16
Figure : Purpose of Tappings and Bosses
TABLE 3: PURPOSE OF TAPPINGS & BOSSES
Tapping
Location
Size, NPT
Boss Location
Thread Size
UNC
Steam Boiler
Less Heater
With Heater
A
¼" - 18
Pressure Gauge
B
¼" - 18
Pressure Limit
C
¾" - 14
Probe LWCO - Std.
Plugged (Float LWCO)
D
½" - 14
Water Gauge Glass (Probe LWCO)
Water Gauge Glass, Pressuretrol &
LWCO (Float LWCO)
E
" - 11½"
Supply (Front & Rear Tappings)
F
¾" - 14
Safety Valve
G
1½" - 11½
Condensate Return
H
1¼" - 11½
Optional Front Return
J
1½" - 11½
Surface Blowoff (Plugged)
K
1" - 11½
Indirect Water Heater Supply
L
½" - 14
Indirect Water Heater Limit
M (4 pcs)
5/16" - 18
Jacket Front Panel, Burner Swing
Door Mounting Bracket
N ( pcs)
3/8" - 16
Burner Swing Door
P (10 pcs)
5/16" - 18
Jacket Rear Panel, Smoke Box Collar,
Cleanout Covers
Q
¼" - 18
Smokebox Pressure Tapping
R
½"-14
L4006
Operating
Control
Plugged
Summary of Contents for MST288
Page 11: ...11 Figure 4 Boiler Removal from Skid ...
Page 19: ...19 Figure 9 Float Type LWCO and Pressure Limit Installation ...
Page 25: ...25 Figure 12 Recommended Boiler Piping for Gravity Return Steam Boiler ...
Page 34: ...34 Figure 18 Wiring Diagram Steam Hydrolevel CG450 Probe LWCO ...
Page 35: ...35 Figure 18A Wiring Diagram Riello 40 Series Burner Steam Hydrolevel CG450 Probe LWCO ...
Page 36: ...36 Figure 19 Wiring Diagram Steam McDonnell Miller PS 801 Probe LWCO ...
Page 37: ...37 Figure 19A Wiring Diagram Riello 40 Series Burner Steam McDonnell Miller PS 801 Probe LWCO ...
Page 38: ...38 Figure 20 Wiring Diagram Steam McDonnell Miller 67 Float LWCO ...
Page 39: ...39 Figure 20A Wiring Diagram Riello 40 Series Burner Steam McDonnell Miller 67 Float LWCO ...
Page 45: ...45 Figure 24 L1 and V1 Head Electrode Positioning and Gun Setting Beckett AFG ...
Page 58: ...58 Bare Boiler Assembly ...
Page 60: ...60 Jacket Assembly ...
Page 62: ...62 MST288 Thru MST629 Steam Boilers Trim and Controls ...
Page 64: ...64 Beckett AFG Burner ...