Boiler house
Feedtank ancillaries
2.1.5
ISO 9001
TI-P401-07
AB Issue 5
Cert. No. LRQ 0963008
Description
IT
Immersion Tubes
Note: A flash condensing de-aerator head can be used to mix
flash steam (from a TDS control system), cold make-up water,
and condensate, and sparge it into a feedtank. It is described in
separate literature.
Immersion tubes offer a much neater solution than traditional
sparge pipes, and can reduce many of the problems associated
with them, for example vibration, rusting, and waterhammer.
Immersion tubes are suitable for both new and retrofit applications
where the feedtank is adequately constructed and braced.
Available types
Available as types IT100_, IT150_, IT200_, IT250_, IT300_, and
IT400_ with an integral inside bolt circle sandwich flange to suit
ANSI 150 or EN 1092 PN16. They are available in lengths to suit
TM metric feedtanks. Other lengths can be made to special order.
Immersion tubes are designated by IT followed by DN followed
by length of immersion tube in mm. e.g. IT250-1600 is DN250 and
is 1 600 mm long from the underside of the flange. It is suitable for
a 2 000 mm deep tank.
Capacity - when used without a Mixing Unit (MU)
Spirax Sarco immersion tubes may be:
-
Connected directly to the pipeline, to distribute condensate into
feedtanks.
-
Used with a mixing unit to form a flash condensing de-aerator
head (not applicable to the IT100 unit).
2
1
2
IT type
DN
IT100_
100
IT150_
150
IT200_
200
IT250_
250
IT300_
300
IT400_
400
* Gravity
condensate
(with 5% Flash)
kg/h
1 015
2 285
4 065
6 350
9 145
16 255
Pumped
condensate
kg/h
2 500
5 000
10 000
20 000
30 000
50 000
* For other quantities of flash steam the capacity may be determined
pro rata i.e. for 10% flash capacity is half that shown.
As a general rule the size of an immersion tube should be at least
one DN larger than the condensate return main.
Important note:
The above table is only valid for condensate, where the flash steam
content has to be considered.
When sizing an immersion tube for use with a de-aerator head,
use the guidelines in the flash condensing de-aerator head TI.
The DH/IT has a higher overall capacity as it is able to condense
the flash steam content of the fluid before it enters the tank. We
do not make a mixing unit to suit the IT100.
Limiting conditions
PN2.5 rating. Suitable for condensate at up to 1 bar g, 120°C.
Materials
No. Part
1
Immersion tube
2
Gaskets
Material
Austenitic stainless steel
Silicone rubber (colour may vary)
Local regulations may restrict the use of this product to below the conditions quoted.
In the interests of development and improvement of the product, we reserve the right to change the specification without notice.
© Copyright 2006
