we offer 4 ton capacity thermax make, model multipac smoke tube boiler ifb 40d/17.5/7, year of . Burners Spare Parts – Burner Sequence Controllers. Exporter of Burners Spare Parts – Burner Sequence Controllers, Siemens Flame Sensor, Oil & Gas Burner . Thermal Power Project in India. Client: Biomass Electricity Co. Ltd. (BECO), Thailand.