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4B-SERIES BOILER MODEL

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Boiler Model/Size

4B-50

4B-60

4B-70

4B-80

4B-90

4B-100

4B-110

Gross Output Horsepower

H.P.

50

60

70

80

90

100

110

Steam Radiation

SQ. FT.

7,000 8,400 9,800 11,200 12,600 14,000 15,400
Steam Thermal

MBH

1,674 2,009 2,343 2,678 3,013 3,348 3,682
Steam per hr. 212 °F

LB/HR

1,725 2,070 2,415 2,760 3,105 3,450 3,795
Net Rating Steam Radiation

SQ. FT.

5,376 6,499 7,580 8,663 9,747 10,831 13,913
Steam Thermal

MBH

1,300 1,560 1,819 2,079 2,339 2,600 2,860
Firing Rate Oil

GPH

14.6 17.5 20.5 23.4 26.3 29.2 32.1
Gas

MBH

2,017 2,420 2,823 3,227 3,630 4,034 4,436
Heating Surface (Fireside)

SQ. FT.

200 250 300 350 400 450 500
Furnace Volume

CU. FT.

32.51 37.54 42.52 47.55 53.00 58.04 63.49

Boiler Model/Size

4B-50

4B-60

4B-70

4B-80

4B-90

4B-100

4B-110

A

Overall Length

FT.-IN.

7-5 1/2 8-5 3/8 9-5 1/4 10-5 3/8 11-6 1/4 12-6 1/4 13-7 1/4

B

Overall Width

IN.

64 64 64 64 64 64 64

C

Overall Height

IN.

74 74 74 74 74 74 74

D

Shell Length

FT.-IN.

5-0 1/2 6-0 3/8 7-0 1/4 8-0 3/8 9-1 1/4 10-1 1/4 11-2 1/4

E

Furnace Diameter

IN.

31 31 31 31 31 31 31

F

Furnace Length

IN.

52 5/8 64 1/2 76 3/8 88 3/8 101 3/8 113 3/8 126 3/8

G

Normal Water Line

IN.

64

64 64 64 64 64 64

H

Height (C.L. Furnace)

IN.

31 1/8

31 1/8 31 1/8 31 1/8 31 1/8 31 1/8 31 1/8

J

Depth (Reversing Chamber)

IN.

8

8

8

8

8

8

8

K

Depth (Smoke Hood)

IN.

21

21 21 21 21 21 21

L

Vent Outlet Diameter

IN.

12

14 14 14 16 16 16

M

Top (Front Rev. Chamber)

IN.

61 1/2

61 1/2

61 1/2

61 1/2

61 1/2

61 1/2

61 1/2

P

Bottom (Front Rev. Chamber)

IN.

30 7/8

30 7/8

30 7/8

30 7/8

30 7/8

30 7/8

30 7/8

Q

Top (Smoke Hood)

IN.

69 3/4

69 3/4

69 3/4

69 3/4

69 3/4

69 3/4

69 3/4

R

Bottom (Smoke Hood)

IN.

51 1/2

51 1/2

51 1/2

51 1/2

51 1/2

51 1/2

51 1/2

S

Saddle Width

IN.

7

7

7

7

7

7

7

T

Saddle Length

IN.

48

48 48 48 48 48 48

V

C.L. Front Saddle

IN.

12

12

12

12

12

12

12

W

C.L. Rear Saddle

IN.

35 47 59 71 84 96 109
  Steam Outlet Size

IN.

6

6

6

6

8

8

8

  Return Size

IN.

3

3

3

3

3

3

3

Boiler Model/Size

4B-50

4B-60

4B-70

4B-80

4B-90

4B-100

4B-110

  Dry Weight (Approx.)

LBS.

3,820 4,530 5,886 6,165 7,075 7,785 8,202
  Operating Weight (Approx.)

LBS.

7,185 8,634 10,742 11,765 13,499 14,961 16,202


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UL: 2106 NYSERDA Approved Heating Boilers Repairs National Board

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