I N S T R U C T I O N S
For the installation and maintenance of D C 1 5 2 5 - D C 1 5 5 0
d e s u p e r h e a t e r s
IMI0049E.doc
Rev.0 20/08/14
20090 SEGRATE (MI)- via E.Fermi
EMAIL:
TEL.(02) 269912.1 - FAX.(02) 2692.2452
Page 15 of 16
10 SPARE PARTS
When ordering spare parts, check and specify the identification number of the unit (shown on the data
plate). For a cross-section drawing, see Fig. 1.
10.1
INSPECTION PROCEDURE
The spray nozzles (1) and (2), the fastener rings (5), the piston (4) and the piston rings (3) are
components subject to wear. The materials selected must be suited to the conditions of service of
applications on gas/liquid. It is also advisable to bear in mind that the temperature changes that take
place at the desuperheaters are generally the largest in the whole plant. After the first year of service, you
are advised to check the condition of the spray nozzle assembly, the integrated injection nozzles, fastener
ring and the welds. At the time of inspection, use penetrating liquids to check that these components are
not cracked. Components with signs of cracking must not be re-used. Every two years of service
inspection is recommended to be sure the nozzles are free from defects.
In any case it is recommended to replace the above components at least every five years of service.
Note:After each maintenance operation, restore your stock of spare parts. Please take into account that
the delivery time of special spray nozzle assemblies designed for a particular type of service is 8 weeks.
10.2
STORAGE
At the time of receipt, check that the crate and the desuperheater are free from damage. If you find
damage to either the product or the package, notify a Carraro representative immediately. Before
stocking the equipment, repair any superficial damage to the packaging in order to prevent the entry of
dust or liquid. Check the information shown on the data plate and in the documentation, then return the
units to their respective boxes/crates with the protective materials in place. In the event of short-term
storage (up to 6 months), no additional conservation measures are necessary. Store the units in their
original packing in a clean, dry, indoor place.. Check that the desuperheater is completely dry and free
from humidity. Apply a layer of lubricant, such as Cosmo, to machined surfaces, to the valve plunger and
to the gland. Store the desuperheaters in their original packing and inspect them every 3 months to check
their condition. Before putting the desuperheaters in service, replace the sealing system and check the
soundness of all components, such as the actuator seals, etc. in order to ensure correct operation. Follow
the installation procedure shown in the use and maintenance manual.
ATTENTION!
Should it be necessary to weld the pipes, avoid connecting the
earth connection to the valve, as this could cause damage to
important sliding parts.
11
REPAIRS
11.1
If it is not possible to eliminate the problems, send faulty desuperheaters to the
supplier/manufacturer, together with a description of the problem.
