KSB Etabloc direct-coupled pump High-temperature heat transfer oil special type 

In the field of industrial pumping, there is often a conflict between installation space and performance 

requirements—users want a compact pump body that saves space, but also require powerful hydraulic performance and reliable operational stability. The KSB Etabloc series is a product designed to solve this contradiction.

KSB Etabloc is an industrial pump that achieves a perfect balance between compactness and high performance. 

Whether used for lagoon pool filtration in a luxury hotel in Monaco, server cooling in an SAP data center, or

 high-temperature transfer of heat transfer oil at 350°C in a chemical plant, Etabloc has earned the trust of users 

with its reliable performance and excellent energy efficiency.

Etabloc is a worthwhile consideration for users facing the following needs:

✓ Limited pump room space requiring compact equipment

✓ High energy efficiency requirements (e.g., green building, carbon neutrality targets)

✓ Media such as clean water, cooling water, pool water, etc.

✓ Need to handle heat transfer oil or high-temperature hot water (choose the SYT series)

As a single-stage volute direct-coupled pump conforming to EN 733 standards, Etabloc has become a reliable choice for water supply, cooling circulation, pool filtration, and heat transfer systems due to its compact integrated design, wide range of applications, and excellent energy efficiency.

KSB Etabloc direct-coupled pump High-temperature heat transfer oil special type  

Product Overview: The Perfect Balance of Compactness and Performance

Etabloc is an important member of the KSB Eta family, its most notable feature being its close-coupled design—the

 pump body and motor are directly connected, eliminating the traditional coupling and base, forming a highly compact

 pump-motor unit. This design gives Etabloc a unique advantage in space-constrained installations, especially suitable 

for projects with limited machine room space or requiring equipment integration.

The Etabloc series is further divided into several sub-series to meet the diverse needs of different operating conditions:

Sub-series | Main Features | Applicable Scenarios

Etabloc (Standard) | Basic direct-coupled design, compliant with EN 733 standards | Water supply, cooling circuits, pool filtration

Etabloc Pro | Equipped with high-efficiency IE4/IE5 motors and PumpDrive inverter system | Projects with high energy 

efficiency requirements

Etabloc MyFlow | Integrated Virtual Impeller Trimming technology | Operating conditions with frequent changes in operating points

Etabloc SYT | High-temperature design with thermal barrier structure | Thermal oil system, hot water circulation (up to 350°C)

KSB Etabloc direct-coupled pump High-temperature heat transfer oil special type   Core Technical Parameters

The Etabloc series covers a wide performance range, with parameters varying between different sub-series:

Etabloc / Etabloc Pro / Etabloc MyFlow (Standard/General Purpose)

Parameter Item | Value Range

Flow Rate Range | 1 ~ 740 m³/h

Head Range | 1 ~ 160 m

Maximum Operating Pressure | 16 bar

Medium Temperature Range | -30°C ~ +140°C

Pump Casing Material | Gray Cast Iron EN-GJL-250 / Ductile Iron EN-GJS-400-15 / Stainless Steel 1.4408

Sealing Configuration | Single-end mechanical seal (compliant with EN 12756)

Motor Energy Efficiency Rating | IE4 / IE5 (KSB SuPremE magnetless motor)

Variable Frequency Drive Optional | PumpDrive 2 / PumpDrive 3 integrated frequency converter

Explosion-proof Certification | ATEX explosion-proof version optional

KSB Etabloc direct-coupled pump High-temperature heat transfer oil special type   

Etabloc SYT (High-Temperature Heat Transfer Oil Dedicated Type)

Parameter Items Value Range

Flow Rate Range: 1 ~ 337 m³/h

Head Range: 1 ~ 99 m

Maximum Operating Pressure: 16 bar

Medium Temperature Range: -30°C ~ +350°C

Maximum Operating Temperature (Heat Transfer Oil): 350°C / 662°F

Maximum Operating Temperature (Hot Water): 180°C / 356°F

Pump Casing Material: Ductile Iron EN-GJS-400-15

Sliding Bearing Material: Graphite (Medium Lubrication)

Sealing Configuration: Single-end/Tandem Double-end Mechanical Seal + Quenching System

Core design features and technical advantages

1. Direct connection structure: maximize space utilization

The core design concept of Etabloc is the integration of pump and motor. Compared with traditional end-suction 

pumps, Etabloc eliminates the coupling, coupling guard and public base, and the pump body is directly installed on the motor flange.

