UNIBLOC-PD Operation & Service Manual: PD200-576 25
4.4.5 Single O-Ring Seal
This type of seal uses one o-ring, or optional quad ring, to seal against a rotating shaft. It is most frequently used when the liquid
viscosity is greater than 2,000 cPs or is sticky. The seal is the least expensive of all shaft seals, but requires more frequent re-
placement. The maximum shaft rotational speed for this seal is 350 rpm and the maximum service pressure should not exceed 8
bar (115 psig). The o-ring seal must never be allowed to run dry as they will be damaged. This seal uses the pumped product as a
lubricant.
4.4.5.1 UNIBLOC 200-275 Single O-Ring Seal Removal
Loosen and remove the acorn nuts from the
Rotor Housing
. Loosen the
Threaded Studs
by locking two M6 nuts against each
other on the exposed threaded stud ends. Remove the
Rotor Housing
by pulling on the ports or by tapping gently with a rubber
mallet. All seal parts will come off with the housing. Remove the
Seal Retaining Rings
by unscrewing the
Retaining Ring Bolts
.
The
Retaining Ring O-Rings
and
Seal O-Rings
can now be removed.
4.4.5.2 UNIBLOC 200-275 Single O-Ring Seal Installation
Check the shafts for wear. If grooves are noticeable, they may have to be replaced. Otherwise, the
Seal O-Rings
may not seal
properly or may fail prematurely. Place new
Retaining Ring O-Rings
into the grooves of the
Seal Retaining Rings.
Apply a
lubricant on the shafts, o-rings, and the rotor housing bores with a lubricant approved for use with the pumped product. Attach the
Seal Retaining Rings
to the
Rotor Housing
with the
Bolts
.
See section 4.4.7 for completing the installation.
UNIBLOC-PD 200-275 Single O-Lip Seals
Summary of Contents for 54001010P20H6010T12E
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