Maintenance
Waukesha Cherry-Burrell
Page 44
95-03057
11/2012
regulations, depending on the location of your facility. It is also a
requirement of most business insurance carriers, so you are
helping to protect your company against potential fines and
uninsured losses. With stakes this high, tube repair by SPX is the
smart bet.
Product Side
The heat exchanger tube is designed to last a long time with little
maintenance.
If tubes wear out prematurely, one or more of the following may
be the cause:
•
Failure to use shaft trough when removing mutator shaft will
cause scratching or gouging of tube wall.
•
Careless assembly and installation of blades.
•
Rotating shaft without product or product flow.
•
Use of the wrong detergent or incorrect use of a detergent.
•
Starting shafts against stiffened or solidified product in tubes.
•
Starting the flow of jacket media (Ammonia, Freon, Steam,
Water, etc.) before establishing full product flow under
operating pressures.
•
Failure to clear tubes of product after every use.
•
Starting operation before dissolving particles such as salt,
sugar, detergents, etc.
•
Using dull blades or blades that have been sharpened below
minimum width specifications.
•
Using blades other than those furnished by Waukesha
Cherry-Burrell.
•
Worn mutator shaft bearings.
Inspection of Chrome
Plated Nickel or Stainless
Steel Tubes
During each inspection of the scraper blades, inspect the inside
surface of the tube for scoring, gouging, and roughness. When
the surface of the plating is damaged or worn through, it may be
rechromed to original specifications by Waukesha Cherry-Burrell.
WCB has the equipment and product knowledge to repair the
tube back to factory specifications and determine if the tube will
comply with ASME specifications.
CAUTION:
Acid cleaners are not recommended for
chrome plated nickel heat transfer tubes. Cleaners should
be compatible with the elastomers in the heat exchanger.
Inspection of Stainless
Steel Tubes
During each inspection of the scraper blades, inspect the inside
surface of the tube for scoring, gouging, and roughness. Shallow
score marks, shallow gouges, and roughness can be taken out by
honing the tube followed by polishing. Depending on the damage
to the tube, Waukesha Cherry-Burrell may be able to rehone the
tube to comply with ASME code specifications.
