26 Part Number 550-110-772/0816
OSB
Series 2 Oil-Fired Steam Boilers – Boiler Manual
12 Dimensions
Boiler
model
number
Supply
tapping
(inches NPT)
Return
tapping
(inches NPT)
“A”
Supply riser spacing
(inches)
“B”
Combustion chamber
depth (inches)
“D”
Jacket depth
(inches)
OSB-3 2-1/2 2 --- 13-1/2 16-7/8
OSB-4 2-1/2 2 --- 16-5/8 20
OSB-5 2-1/2 2 --- 19-7/8 23-1/8
OSB-6 (2 X) 2-1/2 2 19 23-1/2 26-1/4
Figure 18 Dimensional drawing — ALL DIMENSIONS IN INCHES
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