EBARA EFQT4 - Manual (Page 31)

EBARA Fluid Handling 30
Figure 5. Cartridge Seal Assembly
remove any that exist. The stationary seat bore
must be completely clean before installing the
seal.
CAUTION!
A new seal assembly should be installed any time
the old seal is removed from the pump. Wear
patters on the finished faces cannot be realigned
during reassembly. Reusing an old seal could
result in premature failure.
To ease installation of the seal, lubricate the shaft
sleeve O-ring and the external stationary seat O-
ring with a very small amount of light lubricating oil.
See Figure 5 for seal part identification.
Seal Installation
(Figures 2, 5, 6 and 7)
WARNING!
Most cleaning solvents are toxic and flammable.
Use them only in a well-ventilated area free from
excessive heat, sparks, and flame. Read and
follow all precautions printed on solvent
containers.
Clean the seal cavity and shaft with a cloth soaked
in fresh cleaning solvent. Inspect the stationary seat
bore in the seal plate for dirt, nicks and burrs, and
CAUTION!
This seal is not designed for operation at
temperatures above 160 º F (71º C). Do not use
at higher operating temperatures.
If the seal plate was removed, install the seal plate
gasket (5). Position the seal plate over the shaft and
secure it to the bearing housing with the hardware
(25 and 26).
To prevent damaging the shaft sleeve O-ring (30) on
the shaft threads, stretch the O-ring over a piece of
tubing 1-1/4 I.D. x 1-1/2 O.D x 2 inches long (32mm
x 38mm x 51mm).
SEAL PLATE
O-RINGS
SLEEVE
O-RING
INTEGRAL
SHAFT
SLEEVE
SHEAR
RING
(SHEARED)
STATIONARY
SEAT
STATIONARY
ELEMENT
ROTATING
ELEMENT
DRIVE BAND
SPRING
CENTERING
WASHER
BELLOWS
IMPELLER
SHAFT
IMPELLER
SHIMS
IMPELLER
SPRING
RATAINER