ROPAC COMPONENT SEALS
Installation, Operation & Maintenance Instructions
7
TYPE R33/34/50
Installing the Seal
Before starting the installation, read the following instructions carefully,
both to be aware of special information and because the fitting sequence
may be different depending on the construction of the pump. These
instructions assume fitting onto a plain shaft from the impeller end of a
dismantled pump.
1. Remove the protective packaging from the seal; check for damage and
wipe clean. Save package label for future reference.
2. Fit the seat/mating ring into the gland plate. Check that the gland
plate O-ring or gasket is clean, undamaged, and in place, and then
position the gland plate on the shaft, clear of the seal location avoid
impact with shaft.
NOTE
Use a suitable lubricant when fitting the seal.
3. Clean and sparingly lubricate the shaft.
NOTE
As an alternative to the standard set screw drive, the seal may
be driven by a pin set in a separate drive collar or abutment.
4. Pin-driven seals: Remove and discard all the set screw from the
retainer. Fit the seal unit onto the shaft to abut the drive collar,
positively engaging the drive pin.
Set screw driven seals: Adjust the set screw until clear of the retainer
bore. Fit the seal unit onto the shaft and accurately align the back of
the retainer with the seal setting mark. Lightly tighten the set screws
to hold the seal in position, then fully and evenly tighten the screw to
the torque recommended table.
ATTENTION
Accurate torque settings will avoid set screw damage and
eliminate seal movement in operation.
5. Wipe the lapped surfaces of the seal and seat/mating ring perfectly
clean and dry. Install the seal housing, then locate the gland plate
squarely on the fixing studs and pull on the plate to compress the seal
as necessary to fit the retaining nuts.
6. Recheck that the gland plate O-ring and gasket is in position, then
tighten the nuts as advised by the pump instruction manual. Do not
overtighten.
NOTE
If the seal is visible after installation, a working length check
can be made for Type R33 and Type 34. The setting is correct if
the front of the drive collar is lined up with the line cut visible
on the face retainer.
TABLE 1. Socket Set Screw Tightening Torque
(The torque values given below are for stainless steel cup point set screw)
Screw Size
Torque (lubricated) Nm/lbf·ft
M5
3.0/2.2
M6
4.0/3.0
M8
11.0/8.1
M10
16.0/11.8
M12
40.0/30.0
