May 17, 2019 · Straight Tube Boilers. 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 DRUM boiler with vertical headers, the headers are steel boxes into which the tubes are rolled. Feedwater enters and passes down through
Boiler Pressure Problem - Hello, where I live, it's mostly gas furnaces with air conditioners or heat pumps.My boiler just started causing problems with high pressure. I work in HVAC as a technician but do not have a lot of experience with hot water or steam boilers.