The Design Three pass fire smoke tube system Functional Cylindrical For optimum Pressure resistance Special - purpose injector for effective and internal return temperature boost integrated into the boiler APEX Inspection ports viewing the water space Extremely low radiation losses Suitable for all heating system Extremely low back pressure Efficiency is maintained through out the range of load even at port load all the energy is converted in to heat Maintenance is kept to minimum Construction Three pass fire tube system Fully opening swivel - mounted boiler front door for easy cleaning inspection Insulated withe mineral wool mats underneath stainless-steel cladding Testing The metallic components are tested by ultra-sonic inspection while the welds are checked by means of radio graphics scanning and penetrants Available from 150 kg/hr to 5000 kg/hr