SPX FLOW S280 M-14, Manual, Page: 85 / 93

Paraflow Plate Heat Exchanger
Instruction Manual
Issue 5 Section 7.0
June 13, 2008 Page 29 of 36
7.0 MAINTENANCE
7.1 Opening the Frame
Opening Tie Bar Frames
Drain all fluids from the heat exchanger and allow it to
cool. Loosen the tie bars evenly in reverse order of
steps 1 through 6 in Paragraph 5.6. Remove the tie
bars and push the follower towards the end support
(Figure 25) . The plates may now be separated for
cleaning and inspection.
7.2 Inspection
Check the front and back of every plate for cleanliness
and freedom from debris. Product build up and scale
will reduce the performance of the heat exchanger and
cleaning is required - See Paragraph 7.3.
Check each plate for cracks or holes. Some cracks
may not be readily visible and will require dye
penetrant inspection to locate them. Contact your
nearest APV Service Center listed at the front of this
manual.
Gaskets must be thoroughly checked for cuts,
flattening, cracks, brittleness, breakage and proper fit
of the gasket groove. The gasket groove in the plate
must be free of distortion or kinks.
The entire gasket and sealing surfaces of the plates
must be totally free of any debris since any foreign
material will cause leakage and may damage the
gasket. When installing clip in gaskets, careful
inspection is required to be sure there is no debris or
glue from previous gaskets under the installed gasket
which will cause leakage.
7.3 Clean In Place (CIP)
Cleaning in place is accomplished by circulating a
suitable cleaning solution through the heat exchanger
instead of opening it. This removes deposits or
trapped product on the plates. CIP works best in the
reverse direction of normal flow. Good results are also
possible with same direction flow and higher velocities.
If the product to be flushed out has a high viscosity,
the circulation flow rate must be large enough to reach
a sufficient speed for flushing out the product.
If the product pump is volumetric, it may be necessary
to insert a pump for the cleaning solution in parallel to
the former. It is assumed that the fouling on the plates
is soluble in a cleaning solution that does not attack
plates and gaskets.
Great care must be taken to select proper cleaning
solutions and cycles to avoid damaging the plates and
gaskets. Due to the large variety of cleaning needs,
each user is responsible for determining the best
method for his situation. It is recommended that a
WARNING:
Never open a Paraflow until the unit has
been cooled below 100
°
F (38
º
C).
Never open a Paraflow which is under
pressure from any source.
Never open a Paraflow with piping
connected to the follower or connector
grids.
Figure 25
Kemper County MM218132 Approved