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4.0 Maintenance
4.1 Separator/Filter Sleeve Replacement
A. When to replace Filter Sleeves
At rated flow conditions, when removing liquids,
pressure drop will normally be 1 psi (0.07 bar) or less
across the separator or 5 psi (0.35 bar) or less across
the entire dryer. An increase in pressure drop will
occur only as the filter sleeve becomes loaded with
solid particles. It is recommended that, for maximum
filtration efficiency, the filter sleeves be replaced when
pressure drop across the separator exceeds 10 psi (0.7
bar) or total pressure drop across the dryer exceeds 15
psi (1.05 bar).
B. Procedure for changing separator/filter sleeves
NOTE: Refer to Technical Data Section for correct
replacement sleeve set.
1. Bypass the unit to permit servicing.
WARNING: Depressurize the dryer assembly before
servicing.
2. Remove screws and lift off insulation cap from top of
separator vessel.
3. Models with grooved pipe coupling - loosen bolts and
remove coupling, gasket, and pipe cap.
Models with hand hole - loosen nut and remove yoke,
gasket, and seal plate.
4. Starting in the center unscrew the separator/ filter
cartridge(s) (1) by turning end cap. (Do not remove
nut at this point.)
5. Clean face of inlet manifold (2) with a mild detergent
using a long-handled brush or a clean rag attached to
a rod. Manifold face must be free of dirt and grease
to ensure proper O-ring seal between top cap and
manifold.
6. Remove nut (3) and cap (4).
7. Slide disposable filter sleeve (5) over separator core (6).
8. If necessary, clean separator core with soap and water.
It can be disassembled if necessary.
9. Slide new filter sleeve (5) over separator core (6) and
replace cap (4) and nut (3).
10. Install new O-ring(s) (7) into groove in cap(s).
CAUTION: coat O-rings with grease (Dow Corning O-
ring lube or equivalent) before inserting in groove in
cap in order to keep the O-ring in position during
installation.
a. Coat exposed threads of thru-bolt with an anti-
seize compound to prevent corrosion of the
manifold threads.
b. Starting from outside (cartridges closest to vessel
wall) screw separator/filter cartridge(s) (1) into inlet
manifold connection(s). A cone in the manifold will
guide the cartridge bolt into the female threads. It
is only necessary to finger tighten the cartridge to
ensure the seal.
CAUTION: DO NOT WRENCH TIGHTEN
c. Reinstall grooved pipe coupling or hand hole cover
after inspecting gasket to ensure its integrity.
d. Reinstall insulation cap.
GROOVED PIPE COUPLING
Bolts
HAND HOLE
TILT THE SEAL PLATE
AND GASKET TO FIT IN OPENING
1
2
Grooved
Pipe Cap
Gasket
Coupling
Half
Grooved Pipe
on Housing
NUT
YOKE
HAND HOLE
SEAL PLATE
GASKET
3
4
5
6
7
VESSEL
11
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