Heat transfer fluids and thermal oils for industrial plants
Bolztherm GmbH, based in Gronau (North Rhine-Westphalia, Germany), specialises in the development and manufacturer-independent distribution of heat transfer fluids. We supply thermal oils for operating temperatures from -160 °C to 450 °C, offer technically compatible alternatives to well-known brand-name products and test used thermal oils in our own laboratory in accordance with DIN 51529.
Contact us Our productsBolztherm at a glance
- Location: Opelstraße 12, 48599 Gronau, North Rhine-Westphalia, Germany – part of the Uhlenbrock Group.
- Product range: mineral oil-based, synthetic, silicone oil-based and glycol-based heat transfer fluids as well as food-grade heat transfer fluids for the food and pharmaceutical industries.
- Temperature range: from low-temperature applications starting at -160 °C up to high-temperature applications of 450 °C.
- Manufacturer-independent: compatible alternatives to e.g. Marlotherm®, Therminol®, Diphyl®, Dowtherm®, Mobiltherm® and Shell Thermia – see our comparison tables.
- Analysis service: testing of used thermal oils in accordance with DIN 51529 in our own laboratory, results usually within about two working days – learn more about thermal oil analysis.
- Consulting: technical advice by phone and on site, specialist seminars and training on thermal oil.
Our product areas
High-temperature heat transfer fluids
For flow temperatures up to 450 °C, e.g. BOLZTHERM SWH-450, SWH-400 and AW-75.
Mineral thermal oils
Proven heat transfer oils for non-pressurised systems, e.g. CW-32 (successor to Aral Farolin U), CW-100 and CW-EVO.
Low-temperature heat transfer fluids
Pumpable down to -160 °C, e.g. CT-7, CT-12 and the silicone oil-based ST products.
Food grade
Heat transfer fluids for applications with possible incidental food contact, e.g. BOLZTHERM Food Grade 700.
Special products
Working fluid for ORC plants (ORC), system cleaner (System Cleaner 20) and glycol-based cooling/heat transfer fluid (WE).
Tailor-made solutions for heat transfer systems
We offer every type of heat transfer fluid and are completely independent of manufacturers. The best solution for your plant – sustainable and efficient. That is our service.