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Boilers, Steel
The Bigelow Company
Established 1860
Main Office and Works .
New Haven, Connecticut
New York Office--Graybar Building
Boston Office--101 Milk Street
Manufacturers of
Bigelow Hornsby Water Tube Boilers Bigelow Low Head Water Tube Boilers Bigelow Three Drum Vertical Water Tube Boilers Bigelow Horizontal Return Tubular Boilers
Bigelow Electric Steam Generators Bigelow Two Pass Boilers Bigelow Manning Boilers Bigelow Upright Boilers
The Bigelow Two Pass Boiler for
Heating and Power
The requirements in considering a boiler especially for steam heating--are first cost,
efficiency and maintenance, and the steel heating boiler particularly the Bigelow Two
Pass type we believe meets the above desired requirements most favorably.
First Cost--The F. O. B. price of a steel boiler is often higher than for other types,
but, of course, the installed cost is the correct way to figure. For the proper erection of a)
sectional boiler experienced and high priced men are required while the Bigelow Two-Pass<
Boiler is shipped practically all assembled and requires but a small amount of mason
work.
Efficiency--Correctly designed as a heat absorbing piece of apparatus, the area of
the gas passage in the first pass is approximately one third greater than that of the
return pass. This results in better heat transmission, due to the more uniform velocity
of the gases over the heating surface as they are cooled.
a
The furnace is constructed of standard fire and red brick and is encased in a heavy
sectional plate steel casing which adds to the neat appearance of the installation and
prevents infiltration of air through cracks that may develop in the brick work.
Maintenance--The Bigelow Two-Pass Boiler is constructed without crown sheet or
water legs, so there are no staybolts to break and cause leakage or danger of rupture.
Being constructed of steel, there is no likelihood of cracking sections due to sudden changes
of temperature, variation in thickness of material under pressure, and no unequal strains
are set up in assembling. The many installations of the Bigelow Two-Pass Boiler both
for heating and power, have proven it to be economical in operation and low in main
tenance cost.
Features of the Bigelow Two-Pass Boiler
No Staybolts Easy to Install Quick Steamer
Low Draft Loss Easy to Handle
Long Gas Travel Efficient to Operate
Low Maintenance Cost Ample Water Capacity
Occupies Small Floor Space Low Exit Gas Temperature
Ample Steam Storage Capacity
Inside of Boiler Readily Accessible Furnace Suitable for Oil Burning No Cast Iron in Contact with Pressure
Large Furnace Volume for Combustion Area of Gas Passes Properly Proportioned
No Special Brick Shapes Required for Furnace No Clearance Required at Rear for Tube Removal Constructed to A.S.M.E.,or Mass. State Requirements Fire Brick Furnace Walls, which Aids Combustion
Built in Units of 25. 50. 75, 100, 125 and 150 hp.
All Sizes Built as a Standard for 15 and 125 lb. W. P. Special Boilers can be Constructed for Higher Pressures
Brick Work Easily and Cheaply Repaired when Necessary Furnace readily adapted to Mechanical or Semi-Mechanical Stokers
Boiler Rating Based on 10 sq. ft. of Water Heating Surface per hp.
590
The Bigelow Company
Boilers, Steel
n
GENERAL INFORMATION OF. BIGELOW TWO-PASS BOILER
No. of Boikr lor Heating. 151b. W. P..... Power. 125 lb. W. P.....
240H .240
241H 241
242H 242
243H 243
244H 244
245H 245
Horse Power Based on 10 sq. ft. W. H. S.
TotalHeating Surface................................... sq.ft.
Capacity Steam Hand Fired Coal......... sq. ft.
Capacity Steam Oil Fired....................... sq.ft.
Capacity Water Hand Fired Coal......... q. ft.
Capacity Water Oil Fired.............................sq.ft.
Grate Area........................................................sq.ft.
Diameter stack, one boiler............................ in.
Diameter (tack, two boilers.................
Height stack................................................... feet
Area breeching, one boiler............................ (q.ft.
Area breeching, two boiler*..........................sq.ft.
Size of steam outlet, 15 lb. W. P................in.
Size of steam oozzle. 125 lb. W. P.........
Size of safety valve outlet, 15 lb. W. P... in.
Size of safety valve nozzle. 125 lb. W. P..in.
No. and size pop valves, 15 lb. W. P... .in.
No. and size pop valves. 125 lb. W. P.... in.
Blow down and return conn.. 15 lb. W. P... in.
Blow-off connection, 125 lb. W. P.................in.
No. red brick required...........................
No. fire brick required...........................
Area of shell to be insulated.................. sq. ft.
Weight bare boiler........................................ lbs.
Weight boiler complete cstgs^ trmgs. and
steel casing..............................................ibs.
Length over all............................................... ft.in.A
Width over all.............................;ft. in.
