SPX FLOW S280 M-14, Manual, Page: 82 / 93

Paraflow Plate Heat Exchanger
Instruction Manual
Section 6.0 Issue 5
Page 26 of 36 June 13, 2008
All liquids must be drained from the heat exchanger
after shut down to prevent precipitation of products or
scale buildup.
If the heat exchanger will be out of service for six
months or longer, it must be properly prepared for
storage. See APV Standard Procedure SP5002 for
instructions. Contact the Customer Service
Department listed in Section 8.0 of this manual for
copies of the procedure and assistance. 6.5 Troubleshooting
APV plate heat exchangers are designed to provide
trouble free service over the life of the unit. However,
conditions or processes may change, resulting in
reduced performance or even leakage. The following
table provides some guidelines for diagnosing
common problems and suggested solutions.
This table is intended as a general guide only.
Assistance in specific cases may be obtained by
calling your nearest Service Center listed in the front
of this manual or the Customer Service Department
listed in Section 8.0.
Troubleshooting Plate Heat Exchangers
Problem Possible Causes Suggested Solutions
1. Reduced Heat Transfer a. The inlet temperatures or flow rates
do not correspond to the original
design.
b. Plate surfaces have become fouled
on either the product or service
side.
c. Freeze
up.
Correct temperatures or flow rates to
design conditions.
Open the heat exchanger and clean the
plates or clean the plates in place by
circulating a suitable cleaning agent --
see Section 7.0.
Correct temperatures or flow rates to
design conditions.
2. Increased Pressure
Drop or Reduced Flow
Rate
a. Plate surfaces have become fouled
on either the product or service
side.
b. Debris is blocking the flow
channels.
See paragraph 1(b) above.
Open the heat exchanger and clean the
plates -- see Section 6.0. Screens or
filters must be installed to prevent
debris from entering the unit.
3. Visible leakage a. Operating pressure exceeds the
rating of the heat exchanger.
Reduce the operating pressure to the
rating of the heat exchanger. If the unit
continues to leak after the pressure is
reduced, the plates or gaskets are
damaged and must be replaced. See
Section 7.0.
Kemper County MM218132 Approved