Calorifier Sets



Electric Calorifier Sets
Thermal Fluid Heating Systems
Hot Oil & HTF Heating Processes

Operational Parameters

HTF heating and hot oil systems can be worked either side of atmospheric pressure, although pressurised installations allowing operation above their normal saturation temperatures are more complex than for steam - partly through need to inhibit oxidation of the working medium. Even so, a synthetic HTF or thermal oil heater can run at 300 deg.C under normal pressure, whilst saturation pressure for dry steam at that temperature is around 85 barg. No thermodynamic pressure is induced where the fluid vapour pressure remains below atmospheric, and engineering costs are much-reduced if systems are to operate only under gravity head. Generally speaking, electric calorifiers for thermal fluid heating fall within SEP classification of the PED and are not CE marked.

Thermal Fluid Heaters

Dove Thermal Engineering has built fired- and unfired plant & equipment for Therminol and Dowtherm thermal fluid and Shell Thermia hot oil systems. We have successfully worked Solutia T66 at temperatures to 340 deg.C under atmospheric pressure - as for our Klieverik thermo-bonding calendering machine installation (see Gallery page). The isometric shows a modularized pair of electric calorifiers.

Pipework Design

Although carbon steel is to be preferred for high temperature operations, we have designed, stressed, built and commissioned pressurised systems in other materials by request. Thermally-induced movement in carbon steel is lower, and properties retention much superior. Our method for pre-tensioning pipe support systems enables quick and accurate installation.

Typical Capacity and Workscope:

Liquid Phase Heating Plant for International Automotive Components
Electric thermal oil heater installation for Sigma Technologies
Pressurized HTF Plant Rectification for Midland Oil Refinery
Multiple HPHW and LPHW Heating Installations and Systems
Thermal Fluid Heating Plant for Tiflex Limited
HTF heating plant & equipment for Flint Ink