1 Factory,36 years boiler experience,skilled 2 steam capacity 0.5t/h to 35t/h 3 7bar to 25bar 4 boiler has 30 years life time 1,This product design for the wet back three return fire tube , flame burning with micro positive pressure in the large combustion chamber , fully burning, low heat load of the furnace, few emissions of the deleterious substance SOX, NOX 2,Wave stove and thread smoke tube ...