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Paraflow Plate Heat Exchanger
Instruction Manual
Issue 5 Section 6.0
June 13, 2008 Page 27 of 36
Troubleshooting Plate Heat Exchangers
Problem Possible Causes Suggested Solutions
3. Visible leakage
(continued)
b. The heat exchanger is not tightened
adequately for the operating
conditions.
c. Sealing surfaces of plates or
gaskets may be damaged or dirty.
d. Chemical attack of the gaskets.
Tighten the heat exchanger further in
increments of .001 inch per plate,
checking for leakage each time. Do not
tighten below the minimum dimension
shown on the general arrangement
drawing -- See Paragraph 5.6. If leaks
continue, see paragraph 3(c) below.
Open the heat exchanger and inspect
the plates and gaskets. There must not
be any cuts, cracks, debris or flat spots
on the gaskets. Paraclip gaskets must
not have any debris under the gasket.
The plates must be clean and free of
heavy scratches or dents on both sides.
Replace the defective parts.
Identify the source of chemical attack
and correct either by eliminating the
corrosive agent or changing the
material of the gaskets.
4. Cross Contamination a. Cracks in one or more plates.
These may be caused by fatigue
resulting from pressure fluctuations
during operation. Dye penetrant
testing may be required to identify
cracks in the plates -- refer to
Factory Service, Section 8.0 for
assistance.
b. Holes in the plates caused by
corrosion.
Open the heat exchanger and inspect
the plates. Replace the defective parts.
Identify the source of pressure
fluctuations and correct.
Identify the source of corrosion and
correct either by eliminating the
corrosive agent or changing the
material of the plates.
Kemper County MM218132 Approved