
18 UNIBLOC-PD Operation & Service Manual: PD600-677
ROTATING SEAL FACES
ROTORS & PINS
ROTATING SEAL O-RINGS
STATIONARY SEAL FACES
ROTOR HOUSING
SHAFTS
BEARING HOUSING
STATIONARY SEAL O-RINGS
STATIONARY SEAL FACE HOLDERS
STATIONARY SEAL FACE HOLDER O-RINGS
REAR VEW- ROTOR HOUSING
FRONT VEW- ROTOR & BEARING HOUSING
RETAINING RINGS
REAR ROTOR HOUSING STUD NUTS
fig. 4.6
4.4.2.2.1 Single Mechanical Seal Removal- MODELS: PD602, PD652, PD677
(reference figs. 4.1 , 4.6)
Slide the stainless steel
Rotors
off the shafts. If the rotors will not slide off they can be removed simultaneously with
the
Rotor Housing
. Unless they are being replaced,
DO NOT USE PLIERS OR CHANNEL LOCKS TO REMOVE
THE ROTORS. THEY WILL BE DAMAGED.
The
Rotating Seal Faces
,
Pins
, and
Rotating Seal O-rings
are
assembled inside the
Rotors
and will slide out with them. Slide the
Stationary Seal Face
,
Stationary Seal O-rings
,
and
Stationary Seal Holders
out of the housing. To avoid damage, handle and store the loose
Rotating Seal Faces
and the
Stationary Seal Faces
so that their lapped sealing surfaces do not get scratched. If servicing the
Bearing
Housing
, remove the
Rotor Housing
by first loosening the
Rear Rotor Housing Stud Nuts
. Use a hoist and eye bolt
to support the
Rotor Housing
. Tap on the ports with a rubber mallet and pull the
Rotor Housing
off. Unless being
serviced, the
Retaining Rings
may remain attached to the
Rotor Housing
.
4.4.2.2.2 Single Mechanical Seal Installation- MODELS: PD602, PD652, PD677
(reference figs. 4.1, 4.6, 4.15)
Clean all components prior to installing the seals. If the
Rotor Housing
was removed, attach it to the
Bearing Hous-
ing
first. Make sure
Retaining Rings
are attached to the
Rotor Housing
. Using an eye bolt, hoist the rotor hous
-
ing on the
Dowel Pins
(see fig. 4.15 on pg. 24) and slide it on, while at the same time threading on the
Rear Rotor
Housing Stud Nuts
. Tap the
Rotor Housing
with a rubber mallet to seat it properly against the Bearing Housing.
Tighten the
Rear Rotor Housing Stud Nuts
in a cross pattern. Place the
Stationary Seal Faces
against the
Station-
ary Seal Face Holders
so that the pins slide into the slots. Moisten the
Stationary Seal Face Holder O-Rings
with
water or coat them with a lubricant that is acceptable for contact with the product. Slide these components in the rotor
housing bores. If removed from the rotors, lubricate
Rotating Seal O-rings
and slide them in the rotors together with
the
Rotating Seal Faces
locating them on the seal pocket
Pins
on the back side of the the
Rotors
. The
Rotating
Seal Faces
must be pressed in evenly so that the
Rotating Seal O-rings
do not come off. They have been installed
correctly if they do not fall out when tilting the rotors. Do not use objects that will scratch the
Rotating Seal Faces’
surface to push them in. Place a product compatible lubricant on the sealing surfaces of the
Stationary Seal Faces
and
Rotating Seal Faces
. Slide the
Rotors
on the
Shafts
. Proceed to section 4.4.6
to complete the installation.