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MAGSON
Magnetic Centrifugal Pumps

Magnetic centrifugal pumps are used wherever highly corrosive or crystallization-prone fluids need to be pumped without leakage. The MAGSON series uses a magnetic coupling instead of a shaft seal—hermetically sealed and maintenance-free. Eight models in plastic and stainless steel cover flow rates up to 2,000 l/min and head up to 80 mWs.

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Applications and Uses

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MAGSON Plastics

PP/ETFE/PVDF versions. MAGSON MA, MAS, MAU, MP, MPT

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MAGSON Stainless Steel

Stainless steel models. MAGSON MML, MMT

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Accessories

Frequency converters, motor accessories, loose flanges, and replacement parts

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Overview

MAGSON magnetic centrifugal pumps handle highly corrosive fluids without a shaft seal—a drive magnet transmits the motor’s power to the impeller without physical contact. The pump chamber and drive are hermetically sealed off by a can. Eight variants made of plastic (PP, ETFE, PVDF), stainless steel, and plastic-lined cast iron cover flow rates up to 2,000 l/min.

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Hermetically sealed

Magnetic coupling instead of a shaft seal—no leakage possible

Maintenance-free

No wear-prone shaft seal, no seal replacement

Wide Range of Services

Flow rate up to 2,000 l/min, up to 42 mWs, up to 120 °C and higher (stainless steel)

Variety of Materials

Suitable for the medium and application: PP, ETFE, PVDF, stainless steel

Advantages

Efficient

The MAGSON is designed for economical and energy-efficient operation.

  • Spiral housing for high efficiency
  • Lower energy consumption during operation
  • Frequency converter operation available for the optimal operating point
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Sure

Designed for demanding media and critical processes. The hermetically sealed design protects people, equipment, and the environment.

  • No shaft seal, therefore hermetically sealed
  • ATEX version available
  • Media temperatures up to 120 °C as standard, up to 300 °C upon request
Technical Specifications

Reliable

Robust components and well-engineered designs ensure a high level of operational reliability even under demanding conditions.

  • Ellipsoidal-shaped split housing for system pressures up to 25 bar, optionally 50 bar
  • One-piece split housing for greater durability
  • Robust construction for long service life
Technical Specifications

Flexible

Materials, drives, and connections can be customized to meet the requirements of your application.

  • A wide variety of metallic materials are available
  • IEC-standard motors for worldwide availability
  • Three-phase motors come standard with a PTC thermistor for variable-frequency drive operation
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Protected

Built-in protective features prevent damage and enhance operational safety during daily use.

  • Thermal protection safeguards AC motors against overload
  • Motor replacement with the system shut down
  • Reduced downtime during maintenance work
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Easy to maintain

Maintenance work can be performed efficiently, reducing the effort required in the event of a service call.

  • CARTRIDGE UNIT for quick on-site maintenance
  • Motor replacement is possible without opening the system
  • Expert advice for optimal pump design and long service life
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Applications

Typical applications and areas of use for FLUX magnetic centrifugal pumps.

Chemical Industry

Concentrated acids, alkalis, and corrosive solvents—hermetically sealed, no wave seal.

MAGSON PP/ETFE

Electroplating and surface treatment

Electroplating solutions, pickling baths, and anodizing solutions—corrosion-resistant in PP/ETFE or stainless steel.

MAGSON for Electroplating

Petrochemicals

Flammable and corrosive media – ATEX-certified MAGSON MML and MMT.

MAGSON for the Petrochemical Industry

High-Temperature Processes

Media up to 300 °C – MAGSON MMT with a stainless steel side-channel impeller.

MAGSON MMT

Crystallizing Media

Media prone to crystallization—no wave seals that could crystallize or become blocked.

MAGSON Stainless Steel

High-volume conveyance

Flow rate up to 2,000 l/min – MAGSON MA in plastic for high-volume processes.

MAGSON MA

Media Examples

MAGSON magnetic centrifugal pumps are designed for aggressive and critical media. The appropriate material combination is determined based on the medium, concentration, and temperature.