Advantages reflected:

The floor space is reduced by more than 30%: especially suitable for projects with limited computer room space

Easy installation: no complicated shaft alignment required

Lighter weight: easier to transport and place on site

This is exactly what the KSB official website describes - "the solution when every centimeter of space counts."

2. Back-drawing design: no need to disassemble the pipeline for maintenance

Etabloc adopts a Back Pull-Out design that complies with EN 733 standards, which is a recognized standard for 

maintenance convenience in the industrial pump field:

The rotor components can be extracted for inspection without disassembling the pump casing and pipelines.

Replaceable pump body wear rings: reduce long-term maintenance costs

Replaceable sleeve pre-installed on shaft seal: simplifies seal replacement

For industrial users in continuous production, this design significantly reduces downtime.

3. High-efficiency hydraulic system: the core of energy saving and cost reduction

Etabloc is equipped with an optimized hydraulic model and uses a closed radial impeller with multi-radius curved 

blades to achieve high-efficiency fluid transportation.

Energy efficiency highlights:

The standard impeller is cut according to the operating point: when each pump leaves the factory, the impeller can

be cut according to the customer's actual operating point to avoid unnecessary energy consumption.

Optional IE4/IE5 SuPremE motor: the world's highest energy efficiency grade magnetless synchronous motor with 

significant energy saving effect

Virtual Impeller Trimming: The MyFlow version realizes "virtual impeller cutting" through frequency conversion control,

 optimizing the operating point without physically changing the impeller.

KSB official data shows that combining the SuPremE motor and the PumpDrive frequency conversion system can achieve 

energy savings of up to 70%.

4. Flexible material selection: adaptable to a variety of media

Etabloc offers a variety of pump body material options to adapt to different media characteristics:

Material Applicable Scenario

EN-GJL-250 (gray cast iron) non-corrosive media such as clean water and cooling water

EN-GJS-400-15 (ductile iron) high temperature and high pressure working conditions (such as SYT series)

1.4408 (stainless steel) corrosive media, chemical applications

CC480K-GS (tin bronze) seawater, special chemical media

5. Intelligent monitoring and control: digital empowerment

The Etabloc series can be integrated with KSB's intelligent monitoring and control system to further improve operational

 reliability and energy efficiency:

KSB Guard: A remote monitoring tool for pump operating status that can view pump operating parameters in real time, 

provide early warning of potential failures, and improve system availability.

PumpDrive frequency conversion system: Continuously adjusts the pump speed according to actual needs, so that the 

pump always runs at the optimal efficiency point, achieving energy supply on demand and maximizing energy saving.

6. Exclusive design of high-temperature SYT

Etabloc SYT is a specially developed version for thermal oil and high temperature hot water applications. It has the 

following unique design:

Thermal barrier structure: By thickening the pump cover design and optimizing the gasket configuration, the heat 

conduction from the pump shell to the motor side is effectively reduced, protecting the bearings and motor from

 long-term stable operation at high temperatures.

Graphite sliding bearings: Graphite sliding bearings directly lubricated by the transported medium have excellent high

 temperature resistance and self-lubricating properties to avoid failures caused by high temperature expansion.

Optional double-end mechanical seal: For hazardous media such as thermal oil, an optional tandem double-end 

mechanical seal is available with a quenching system to provide double safety protection.

Main Application Areas

The Etabloc series, with its diverse sub-series and material options, covers a wide range of industrial and civil applications:

Application Area | Recommended Model | Typical Scenarios

Water Supply Systems | Etabloc / Pro | Building pressurized water supply, secondary water supply, water treatment plants

Cooling Loops | Etabloc / Pro | Data center cooling, air conditioning system cooling towers, process cooling

Swimming Pool Filtration | Etabloc | Hotel swimming pools, water parks, residential swimming pool water circulation filtration

Heat Transfer Systems | Etabloc SYT | Chemical reactor heating/cooling, thermal oil boiler circulation

Hot Water Circulation | Etabloc SYT | District heating, hot water boiler circulation systems

Industrial Fluid Transport | Etabloc (Stainless Steel) | Chemical media, corrosive liquids