area Manager Pump at Colly Flowtech.

Frequently asked questions about magnetic drive sealless pumps

What is a magnetic drive pump?

A magnetic drive pump is a pump without a mechanical shaft seal. Instead, power is transmitted magnetically between an inner and outer magnet, making the design completely hermetically sealed and minimizing the risk of leakage.

Why choose a sealless pump?

Seal-less pumps are mainly chosen to avoid leakage and reduce maintenance. Removing the mechanical shaft seal eliminates the most common source of failure, resulting in high reliability and longer service life.

Are magnetic drive pumps suitable for chemicals and hazardous liquids?

The answer is yes. Magnetic drive pumps are particularly suited for aggressive, toxic or flammable media as the design is hermetically sealed and can be built in materials that can withstand harsh chemicals, even in ATEX environments.

How much maintenance does a magnetic drive pump require?

Maintenance needs are low. Since the pump has no shaft seal, fewer spare parts are needed and fewer planned stops are required, reducing costs and minimizing unplanned downtime.

How do I know which magnetic drive pump is right for my application?

Pump selection depends on the fluid, temperature, pressure, flow and process environment. It is important that the pump is correctly dimensioned and that the right material is selected. We at Colly Flowtech are happy to help you find the best solution for your particular process.