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4.4.1.3 UNIBLOC 300-450 Single Mechanical Seal Removal
Loosen the
Stud Nuts (item 43 in Figure 4.4.1)
. Remove the
Rotor Housing
by pulling on the ports or by tapping gently with a
rubber mallet. Do not rock the Rotor Housing back and forth excessively. The seals may break. The
Seal Retaining Rings
, the
Bolts
, the
Stationary Seal Faces
, and the
Stationary Seal O-Rings
will all come off with the Rotor Housing. Unscrew the
Bolts
to remove the
Seal
Retaining Rings
, the
Stationary Seal Faces
, and the
Stationary Seal O-Rings
. Slide the
Rotating Seal
Faces
and the
Rotating Seal O-Rings
off the shafts. To avoid damage, handle and store the loose
Stationary Seal Faces
and
Rotating Seal Faces
so that their lapped sealing surfaces do not get scratched. If not being replaced, the
Drive Collars
may
remain on the shafts, otherwise loosen the set screws and slide them off the shafts. UNIBLOC-PD 500 Series may use wear
sleeves, See section 4.4.4.1 sketch.
4.4.1.4 UNIBLOC 300-450 Single Mechanical Seal Installation
The shafts and the rotor housing bores should be cleaned before installing the seal components. Slide the
Drive Collars
on the
shafts. Moisten the
Rotating Seal O-Rings
with water or coat them with a lubricant that is acceptable for use with the product.
Slide the
Rotating Seal O-Rings
onto the shafts and then the Rotating Seal Faces, slotted sides first. Align the slots in the
Rotating Seal Faces
with the pins in the
Drive Collars
. Push the
Rotating Seal Faces
against the
Drive Collars
so that the
Rotating Seal O-Rings
seat properly. Place the
Stationary Seal O-Rings (front & outer)
on the
Stationary Seal Faces
. Only
lubricate these o-rings with water or alcohol. Push the
Stationary Seal Faces
into the rotor housing so that they seat flat with the
step in the housing. Some applications require pins to be used in the
Stationary Seal Faces
. When placing them in the rotor
housing align the pins with the holes in the rotor housing and press them in. 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 surfaces. If
Seal Retaining Rings
were supplied with the pump, bolt them to the rotor housing.
Proceed to section 4.4.7 to complete the installation
. After
installing the housing push the
Drive Collars
toward it. Compress the
Wave Springs
while leaving a 2-3mm (0.08”-0.12”) gap
between the
Drive Collars
and the
Rotating Seal Faces
. Tighten the Drive Collar set screws.
UNIBLOC-PD 300-450 with Single Mechanical Seals