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MAGSON MA – PP/ETFE, injection-molded version, normal suction
  • Highly Corrosive Acids
  • Alkalis
  • Degreasing baths
  • Chemicals
  • Highly corrosive liquids
  • Media prone to crystallization
  • Sulfuric acid
  • Sodium hydroxide solution
MAGSON MAS – PP/ETFE, injection-molded design, self-priming
  • Highly Corrosive Acids
  • Alkalis
  • Degreasing baths
  • Chemicals
  • Highly corrosive liquids
  • Media prone to crystallization
  • Toxic media from double-walled tanks
  • Environmentally hazardous media from double-walled tanks
MAGSON MP – PP/PVDF, made from solid material

The MP series is used when the flow rates of the MA series are no longer sufficient. It is suitable for more demanding applications and can also be manufactured in an ATEX-compliant version. The main materials are PP and PVDF.

MAGSON MML – Stainless Steel
  • Highly Corrosive Media
  • Media prone to crystallization
  • Media at elevated pressure
  • Media at elevated temperatures
  • Media for which plastic is not suitable
  • Chemically demanding liquids
  • Media suitable for stainless steel, Hastelloy, or Inconel, depending on the design

Knowledge and Technology

Selecting the right MAGSON magnetic drive centrifugal pump depends on the fluid, pressure, temperature, and material requirements. The following sections explain the principle of magnetic coupling and compare the eight variants.

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Operating Principle

Seal-less Magnetic Centrifugal Pumps: Reliable Pumping Without a Shaft Seal

In conventional centrifugal pumps, the shaft seal is a critical component. Maintenance requirements increase, particularly with highly aggressive or crystallizing fluids. At the same time, system availability decreases.

MAGSON magnetic centrifugal pumps operate seal-less and with a magnetic coupling. The outer rotating drive magnet transmits the motor’s power contactlessly to the inner magnet, which drives the impeller.

A through-shaft is not required. This also eliminates the need for a shaft seal to the motor. The pump chamber and drive are hermetically sealed off from each other by a gap ring.

The benefits: no leakage through a shaft seal, reduced maintenance, and greater safety when handling critical fluids.

 

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Fast Service

The FLUX modular design simplifies production, spare parts management, and maintenance. Key components are identical across multiple assemblies. This shortens delivery times and reduces the effort required for inventory management.

Starting with assembly group 4, the entire drive can be removed thanks to its back-pullout design. The pump unit remains installed and hermetically sealed throughout the process.

  • Modular design for fast availability
  • Fewer spare parts in stock
  • Back-pullout design starting with Subassembly 4
  • Drive replacement without disassembling the pump unit

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Rugged Operation

Replaceable bearings, centering shafts, and shaft mounts protect key components under critical operating conditions. The plain bearing is housed in an additional plastic sleeve.

As a result, the housing and impeller-magnet assembly often remain undamaged even in cases of insufficient lubrication. The optimized fluid flow ensures safe and efficient operation.

  • Replaceable bearings and centering shafts
  • Additional plastic sleeve in the plain bearing
  • Protection in case of insufficient lubrication
  • Flow-optimized spiral housing starting with size 4

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Flexible Design

MAGSON PP/ETFE pumps can be integrated into various systems using threaded adapters or loose flanges. Starting with size 4, both connection options are available as standard.

IEC three-phase motors with PTC thermistors are designed for operation with a variable-frequency drive. This allows the operating point to be adjusted to changing process conditions.

  • Threaded adapters or loose flanges
  • Flexible integration into existing systems
  • IEC motors prepared for variable-frequency drive operation
  • PP or ETFE for parts in contact with the medium

Design of PP/ETFE Magnetic Centrifugal Pumps for Aggressive Media

MAGSON MA and MAS models are designed for aggressive, corrosive, and crystallizing media. The PP and ETFE materials allow for use with acids, alkalis, and chemically demanding liquids.

The seal-less design protects the process from leaks. At the same time, it reduces maintenance requirements since there is no dynamic shaft seal subject to wear.

The MAGSON MA model with normal suction is suitable for many stationary applications. The self-priming MAGSON MAS is used when the pump is installed above the liquid level.

This is particularly relevant for double-walled tanks, where toxic or environmentally hazardous media often need to be pumped from above.

