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Utilitiesman Basic Volume 02 - Manual for electric, plumbing, water and other utilities | Next
Horizontal Return Tubular Boiler |
boiler shell for inspection, cleaning, and repairs. On such
occasions, always ensure that all valves are secured,
locked, tagged, and that the person in charge knows you
are going to enter the boiler. Additionally, always have a
person located outside of the boiler standing by to aid you
in case of an incident occurring that would require you to
need assistance.
The handholds are openings large
enough to permit hand entry for cleaning, inspection, and
repairs to tubes and headers.
Figure 1-2 shows a
horizontal fire-tube boiler used in low-pressure
applications. Personnel in the Utilitiesman rating are
assigned to operate and maintain this type of boiler more
often than any other type of boiler.
Vertical-Tube Boiler
In some fire-tube boilers, the tubes run vertically, as
opposed to the horizontal arrangement in the Scotch
boiler. The VERTICAL-TUBE boiler sits in an upright
position, as shown in figure 1-3. Therefore, the products
of combustion (gases) make a single pass, traveling
straight up through the tubes and out the stack. The
vertical fire-tube boiler is similar to the horizontal
fire-tube boiler in that it is a portable, self-contained unit
requiring a minimum of floor space. Handholds are also
provided for cleaning and repairing. Though
self-supporting in its setting (no brickwork or foundation
being necessary), it MUST be level. The vertical
1. VENTS
7. WATER LEVEL GAUGE
2. AIR DAMPER
8. BURNER SWlTCH
3. HIGH-LIMIT PRESSURE CONTROL
9. PRIMING TEE
4. STEAM PRESSURE GAUGE
10. OIL UNIT, TWO STAGE
5. GAUGE GLASS SHUTOFF COCK
11. SOLENOID OIL VALVE (Maintenance)
6. LOW-WATER CONTROL
12. SERVICE CONNECTION BOX
13. FUEL OIL SUPPLY CONNECTION
14. FUEL OIL PRESSURE GAUGE
15. IGNITION CABLE
16 IGNITION CABLE
17. NAMEPLATE
18. BLOWER MOTOR
UTB2f0102
Figure 1-2.—Horizontal fire-tube boiler used in low-pressure applications.
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