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Steam Jet Ejector
E1000 Series |
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Primetech offers
complete range of steam jet vacuum ejectors, steam jet syphon for
various industrial vacuum applications. Steam jet vacuum ejectors are
like a compressor that utilizes high pressure steam as motive fluid to
compress gas (suction) to atmospheric pressure from a sub atmospheric
pressure (vacuum) at the suction of the system. Compression of a single
stage ejector is limited due to its inherent performance
characteristics, jet ejectors are mostly staged by connecting the
ejectors in series to produce higher vacuum at the inlet of the system. |
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Ejector Stage |
Referred Nomenclature |
Suction
Pressure Range (Vacuum) |
Vacuum System Stage |
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Stage discharging to atmospheric pressure |
Z stage |
50 to 800 Torr |
Single stage |
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Stage connected to Z |
Y stage |
4 to 125 Torr |
Two stage |
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Stage connected to Y |
X stage |
1 to 25 Torr |
Three stage |
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Stage connected to X |
W stage |
100 µ to 3 Torr |
Four stage |
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Stage connected to W |
V stage |
10 µ to 500 µ |
Five stage |
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Stage connected to V |
U stage |
3 µ to 90 µ |
Six stage |
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The multistage system
often incorporates condensers between X & Y stages and Y & Z stages and
after Z stage to reduce motive steam consumption for the system and lower
emissions to the atmosphere.
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OPERATING PRINCIPLE |
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High pressure motive steam
when passed through the ejector nozzle, the steam expands through the nozzle
which converts pressure to a high velocity jet of steam at the outlet of the
nozzle. This high velocity. Steam jet entrains and mixes with the suction
gas and the combined flow passes through the venturi diffuser where the gas
is compressed to an intermediate pressure between suction and motive
pressures.
Steam jet ejectors are
capable of producing suction pressures up to 50 torr in single stage
operation discharging to atmospheric pressure. But in order to reduce the
steam consumption, for vacuum requirements below 100 torr, generally
multistage ejector system with condenser in between stages can be used.
Necessary barometric installation arrangements (11.5 mtrs. Baro leg) will
need to be provided for gravity draining of condensate from inter-stage
condensers. If barometric installation is not possible due to site
limitations, a low level operating system can be provided.
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APPLICATIONS |
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MATERIAL
OF CONSTRUCTION |
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Standard material of
construction |
Carbon Steel, SS 304
& SS 316 |
Machined or
Fabricated |
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Corrosive resistant
materials |
Hastalloy, Monel,
Inconnel, Titanium, Teflon, Graphite |
Machined or
Fabricated |
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End connections |
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For Smaller ejectors up to
80 NB size (3 inches), suction & discharge connections will be flanged and
motive steam connection will be threaded.
For Large fabricated
ejectors, all connections will be of flanged. The standard versions of
ejectors are provided with ANSI B16.5 150 # flanges. Alternatively, as per
the customers’ requirements, the other international standard flanges can
also be provided.
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Dimensional table |
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SIZE
MM |
DIMENSIONS mm |
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S &
D |
M |
A |
B |
C |
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25 |
25 |
20 |
100 |
80 |
225 |
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40 |
40 |
25 |
120 |
100 |
340 |
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50 |
50 |
40 |
125 |
120 |
445 |
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65 |
65 |
40 |
150 |
130 |
560 |
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80 |
80 |
50 |
150 |
145 |
670 |
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Dimensional table |
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SIZE
MM |
DIMENSIONS mm |
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S &
D |
M |
A |
B |
C |
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100 |
100 |
50 |
180 |
200 |
915 |
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125 |
125 |
50 |
215 |
230 |
1150 |
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150 |
150 |
75 |
230 |
250 |
1370 |
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200 |
200 |
75 |
280 |
280 |
1780 |
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250 |
250 |
100 |
320 |
305 |
2235 |
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300 |
300 |
100 |
370 |
330 |
2700 |
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350 |
350 |
100 |
400 |
330 |
3150 |
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400 |
400 |
150 |
430 |
380 |
3580 |
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450 |
450 |
150 |
480 |
400 |
4040 |
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500 |
500 |
200 |
525 |
430 |
4470 |
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600 |
600 |
200 |
580 |
480 |
5385 |
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Note:
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Dimensions may vary with respect to
service duty & moc.
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Steam consumption will be provided
against spearfish enquiry.
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Shell & tube type
Surface condensers and direct contact type spray condenser can be offered
for inter condenser / after condenser application.
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