22 UNIBLOC-PD Operation & Service Manual: PD200-576
4.4.3.2 Double Mechanical Seal Installation
Place the
Stationary Seal O-Rings (primary & secondary)
in the rotor
housing seal bores and the
Flush Housing
s. Only lubricate these o-rings with
water or alcohol. Push the
Stationary Seal Faces (primary)
into the rotor
housing so that they seat flat with the step in the housing. Push the
Stationary
Seal Faces (secondary)
into the
Flush Housings
making sure the o-rings seat
properly. Do not use objects that will scratch the Stationary Seal Faces’ seal
surface to push them in. Place a product compatible lubricant on the sealing
surface of the
Stationary Seal Faces.
While the rotor housing is lying flat with the cavity facing down, stack the seal
components on the
Stationary Seal Faces (primary)
. Begin with
Rotating
Seal Faces (primary)
, slotted sides up. Place the
Rotating Seal O-Rings
(primary)
into the
Rotating Seal Faces (primary)
. Next, place the
Drive
Collars
into the the
Rotating Seal Faces (primary)
. Making sure to align
the slots with the pins, push the
Drive Collar
gently to seat the o-rings. Place
the
Rotating Seal O-Rings (secondary)
on the
Drive Collars
. Align the slots
with the pins, and push gently to seat the o-rings. Place the
Flush Housings
over the stacked components, rotating them to make sure one set screw will be
visible through the port holes in the Flush Housings. Push the housings down
gently. Screw in the
Bolts
and hand tighten. Lubricate the plastic mounting
sleeves and slide them, tapered end first, into the seals. Tighten the
Bolts
.
Leave the sleeves in the seals and
proceed to section 4.4.7 to complete the
installation.
MOUNTING
SLEEVE
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