... .Satisfied after-sale service 3.One year warranty DZL series coal fired steam/hot water boilerDZL Steam (hot water) boiler composed ... chain grate,Draught fan,Blast blower,Slag extractor,Dirt catcher,Coal conveyor,Soften water,Small pump,economizer,Electrical Cabinets and so ... pressure (Mpa)nominal steam (°C)nominal feed water (°C)Heating area(m2)active area of the grate (m2)suitable coalexhaust ...