B
Length large shell............................................ ft.in.C
Steam outlet to floor, 15 lb. W. P..........ft. in. D
Steam nozzle to floor. 125 lb. W. P____ft. in. Di
Safety valve outlet to floor, 15 lb. W.P., ft. in. E
Safety valve noz. to floor, i 25 lb. WJ5.. ft. in. hi
Flue neck to floor...................................... ft. ii F
Water line to floor..................................... ft. ii G
Floor to shell at front of boiler.............. ft. ii H
Floor to shell at rear of boiler...................... ft.ii,,I
Diameter of small shell.................................. in. j
Diameter of large shell...................................in. K
Front of boiler to C safety valve nozzle, ft. in. L
Rear of boiler to C steam nozzle.............ft. in. M
Height of bridge wall...............................ft..in. N
Grate to floor................ ..........................ft. in. O
Length of furnace........................... . .ft. in.
P
Width of furnace...................................... ft.' in Size of flue neck.'........................... ...........in.
Q R
Thickness of side wall.............................. in.
S
Thickness of front waU.................. ...;.in.
T
Thickness of bridge wall at bottom.. .ft. in. U
Thickness of bridgewall at top.........in.
V
Floor to top of setting........... ............... ft. in. w
Depth and width of rear pier.................ft. in. X
Back of pier to rear of boiler................. ft. in. Y
Distance required to open rear cleanout
_ doors........................r...................... ft. in. Z
27 270 3750 4550 6000 7250 12.3 16 20 60 1.3 2.2 6 3 2 3 1-2' 1-2' 3 2 1400 550 100 4675
50 505 7000 8550
11200 13600 16.7
20 27 60 2.2
3.8 6 4 z/j 4
1-2%'
1-V
3 2
1650 675 120 8482
75 751 10500 12700
16800 20300 23.3
24
30 60 3.0 5.2 8 4
3 4 1-3' 2-2' 3 2 1750 775 ` 145 10732
100 1003 14000 17000 22400 27200 28.0 27 34 60 3.8 6.3
8 4. 4 4 1-4' 2-2%' 4 2 2100 800 170 14000
127 1273 17500 21500 28000 34400 31.0 30 38 60 4.5 8.0
8 6 4 4 1-4' 2-2%' 4 2 2300 900 195 16717
150 1501 21000 25500 33600 40800 36.1
.. 30 42 60 5.2 9.4 8 6 4
2-3' 1-4' 2-3'
4 2,/> 3000 1050 220 18823
7993
H'9' 5'4' 5' 8'
rm' rw
7'4fc' 7' 6%' 7'9%' 6'5%' 4 7'
2? 10*
32' 54'
3'4'
4'2' 3' 3'
2' 1' 4'O'
3' 1' 8'x22'
12492
15607
19841
23133
25859
13'O'
14' 1'
16' 2'
16' 4'
18' 10'
6'5'
6'II'
6' II'
7'5'
7'5'
6' 2'
6'8'
7'8'
7'8'
8'8'
8' 1%'
8' hf/' 9'2%' 9'I1J4' 9' 1114'
8' 4J6' 7'10%'
9- |i/j' 8'71/,'
9'5"4' 10* iy4' 8'11%' 9'756'
10' 13/*'
9' TA"
8' 1%' 8'3%'
6' 1156'
8' 10%' 9" 0%'
7' 8%'
vw 9' v/i" r m%'
9* 10%' - 9' 10*
10' 0%' 8-6%'
W
4' 7'
5'O'
5'O'
5' 4*
5' 4'
2' 4'
2'7'
2' 5'
2*7'
2' 7'
38' 42' 46' 50* 50*
66' 72' 78' 84' 84'
4'7'
5' 3'
6' 3'
6' 5'
6' 0'-8' 0*
4' 2' 3'O'
r i'
. 4' 7' 3' 1' 2' 1'
. 5'8' 2' 11' 2' 1'
5' 8T
r II'
2' 1'
6'7' 2'II' 2' 1'
4' 6'
5'O'
6'O'
6'O'
7'O'
4'2'
4' 8'
4'8'
5'2'
5' 2'
ll'24' l2/,'*32' 13/2'*36' 15,A'x40' 1 5%'x42' 'w M
l'4' 6/,' 6'5' I'O'rf'O'
y i>/2'
Y 4' 6Vi"
6'8'
1'0**3'O' 3'7!/2'
P 4' w 7' 3'
1'0**3'6'
4' IW
I'4' 6A' . 7'5' I'4'x4'0' 4'9%'
1' 4'
%
!'6'*4'6' 4'7%'
1' 6'
8' 7' 11' 1'6'x4' 6' 5' 7'
no'
2' r
2' 4'
2' 6'
2'10'
2' 10'
591