Scotch Marine Steam Boilers

Scotch Marine is a two-pass fire tube design with completely submerged tubes for optimal efficiency & longer boiler life. Over 6sq feet of heating surface guarantees high boiler performance efficiency.
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Boiler pressures do not fluctuate because the upper third of the boiler is the steam chamber compared to other boiler designs with smaller steam chambers.

The McKenna (pre-certified) Low Nox forced draft burner will produce combustion efficiencies in excess of 82%, which results in reduced fuel cost.

Heavy-duty fiberglass insulation board is covered with a heavy galvanized sheet metal jacket to effectively reduce heat losses.

Quiet boiler combustion performance is achieved throughout all firing ranges.

Turbolators come standard in all 2″ fire tubes to provide lower stack temperatures (as low as 385 degrees) therby transferring more heat to the water.

Unlike other boiler designs, maintenance of the Scotch Marine boiler is faciliated by the uncomplicated design and ease of access to both boiler and burner.

With reasonable boiler care, tubes are not often in need of replacement.  When replacement is required, our boiler with 2″ O.D. straight tubes may be easily retubed by most boiler specialist.

End plates are easy to remove for tube accessibility and boiler inspection. (Hinged doors are found on larger models).

HORSEPOWER

 

5

10

15

20

25

30

40

50

Pounds of Steam per Hour

175

350

520

700

870

1050

1250

1750

Heating Surface square feet

26

65

98

120

157

184

217

328

Firing Rates:

     Gas 1000 BTU

C.F.H.

220

425

635

850

1060

1280

1500

2000

     LP 91,500 BTU

G.P.H.

2.3

4.7

6.8

9.1

11.4

13.7

16.1

17.9

     No. 2 Oil 140,000 BTU

G.P.H.

1.5

3

4.5

6

7

9

10

14

DATA:

Boiler Shell Diameter O.D.

 

24

30

34

34

36

38

42

54

Overall Length

A

63

81

81

91

91

95

115

128

Overall Width

B

36

42

48

48

52

54

58

72

Overall Height

C

52

58

60

60

64

66

66

88

Length of Boiler Shell

D

45

60

60

72

72

78

90

96

Boiler Width

E

28

34

38

38

40

42

47

60

Base to Top of Boiler

F

37

43

48

48

50

52

57

72

Back Plate to Safety Valve

G

8

10

10

10

10

10

20

25

Safety Valve to Low Water Control

H

6

8

8

8

8

8

10

8

Front Plate to Low Water Control

I

8

10

10

10

10

10

10

25

Gas Burner Length

J

18

18

18

18

18

18

30

30

Oil Burner Length

J

18

18

18

18

18

18

24

24

Floor to Center of Furnace

K

18

20

21

21

23

24

24

32

Stack Diameter Required

 

10

10

10

10

10

10

12

14

Furnace Size O.D.

 

8 3/4

12 3/4

12 3/4

12 3/4

14

14

16

20

Tube Size

 

2x 35 1/2

2x 47 3/4

2x 47 3/4

2x 58 3/4

2x 58 3/4

2x 58 3/4

2x 70 1/2

2x 67 1/2

Number of Tubes

 

16

24

39

39

46

56

60

100

Steam Outlet

 

 3/4

1

1

2

2

2

2

3

Hand Holes - Number and Size

(2) 3X4

(3) 4X6

(3) 4X6

(3) 4X6

(3) 4X6

(3) 4X6

(5) 4X6

(5) 4X6       (1) 12X16

Blow Down Size

 

1

1

1

1

1

1

1 1/2

1 1/2

Feed Water Size

 

1

1

1

1

1

1

1

1

Gas Line Inlet

 

1

1

1

1

1 1/4

1 1/4

1 1/2

2

Lowest Safe Water Line from Floor

27

33

35

35

37

37

41

55

Weight

 

1150

1850

2150

2600

3100

3500

4300

5400

Cu. Ft. Crated

 

75

125

150

160

200

220

300

520