The GTS Series of hot water boilers is a unique three pass, horizontal fire tube, water-backed steam boiler design developed and perfected in Switzerland and now is a standard in the EU community. Available in both high pressure and low pressure steam, this particular shell design overcomes thermal shock problems common to other multi-pass boilers. Thermal stress is greatly reduced because of two unique features of the furnace. Firstly, the larger diameter, shorter furnace produces less thermal expansion than a furnace of an ordinary boiler. Secondly, the furnace end is supported by stays which are attached to the rear tube sheet. Tube sheet fatigue failures are eliminated because shear stress between the furnace and the rear tube sheet is greatly reduced.
Up to 83% efficiency
Three-pass design captures additional flue gas heat after heating primary surface
Dual fuels: natural gas, oil, biogas
Simplicity of Design
No complex controls which require intensive training
Fewer moving parts reduces incidence of failure and required retuning
Greatly reduced footprint, as compared to industry 3 and 4 pass boilers, given relatively large diameter and short furnace design