Suitable for:

  • highly corrosive acids
  • alkalis
  • degreasing baths
  • chemically demanding liquids
  • crystallizing media
  • Toxic or environmentally hazardous media from double-walled tanks
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Design of Stainless Steel Magnetic Centrifugal Pumps for Pressure and Temperature

MAGSON MML is used when plastic reaches its technical limits. This applies primarily to applications involving higher pressures, higher temperatures, or special chemical requirements.

The metal version also operates seal-less and with a magnetic coupling. Here, too, the stator hermetically separates the pump chamber from the drive.

Stainless steel is available as standard. Other metallic materials, such as Hastelloy or titanium, are available for specific media and process conditions.

This allows the pump to be adapted to demanding applications without compromising the seal-less operating principle.

Suitable for:

  • corrosive media at higher temperatures
  • media at elevated pressures
  • Applications where plastic is not suitable
  • chemically demanding liquids
  • Special media with specific material requirements
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Self-priming, safe, powerful – MAGSON MAS

Environmentally harmful or corrosive fluids are often stored in double-walled tanks. Connecting a non-self-priming centrifugal pump at the bottom of the tank requires extensive safety measures due to the increased risk of leakage.

The MAGSON MAS offers a safe and economical alternative here. As a self-priming, magnetically coupled centrifugal pump, it can draw fluids from the bottom and pump them upward using the integrated suction chamber.

Thanks to its limited dry-running capability, it is also suitable for emptying tanks almost completely.

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Operating Principle of the MAGSON MAS

Special Advantages of the MAS

  • High self-priming performance: 5 mWC in less than 2 minutes
  • Flow rates up to 470 l/min and heads up to 27 mWC
  • No additional priming vessel required
  • Also suitable for residual liquid evacuation thanks to limited dry-run capability

1. Before Start-Up

The housing with integrated suction chamber consists of several chambers.

Before initial commissioning, the MAGSON MAS must be filled with liquid once.

2. Priming

The impeller and suction chambers are designed to evacuate air, enabling the safe pumping of a two-phase mixture of liquid and air.

A sufficient amount of liquid always remains in the lower housing chamber to lubricate and cool the impeller and bearings.

3. Pumping Operation

During pumping operation, the MAGSON MAS functions like the MA series as a sealless, magnetically coupled centrifugal pump.

Just as reliable, just as efficient.

4. Stop

When the pump is switched off, the medium flows back through the suction line toward the tank.

The special arrangement of the internal chambers ensures that sufficient liquid remains inside the pump housing and that the suction chamber does not run empty. This unique process operates without the need for valves.

Pump Technology and MAGSON Series in Detail

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PLASTIC VERSIONS (PP/ETFE/PVDF)
Assembly Flow Rate Delivery head Material Design / Special Features
MA BG 1 up to 70 l/min up to 6 mWs PP, ETFE Modular design, single-stage, horizontal
MA BG2 / BG3 up to 120 l/min up to 15 mWs PP, ETFE Modular design, single-stage, horizontal
MA BG4 up to 220 l/min up to 14 mWs PP, ETFE Back-pullout design
MA BG4H up to 160 l/min up to 16 mWs PP, ETFE Back-pullout design
MA BG5 up to 320 l/min up to 18 mWs PP, ETFE Back-pullout design
MA BG5H up to 200 l/min up to 24 mWs PP, ETFE Back-pullout design
MA BG6 up to 510 l/min up to 30 mWs PP, ETFE Back-pullout design
MA BG6H up to 230 l/min up to 29 mWs PP, ETFE Back-pullout design
MA BG7 up to 950 l/min up to 42 mWs PP, ETFE Back-pullout design

 

Note: Starting with Series 4, the pumps feature a back-pullout design as standard. This allows the motor and drive unit to be removed without taking the pump out of the pipeline. This reduces maintenance effort and downtime.

Performance range of the series

Rated value Range
Flow Rate 70 to 950 l/min
Head 6 to 42 mWs
Materials PP, ETFE
Designs Block design (BG1–BG3), back-pullout design (BG4 and above)
 

All plastic variants: Viscosity max. 150 mPas.

