The STRAIGHT-TUBE class of water-tube boilers includes three types: 1. Sectional-header cross drum 2. Box-header cross drum 3. Box-header longitudinal drum In the SECTIONAL-HEADER CROSS…
A STATIONARY BOILER can be defined as one having a permanent foundation and not easily moved or relocated. A popular type of stationary fire-tube boiler…
Figure 1-1 is a portable Scotch marine tire-tube boiler. The portable unit can be moved easily and requires only a minimal amount of foundation work.…
The flame rectification sensor is commonly used in high efficiency furnaces that use direct burner ignition. Direct Burner Ignition System Flame Rectification Circuit — Direct…
Thermocouples are used on residential gas furnaces equipped with standing pilots. A standing pilot is one which burns continuously, whether the main burner is on…
1. Undo the screw retaining the spark electrode to the burner tray (Fig. 40). 2. Undo the screw retaining the burner to the burner tray…
Bent tube boilers usually have three drums. The drums are usually of the same diameter and positioned at different levels with each other. The uppermost…