Boiler operation Boiler working procedure: The boiler is supplied with water by a feed pump. Water enters the boiler through a feed check valve. When the water reaches normal water level which is approximately the middle of the water gauge glasses, the feed pump is stopped by the dual control. The burner is bolted to the hinged front door. Air required for combustion is provided by a forced draught fan which is integral with the burner unit. The furnace receives heat radiant from the flame and the hot gases from the flame give up heat to tubes in the second pass as they travel to the front chamber. Gases turn into front chamber and give up more heat to the tubes in the third pass as they travel to the rear chamber. The gases leave the boiler by the chimney at the top of the rear chamber. As the steam pressure rises the pressure has been shown in pressure gauge. When the pressure is sufficiently high the main stop valve can be opened to allow steam to pa
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