KUNSTSTOFF-Ausführungen, Spritzguß, selbstansaugend (PP/ETFE)
BAUGRUPPE FÖRDERMENGE FÖRDERHÖHE MATERIAL BAUART / BESONDERHEITEN
MAS BG4 bis 115 l/min bis 13 mWs PP, ETFE Magnetgekuppelt, selbstansaugend
MAS BG5 bis 230 l/min bis 17 mWs PP, ETFE Magnetgekuppelt, selbstansaugend
MAS BG6 bis 470 l/min bis 27 mWs PP, ETFE Magnetgekuppelt, selbstansaugend

Max. Ansaughöhe 5mWs bei Wasser und 20°C. Tatsächliche Ansaughöhe von den Gegebenheiten vor Ort abhängig. 

STAINLESS STEEL MODELS
Assembly Flow Rate Delivery head Material Design / Special Features
MML BG 1 up to 100 l/min up to 8 mWs Stainless steel Modular design, single-stage, horizontal
MML BG 2 up to 200 l/min up to 11 mWs Stainless steel Modular design, single-stage, horizontal
MML BG 3 up to 400 l/min up to 19 mWs Stainless steel Modular design, single-stage, horizontal
MML BG 4 up to 500 l/min up to 24 mWs Stainless steel Modular design, single-stage, horizontal

Max. viscosity 150 mPas. For media to which plastic is not resistant.

Performance Comparison
  • Highest-performance model: MA BG7 with up to 950 l/min and 42 mWs.
  • Highest stainless steel performance: MML BG4 with up to 500 l/min and 24 mWs.
  • Widest range of materials for chemical applications: MA series in PP and ETFE.
Feature MML MA
Material Stainless steel PP, ETFE
Max. flow rate 500 l/min 950 l/min
Max. head 24 mWs 42 mWs
Design Modular design Block design (BG1–BG3), back-pullout design (from BG4 onward)
Typical Applications Standard applications with stainless steel Corrosive media, acids, and alkalis

The maximum flow rate is a test bench value, measured with water at 20 °C at the pump’s discharge port, without accessories (hose, dispensing nozzle, flow meter). The flow rate that can be achieved in practice is lower and depends on the specific application, the properties of the fluid, and the pump configuration. Specifications are for an axial rotor, unless otherwise stated.

MAGSON Pumps Compared

An overview of the most important specifications and features—for selection and comparison.

Series / Model Flow Rate Head Material Design / Special Features
MML BG1 up to 100 l/min up to 8 mWs Stainless steel Modular design, single-stage, horizontal
MA BG1 up to 70 l/min up to 6 mWs PP, ETFE Modular design, single-stage, horizontal
MML BG2 up to 200 l/min up to 11 mWs Stainless steel Modular design, single-stage, horizontal
MA BG2 / BG3 up to 120 l/min up to 15 mWs PP, ETFE Modular design, single-stage, horizontal
MML BG3 up to 400 l/min up to 19 mWs Stainless steel Modular design, single-stage, horizontal
MA BG4 up to 220 l/min up to 14 mWs PP, ETFE Back-pullout design
MA BG4H up to 160 l/min up to 16 mWs PP, ETFE Back-pullout design
MML BG4 up to 500 l/min up to 24 mWs Stainless steel Block construction, single-stage, horizontal
MA BG5 up to 320 l/min up to 18 mWs PP, ETFE Back-pullout design
MA BG5H up to 200 l/min up to 24 mWs PP, ETFE Back-pullout design
MA BG6 up to 510 l/min up to 30 mWs PP, ETFE Back-pullout design
MA BG6H up to 230 l/min up to 29 mWs PP, ETFE Back-pullout design
MA BG7 up to 950 l/min up to 42 mWs PP, ETFE Back-pullout design

The maximum flow rate is a test bench value, measured with water at 20 °C at the pump’s discharge port, without accessories (hose, dispensing nozzle, flow meter). The flow rate that can be achieved in practice is lower and depends on the specific application, the properties of the fluid, and the pump configuration. Specifications are for an axial rotor, unless otherwise stated.

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Service & Support

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