KSB RSY thermal oil pump High-temperature heat transfer oil circulation system

The RSY is an important member of the KSB Etanorm family, belonging to the horizontal, single-stage, end-suction centrifugal pump category. Its performance and dimensions conform to European standard EN 733. This series is specifically designed for the circulation of high-temperature heat transfer media (heat transfer oil) and hot water, and can withstand media temperatures up to 350°C, making it an ideal choice for high-flow-rate heat transfer systems.

The KSB RSY thermal oil pump is a professional industrial pump designed specifically for high-temperature heat transfer media.

 With a temperature resistance of 350°C, hydraulic efficiency exceeding 85%, a safe configuration with double-end mechanical 

seals, and convenient maintenance thanks to its back-pump design, the RSY series has become a reliable choice for industries 

such as chemical, petrochemical, printing and dyeing, and polyester fiber.

Whether building new heat transfer systems or upgrading existing equipment for energy conservation, the KSB RSY is a worthy 

first choice for high-temperature heat transfer media circulation pumps.

KSB RSY thermal oil pump High-temperature heat transfer oil circulation system

Product Overview: Etanorm-RSY Series

The RSY series is an important member of the KSB Etanorm family, a horizontal, single-stage, end-suction centrifugal pump.

 Its performance and dimensions conform to European EN 733 standard . This series is specifically designed for the circulation

 of high-temperature heat transfer media (heat transfer oil) and hot water, and can withstand media temperatures up to 350°C, 

making it an ideal choice for high-flow-rate heat transfer systems .

The RSY series is also an extension of the Etanorm hot oil pump family based on the ETNY series, developed to meet the needs

 of large flow rates and large systems, with a maximum inlet diameter of DN500.

KSB RSY thermal oil pump High-temperature heat transfer oil circulation system Core Technical Parameters

Parameter Item | Value/Range

Flow Rate Range | 3 ~ 2,285 m³/h |  

Head Range | 5 ~ 160 m |  

Maximum Working Pressure | 16 bar |  

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

Pump Casing Material | Ductile Iron (EN-GJS-400-15 / JS1025) |  

Impeller Material | Cast Iron (JL1020) |  

Pump Shaft Material | Chrome Steel (1.4021) |  

Sliding Bearing Material | Silicon Carbide |   

Sealing Configuration | Single-end/Double-end Mechanical Seal (compliant with EN 12756) |  

Motor Energy Efficiency Rating | IE4/IE5 (Optional PumpDrive Inverter System) |  

Explosion-proof Certification | Optional ATEX Explosion-proof Version

KSB RSY thermal oil pump High-temperature heat transfer oil circulation system Design Features and Technological Advantages

1. High-Temperature Adaptability Design

The core technological breakthrough of the RSY pump lies in its targeted design for high-temperature operating conditions:

Optimized Thermal Barrier Structure: Through a thickened pump cover design and limiting gasket configuration, heat transfer

 from the pump casing to the bearing cage is effectively reduced, protecting the bearing system for long-term stable operation 

at high temperatures  .

Silicon Carbide Sliding Bearings: Utilizing silicon carbide sliding bearings directly lubricated by the transported medium, these

 bearings possess excellent wear resistance and high-temperature resistance, avoiding the risk of "seizure" due to high-temperature 

expansion  .

Reinforced Bearing System: Equipped with reinforced deep groove ball bearings containing special grease, significantly extending

 maintenance intervals  .

2. Reliable Sealing System

Leakage of high-temperature heat transfer media is the greatest safety hazard. RSY pumps offer flexible sealing solutions:

Single-face mechanical seal: Suitable for normal operating conditions

Double-face mechanical seal (tandem arrangement): Suitable for harsh operating conditions, providing double safety assurance

Quench system: Optional seal quenching system further enhances sealing reliability 

All mechanical seals comply with EN 12756 standards, ensuring global interchangeability  

3. High-Efficiency Hydraulic Design

The RSY pump uses a closed radial impeller with twisted blades, and the hydraulic model has been optimized  :

Pump efficiency can reach over 85% 

Each pump can have its impeller cut to fit the customer's actual operating point, reducing unnecessary energy consumption.

Energy saving of over 15% compared to domestic hot oil pumps 

4. Convenient Maintenance Design

The RSY uses a back-pull-out design, a core advantage of the EN 733 standard :

Rotor components can be removed for maintenance without disassembling the pump casing and piping.

Replaceable pump body wear rings reduce maintenance costs.

Bearing brackets are easy to disassemble, simplifying maintenance operations 

5. High-Efficiency Ventilation and Exhaust

The RSY pump casing is designed with a highly efficient ventilation profile, ensuring rapid gas discharge during pump start-up

 and operation, avoiding cavitation and dry-running risks .

KSB RSY thermal oil pump High-temperature heat transfer oil circulation system Main Application Areas

RSY thermal oil pumps are widely used in the following industries and scenarios:

Application Area | Typical Scenarios

Heat Transfer Systems | Thermal oil systems conforming to DIN 4754 and VDI 3033 standards

Hot Water Circulation | Hot water systems conforming to DIN 4752 and TRD 108/110 standards

Chemical Industry | Heating/cooling jacket circulation in chemical reactors

Petrochemical Industry | Heat transfer medium in oil refining and polyester fiber production

Dyeing and Printing Industry | Hot oil circulation in setting machines and dyeing machines

Plastics/Rubber | Temperature control systems in calenders and extruders

KSB RSY thermal oil pump High-temperature heat transfer oil circulation system Product Selection Overview

The RSY series offers a variety of specifications and models, with typical examples including:

RSY 150-500

RSY 200-500

RSY 300-500

These specifications cover a wide range of flow rates from 3 to 1800 m³/h and head from 5 to 160 m, allowing for precise

 matching to actual operating parameters.

Selectable motor brands include ABB, Siemens, Teco, and Bede. KSB SuPremE magnet-free IE4/IE5 synchronous motors and 

PumpDrive variable frequency speed control systems are also available as options, enabling on-demand power supply and

 further energy savings.

KSB RSY thermal oil pump High-temperature heat transfer oil circulation system

Product Advantages Summary

Core Needs KSB RSY Solution Customer Value

High Temperature Reliability 350°C temperature resistance design + thermal barrier structure + silicon carbide bearings

 Ensures long-term stable operation under high temperature conditions, reducing downtime risk

Leakage Prevention and Safety Optional double-end mechanical seal + quenching system Zero leakage of heat medium,

 ensuring production safety and environmental compliance

Energy Saving and Cost Reduction 85%+ hydraulic efficiency + cutting at operating points + variable frequency drive Saves

 more than 15% energy compared to ordinary hot oil pumps, significantly reducing operating costs

Maintenance Ease Back-pull design + replaceable wear rings No need to disassemble pipelines for maintenance, shortening

 maintenance time and reducing costs

High Reliability Original German design and manufacturing + ATEX explosion-proof optional Meets the reliability requirements 

of harsh operating conditions