Type 605 In-Line Gas Jet Blower Performance
and Dimensions
|
 |
|
SIZE
|
NOMINAL
SUCTION
|
DIMENSIONS,
INCHES
|
Weight
|
|
A
|
CFM
|
B
|
C
|
D
|
E
|
LBS.
|
|
3
|
55
|
33
|
3
|
30
|
3/4
|
45
|
|
4
|
100
|
42-1/2
|
3-1/2
|
39
|
1
|
65
|
|
5
|
165
|
52
|
3-3/4
|
48-1/4
|
1-1/4
|
90
|
|
6
|
250
|
61
|
4-1/4
|
56-3/4
|
1-1/2
|
115
|
|
8
|
460
|
79
|
4-1/2
|
74-1/2
|
2
|
170
|
|
10
|
770
|
96-1/2
|
5
|
91-1/2
|
2-1/2
|
225
|
|
12
|
1200
|
114
|
5-1/4
|
108-3/4
|
3
|
290
|
|
14
|
1700
|
132-1/2
|
5-3/4
|
126-3/4
|
4
|
350
|
|
16
|
2350
|
149-1/2
|
6
|
143-1/2
|
4
|
420
|
|
18
|
3100
|
167
|
6-1/2
|
161-1/2
|
5
|
500
|
|
|
|
|
|
| Connection E is a male pipe thread. |
|
Lengths B and D may vary with the application.
|
- Metal flanges are 1/2" thick and conform to ANSI 150
lb. drilling. Alloy units have 1/2" thick carbon steel
loose flanges with an 1/8" thick alloy facing.
- FRP flanges are to NBS Voluntary Product Standard PS 15-69,
Table 2.
- Weights are given for steel blowers. Fiberglass blowers
are approximately half the weight of steel blowers.
|
|
3" Gas
Jet Blower Performance (90
psig Steam Motive Pressure)
|
|
SUCTION
|
SUCTION
AIR FLOW(scfm)
|
|
DRAFT
("W.C.)
|
SMALL
NOZZLE
|
MEDIUM
NOZZLE
|
LARGE
NOZZLE
|
X-LARGE
NOZZLE
|
|
2
|
86
|
112
|
149
|
189
|
|
4
|
71
|
102
|
145
|
186
|
|
6
|
58
|
92
|
141
|
183
|
|
8
|
38
|
83
|
136
|
182
|
|
10
|
17
|
73
|
132
|
180
|
|
15
|
-
|
46
|
121
|
174
|
|
20
|
-
|
-
|
99
|
168
|
|
30
|
-
|
-
|
83
|
156
|
|
40
|
-
|
-
|
48
|
141
|
|
50
|
-
|
-
|
6
|
127
|
|
60
|
-
|
-
|
-
|
108
|
|
70
|
-
|
-
|
-
|
88
|
|
80
|
-
|
-
|
-
|
62
|
|
|
|
|
|
|
STEAM
FLOW (#/HR)
|
22
|
42
|
74
|
148
|
|
|
|
|
|
| |
| Gas Jet
Blower Capacity Ratios |
| Size |
3" |
4" |
5" |
6" |
8" |
10" |
12" |
14" |
16" |
18" |
| CR |
1 |
1.8 |
2.8 |
4 |
7.1 |
11.1 |
16 |
22 |
29 |
36 |
|
|
|
| |
| Sizing Example: |
| Problem: |
| A gas jet blower is needed to handle 420 scfm of
air at a 15" W.C. draft. |
| Solution: |
| From the performance table at a 15" W.C. draft
a 3" blower with medium, large, and extra large nozzles
will handle 46 scfm of air using 42 #/hr of steam, 121 scfm of
air using 74 #/hr of steam, or 174 scfm of air using 148 #/hr
of steam, respectively. |
| Medium Nozzle Unit: |
| First calculate a capacity ratio, CR. |
| CR = 420/46 = 9.13. |
| From the capacity ratio table a 10" unit is
required. Therefore, a 10" jet blower will handle 511 (46
x 11.1) scfm of air at a 15" W.C. draft using 466 (42 x
11.1) #/hr of 90 psig steam. |
| Large Nozzle Unit: |
| CR = 420/121 = 3.47. |
| A 6" unit will handle 484 (121 x 4) scfm of
air at a 15" W.C. draft using 296 (74 x 4) #/hr of 90 psig
steam. |
| Extra-large Nozzle Unit: |
| CR=420/174=2.41. |
| A 5" unit will handle 487 (174 x 2.8) scfm
of air at a 15" W.C. draft using 414 (148 x 2.8) #/hr of
90 psig steam. |
|
For this application the 6" large nozzle
blower requires less steam but is a larger, more expensive
unit than the 5" extra-large nozzle blower. Both initial
blower cost and operating cost should be considered when choosing
a unit.
It should be noted that friction losses must be considered
when sizing the adjoining piping system. Due to the relatively
low pressure boosts associated with a jet blower, pipe pressure
losses can represent a large percentage of the blower performance
requirement. It may be necessary to expand the adjoining
piping to a larger size to reduce losses.
|
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