UF Series "Flex-Tube" Steam Boilers
Dimensional Data
Components
Physical Data
Boiler
Model #
UFS-11-50
UFS-12-60
UFS-13-80
UFS-14-100
UFS-15-125
UFS-16-150
UFS-20-150
UFS-21-175
UFS-22-200
UFS-23-250
UFS-24-300
UFS-25-350
Nominal HP
50
60
80
100
125
150
150
175
200
250
300
350
Input (MBH)
2100
2520
3360
4200
5250
6300
6300
7350
8400
10500
12600
14700
Output (MBH)
1720
2070
2760
3440
4310
5170
5170
6030
6890
8610
10330
12050
Ship Weight (lbs)
4800
6300
6300
7300
3500
9700
9600
10800
12000
14400
16800
19200
Oper Weight (lbs)
5510
6100
7300
8730
10200
11680
11780
13230
14680
17520
20390
23220
Water Content at Oper Level (Gal)
86
96
120
172
205
239
263
293
323
376
432
484
A. Casing Length (in)
53
59
74
89
108
126
96
108
120
141
162
183
B. Overall Length* (in)
97
112
132
147
170
188
158
170
182
203
224
245
C. Casing Height (in)
82
82
82
86
86
86
104
104
104
104
104
104
D. Casing Width (in)
53
53
53
53
53
53
64
64
64
64
64
64
E. Flue Diameter (in)
10
12
12
14
16
16
16
18
18
20
20
24
F. Flue Location (in)
12
13
13
14
15
15
15
16
16
17
17
19
G. Steam Outlet 15PSIG (in)
4F**
4F
4F
6F
6F
6F
6F
8F
8F
8F
8F
8F
Steam Outlet 150PSIG NPT) (in)
2
2
2-1/2F**
3F
3F
3F
3F
4F
4F
4F
4F
4F
H. Blowdown Size-15PSIG (NPT) (in)
1-1/4
1-1/4
1-1/4
1-1/2
1-1/2
1-1/2
2
2
2
2
2
2
Blowdown Size-150PSIG (NPT) (in)
1-1/4
1-1/4
1-1/4
1-1/4
1-1/4
1-1/4
1-1/2
1-1/2
1-1/2
1-1/2
1-1/2
1-1/2
H. Feedwater Size (NPT) (in.)
1
1
1
1
1
1
1
1-1/4
1-1/4
1-1/4
1-1/4
Boiler Model #
PFS-30-350
UFS-31-400
UFS-32-450
UFS-33-500
UFS-34-600
UFS-40-500
UFS-41-600
UFS-42-700
UFS-43-800
UFS-51-900
UFS-52-1000
UFS-53-1200
Nominal HP
350
400
450
500
600
500
600
700
800
900
1000
1200
Input (MBH)
14700
16800
18900
21000
25200
21000
25200
29400
33600
37800
42000
50400
Output (MBH)
12050
13780
15500
17220
20660
17220
20660
24110
27550
31000
4440
41330
Ship Weight (lbs)
18200
20600
23000
25400
29200
26000
28600
31200
33800
36200
38800
44000
Oper Weight (lbs)
22020
24850
27690
30630
35210
33270
26810
40350
43910
48240
52010
58970
Water Content at Oper Level (†Gal)
400
512
565
618
724
876
989
1102
1218
1451
1591
1804
A. Casing Length (in)
153
171
189
207
243
177
201
225
249
233
253
293
B.
Overall Length* (in)
215
233
251
269
305
252
276
300
324
317
337
377
C.
Casing Height (in)
120
120
120
120
120
134
134
134
134
138
138
138
D.
Casing Width (in)
51
51
51
51
51
56
56
56
56
56
E.
Flue Diameter (in)
24
24
28
28
32
28
32
32
32
36
36
36
F.
Flue Location (in)
19
19
21
21
23
21
23
23
23
25
25
25
G. Steam Outlet 15PSIG (in)
10F**
10F
10F
12F
12F
12F
12F
12F
12F
14F
14F
14F
Steam Outlet 150PSIG NPT) (in)
6F**
6F
6F
6F
6F
6F
6F
6F
6F
8F
8F
8F
H. Blowdown Size-15PSIG (NPT) (in)
2
2
2
2
2
2
2
2
2
2
2
2
Blowdown Size-150PSIG (NPT) (in)
1-1/2
1-1/2
1-1/2
1-1/2
1-1/2
1-1/2
1-1/2
1-1/2
1-1/2
2
2
2
H. Feedwater Size (NPT) (in.)
1-1/2
1-1/2
1-1/2
1-1/2
1-1/2
1-1/2
1-1/2
1-1/2
1-1/2
2
2
2
†Consult
factory for larger sizes. *Overall length is
approximate and is dependent on length of actual burner
used. **Indicates Flanged Connection (150# RF).
#Suffix Model Number by desired max operating pressure and
burner designation (e.g., UFS-22-200-150-PF-L = 200 BPH/150
psi trim/Power Flame Burner/#2 Oil).
