Thermal oil


Thermal oil is a highly suitable – and safe – alternative to steam in many processes, particularly where the dangers of high pressure are to be avoided. The Grundfos range of feeding pumps for thermal oil applications handles temperatures up to 240°C.



Energy consumption is important to your customer.



Grundfos high-efficiency E-solutions significantly reduce energy consumption by automatically adjusting pump performance to the actual need. Naturally, the E-solutions meet international efficiency standards.


Stock management can be difficult due to the global differences in voltages and frequencies.


Grundfos E-solutions feature dual frequency and a wide voltage range, allowing you to use the same solution all over the world. Naturally, the E-solutions carry the necessary approvals.


The very high temperature of hot liquids can be damaging to the pump and even destroy the shaft seal.


Grundfos offers specially designed shaft seals that handle liquid temperatures up to 240°C, including thermal oil without external cooling.


When temperature control is part of the process, the pump material is potentially stressed because of the continuous thermal expansion and contraction.

By applying a Grundfos speed-controlled pump the temperature is held constant.



Depending on the type of oil used in the application, different rubber materials are available:

  • FKM: Viton
  • FXM: Fluoraz
  • FFKM: Kalrez

Grundfos for Engineers


Grundfos for Engineers is your knowledge hub with advice, expert insights and engineering tools to ease your day.

Grundfos for Engineers can support you when specifying pumps, enhancing your expertise with industry knowledge, insights on system design, cases, films, tools and more. 

Grundfos for Engineers

Feed your system with Grundfos know-how

Feed your system with Grundfos know-how

Grundfos offers a wide range of feed pump solutions for steam boiler applications in virtually any type of industrial process. Which to choose depends on your specific requirements in terms of steam quality, operational stability and life cycle cost.

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1.1 MB/8 pages - Date: 09/14


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Boilers and systems

Boilers and systems

Grundfos pumps are reliable, efficient and cover a wide performance range. As an experienced consultant in the implementation of boiler systems, we engage in the process of close partnership and dialogue to find the best solution for your system.

Get your copy of the Boilers & Systems Engineering Manual here