Type 664 and 666 Liquid Jet Exhauster Performance
|
| Problem: |
| A liquid jet exhauster is required to handle 5.5
scfm of air at 10" HgA pressure and discharge against 10
psig pressure using 100 psig pressure water at 80'F". What
size exhauster is needed and what are the actual operating air
and water flow rates? |
| Solution: |
|
A 1" Type 664 Exhauster handles 0.63 scfm
of air under these conditions. Calculate a capacity ratio,
CR, as follows: CR=5.5scIm/0.63scfm=8.8.
Use the next highest capacity ratio of 9 for a 3" unit.
The motive flow rate for the 3" exhauster will be 9
x 18.1 = 162.9 gpm at 100 psig pressure.
|
| A 3" exhauster will handle 5.7 scfm of air
at 10" HgA pressure using 163 gpm of 80°F water at 100
psig pressure. |
| For water temperatures higher or lower than 80°F,
refer to the correction procedure outlined under Type 684/686
Exhausters on page 9 of this bulletin. |
| ** Care should be taken when designing discharge
piping and calculating discharge pressure requirements for 2
phase flow. |
| LIQUID JET EXHAUSTER
CAPACITY RATIOS |
| SIZE |
1/2" |
3/4" |
1" |
1-1/2" |
2" |
2-1/2" |
3" |
4" |
5" |
6" |
8" |
| CR |
.25 |
.56 |
1 |
2.25 |
4 |
6.25 |
9 |
16 |
25 |
36 |
64 |
|
|
 EXHAUSTER PERFORMANCE
| 1" EST TYPE
664 LIQUID JET |
| SUCTION |
DISCHARGE |
SUCTION AIR RATE
RATE (SCFM) |
| PRESSURE |
PRESSURE |
MOTIVE PRESSURE
(PSIG) |
| (Inches HgA) |
(PSIG) |
40 |
60 |
80 |
100 |
| |
0 |
.15 |
.19 |
.34 |
.39 |
|
5 |
.15 |
.15 |
.24 |
.29 |
5 |
10 |
- |
.15 |
.24 |
.29 |
|
15 |
- |
- |
.19 |
.29 |
|
20 |
- |
- |
1.0 |
.29 |
|
0 |
.29 |
.44 |
.63 |
.96 |
|
5 |
.24 |
.39 |
.58 |
.68 |
10 |
10 |
- |
.34 |
.48 |
.63 |
|
15 |
- |
- |
.43 |
.58 |
|
20 |
- |
- |
.34 |
.53 |
|
0 |
.53 |
.87 |
1.2 |
1.8 |
|
5 |
.39 |
.68 |
.92 |
1.2 |
15 |
10 |
- |
.53 |
.77 |
1.1 |
|
15 |
- |
- |
.68 |
.92 |
|
20 |
- |
- |
.53 |
.77 |
|
0 |
.92 |
1.6 |
2.4 |
3.0 |
|
5 |
.58 |
1.0 |
1.4 |
1.9 |
20 |
10 |
- |
.77 |
1.1 |
1.5 |
|
15 |
- |
- |
.92 |
1.3 |
|
20 |
- |
- |
.77 |
1.1 |
|
0 |
1.7 |
3.0 |
4.0 |
4.87 |
|
5 |
82 |
1.4 |
1.9 |
2.9 |
25 |
10 |
- |
1.0 |
1.4 |
2.0 |
|
15 |
- |
- |
1.2 |
1.6 |
|
20 |
- |
- |
1.0 |
1.4 |
|
0 |
4.8 |
6.3 |
6.7 |
8.7 |
|
5 |
1.2 |
1.8 |
2.7 |
4.8 |
30 |
10 |
- |
1.4 |
1.9 |
2.8 |
|
15 |
- |
- |
1.5 |
2.1 |
|
20 |
- |
- |
1.4 |
1.7 |
|
|
|
|
|
|
MOTIVE
WATER FLOW (GPM) |
12 |
14.3 |
16.3 |
18.1 |
|
|
|
