Xylem BCF Instruction Manual page 9

8. All bolted joints should be tightened uniformly and in a
diametrically staggered pattern as illustrated below:
START
1
6
9
14
4
7
12
15
9. Frequently and at regular intervals, observe interior and
exterior condition should be according to scale build-up.
CAUTION:
Neglect in keeping all tubes clean may result
in complete stoppage of flow through some tubes with
consequent overheating of these tubes, resulting in severe
expansion strains, leaking tube joints, and damage to the heat
exchanger.
FRONT HEAD
RENEWABLE ANODES
(ZINC)
BCF HCF & SSCF Heat Exchangers Installation, Operation, and Maintenance Manual
16
11
8
3
13
10
5
2
FRONT HEAD GASKET
(BUNDLE & SHELL ASSEMBLY)
10.Exchangers subject to fouling or scaling should be cleaned
periodically. A light sludge or scale coating on the tube
greatly reduces its effectiveness. Therefore, low-fouling
fluids should be used in the shell side of all heat
exchangers with non-removable tube bundles. A marked
increase in pressure drop and/or reduction in performance
usually indicates cleaning is necessary, especially if the
unit has been checked for air or vapor binding and this has
been found not to be the cause. Since the difficulty of
cleaning increases rapidly as the scale thickens or deposits
increase, the interval between cleanings should not be
excessive. interior and exterior condition should be
according to scale build-up.
ANODES
1. Some exchangers may be equipped with renewable
anodes. The purpose of the anodes is to inhibit electrolytic
corrosion. In order to remain active the anodes must be
kept free of scale or other surfaces coatings.
2. On some applications where electrolytic corrosion is not a
problem, pipe plugs may be substituted for the anode. The
pipe plug material selected should be softer than the base
part to avoid pipe thread damage.
CORE
MOUNTING LEGS
REAR HEAD
REAR HEAD GASKET
8