UNIBLOC-PD Operation & Service Manual: PD200-576 23
4.4.4 Double O-Lip™ Seal
This type of seal is most frequently used with liquids that are very difficult to seal because of high viscosity. The seal comes as
a single cartridge that is easily serviced. The maximum shaft rotational speed for this seal is 1,5m/s (4,9ft/s) and the maximum
service pressure should not exceed 10 bar (150 psig). The seal does not require external lubrication and can be run dry for short
periods. It is available for all models except
UNIBLOC
200-0, 200, 250, and 275 which has the two lips only and not the two
shaft o-rings.
UNIBLOC-PD 501
Series
has front loaded seals. The seal comes as a single cartridge that is easily serviced. The maximum
shaft rotational speed for this seal is 1.5 m/s (4.8 ft/s), or 500 rpm, and the maximum service pressure should not exceed 10 bar
(150 psig). The seal does not require external lubrication and can be run dry for short periods. This seal comes as standard on
UNIBLOC-PD 501 Series Truck/Transport pumps.
4.4.4.1 UNIBLOC 200-575 Double O-Lip™ Seal Removal
Loosen the stud nuts (item 43 in Figure 4.4.1). Remove the rotor housing (item 1 in Figure 4.4.1) by pulling on the ports or by
tapping gently with a rubber mallet. The entire seal with all components will come off attached to the rotor housing. Remove the
Bolts
and
Seal Retaining Rings
. Pull the
Double O-Lip Seal Cartridges
out of the rotor housing bores. If optional sleeve is
used, sleeve will be removed with cartridge.
4.4.4.2 UNIBLOC 200-575 Double O-Lip™ Seal Installation
Check the shafts or optional sleeve for wear. If grooves are noticeable, they may have to be replaced. Place new
Seal Cartridge
O-Rings
into the groove of the
Double O-Lip Seal Cartridges
. Clean the rotor housing seal bores. Apply product compatible
lubricant to the bores and the shafts. Place the rotor housing so that the seal bores are pointing up, push the
Double O-Lip Seal
Cartridges
in, lip side first. Attach the
Seal Retaining Ring
to the rotor housing with the
Bolts. See section 4.4.7
for completing
the installation.
UNIBLOC-PD 200-575 Double O-Lip Seals
Seal Cartridge O-Rings
Double O-Lip Seal Cartridges
Seal Retaining Rings
Bolts
Summary of Contents for 54001010P20H6010T12E
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