Why the Heat Exchanger Resistance Will Exceed the Allowable Value?

Why the Heat Exchanger Resistance Will Exceed the Allowable Value?

What is the reason that the heat exchanger resistance will exceed the allowable value?
(1)Filter failure
(2)Scaling inside and outside of casing and pipe
 
How to deal with the problem that the heat exchanger resistance exceeds the allowable value?
(1)Clean or replace the filter
(2)Clean the scale by jet flow or chemical



 



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