Kroll & Ziller At a glance Project: Modernization of an outdated steam system Industry: Manufacturing of technical seals and flange connections Location: Germany AURA Solution AURA System: Electric thermal oil system Heating type: Electric Heat transfer medium: Thermal oil Maximum temperature: 300°C Power: 100kW The electric thermal oil system ensures a significantly more stable production process, reduced energy costs, and zero direct CO₂ emissions. Initial situation For over 80 years, Kroll & Ziller GmbH & Co. KG has been manufacturing high-quality sealing solutions – including for the food industry, chemical sector, mining, and drinking water supply. Industrial process heat is essential here to shape materials, cure them, and ensure long-term functionality. Until now, the presses used in the vulcanization process at Kroll & Ziller were operated with a fuel-fired steam system – a setup associated with high energy consumption, intensive maintenance, and significant operating costs. The objective: A modern, efficient system to reduce the carbon footprint. AURA solution In this project, we implemented two key technology shifts: 1.Transition from fuel-fired to electric heating: The new electrically heated system now operates emission-free, safely, and with minimal maintenance. Thanks to precise temperature control, Kroll & Ziller benefits from increased process stability and improved energy efficiency. 2.Conversion from steam to thermal oil as the heat transfer medium: Thermal oil can be operated at high temperatures with virtually no pressure, reducing requirements for pressure vessels, piping systems, and safety valves.
