ClimaCool UCH 30, Installation, Operation & Maintenance Manual

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Basket Strainers
Maintenance
Basket strainers require little monitoring once they are
properly installed. The pressure differential across the
strainer should be checked periodically to determine if the
screen needs to be cleaned or replaced . If the pressure
differential goes unchecked and the screen becomes
completely clogged, the screen will break and require
replacing . Note: Strainer screens are not designed to
withstand the same pressure ratings as the housings .
If the basket becomes completely clogged, it will be
exposed to the same pressure as the housing . In most
cases, this will cause the basket to fail and potentially
damage downstream equipment .
Regular maintenance involves:
• Periodically checking for leaks
• Timely cleaning or replacement of screen
During normal use, the basket will become clogged
with foreign matter, causing the differential pressure to
increase. Once the differential pressure has increased to
an unacceptable value, typically by 5 psi to 10 psi, it is time
to clean or replace the screen . It is not advisable to let the
differential pressure increase by 20 psi. This may cause the
screen to fail and possibly damage downstream equipment .
A convenient and safe way to determine when the screen
needs to be replaced is to install pressure gauges on
the inlet and outlet sides of the strainer . The maximum
acceptable pressure drop across the strainer will indicate
when the screen needs to be replaced . Screen size and
construction determine the maximum pressure drop that
a strainer screen can withstand . Please consult factory for
exact pressure ratings .
Strainer Element Cleaning
Before removing the cover of the basket strainer, the
pressure inside the vessel must be reduced to atmospheric
via suction or venting . Failure to do so may result in serious
bodily injury .
1. Isolate the basket strainer by closing the inlet and outlet
valve connections on either side of the basket strainer .
2. Open vent or drain plug to relieve pressure inside the
basket strainer. Drain fluid up to screen seat level.
3. Once pressure is relieved, remove the cover .
4. Remove baskets and clean . Avoid banging or hitting the
screen to remove stubborn debris .
5. Inspect basket and cover gasket for damage . If either is
damaged, replace . Always ensure there is a spare gasket
and basket on hand prior to maintenance .
6. Remove any debris or sludge from within the basket
strainer .
7. Replace clean basket into its original position, enrusing
it is squarely positioned on the screen seat .
8. Replace cover gasket and replace and tighten cover .
Follow the Start-up precedure outlines within the Operation
Instructions .