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4A-SERIES BOILER MODEL

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Boiler Model/Size

4A-25

4A-35

4A-45

4A-55

4A-65

4A-75

Gross Output Horsepower

H.P.

25

35

45

55

65

75

Steam Radiation

SQ. FT.

3,500

4,900

6,300

7,700

9,100

10,500

Steam Thermal

MBH

837

1,171

1,506

1,841

2,176

2,511

Steam per hr. 212 °F

LB/HR

863

1,208

1,553

1,898

2,243

2,588

Net Rating Steam Radiation

SQ. FT.

2,615

3,673

4,794

5,938

7,040

8,122

Steam Thermal

MBH

650

910

1,170

1,430

1,690

1,949

Firing Rate Oil

GPH

7.3

10.2

13.1

16.1

19.0

21.9

Gas

MBH

1,008

1,411

1,814

2,218

2,622

3,025

Heating Surface (Fireside)

SQ. FT.

100

150

200

250

300

350

Furnace Volume

CU. FT.

15.81

20.72

26.64

32.01

37.44

42.87

Boiler Model/Size

4A-25

4A-35

4A-45

4A-55

4A-65

4A-75

A

Overall Length

FT.-IN.

6-0 3/8

7-7 1/8

9-5 3/8

11-2 1/4

12-11

14-7 1/2

B

Overall Width

IN.

53

53

53

53

53

53

C

Overall Height

IN.

63

63

63

63

63

63

D

Shell Length

FT.-IN.

3-11 3/8

5-6 1/8

7-4 3/8

9-1 1/4

10-10

12-6 1/2

E

Furnace Diameter

IN.

24 1/2

24 1/2

24 1/2

24 1/2

24 1/2

24 1/2

F

Furnace Length

IN.

39 1/2

58 1/4

80 7/8

101 3/8

122 1/8

142 7/8

G

Normal Water Line

IN.

53

53

53

53

53

53

H

Height (C.L. of Furnace)

IN.

27 5/8

27 5/8

27 5/8

27 5/8

27 5/8

27 5/8

J

Depth (Reversing Chamber)

IN.

8

8

8

8

8

8

K

Depth (Smoke Hood)

IN.

17

17

17

17

17

17

L

Vent Outlet Diameter

IN.

10

10

12

12

14

14

M

Top (Front Rev. Chamber)

IN.

49 7/8

49 7/8

49 7/8

49 7/8

49 7/8

49 7/8

P

Bottom (Front Rev. Chamber)

IN.

25 3/4

25 3/4

25 3/4

25 3/4

25 3/4

25 3/4

Q

Top (Smoke Hood)

IN.

59 1/2

59 1/2

59 1/2

59 1/2

59 1/2

59 1/2

R

Bottom (Smoke Hood)

IN.

42 5/8

42 5/8

42 5/8

42 5/8

42 5/8

42 5/8

S

Saddle Width

IN.

7

7

7

7

7

7

T

Saddle Length

IN.

36

36

36

36

36

36

V

C.L. Front Saddle

IN.

12

12

12

12

12

12

W

C.L. Rear Saddle

IN.

22

41

63

84

105

125

  Steam Outlet Size

IN.

6

6

6

6

6

6

  Return Size

IN.

3

3

3

3

3

3

Boiler Model/Size

4A-25

4A-35

4A-45

4A-55

4A-65

4A-75

  Dry Weight (Approx.)

LBS.

3,164

3,350

4,821

5,490

6,162

6,819

  Operating Weight (Approx.)

LBS.

4,764

5,670

8,021

9,490

10,962

12,419


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