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12838 Stainless Drive, Holland, MI 49424
MECHANICAL SEAL REPAIR,
Continued
10. Remove any burrs or sharp edges (such as along a
keyway) that the seal must pass over to prevent
damage to the shaft packing. When installing the
seal, provide protection for the shaft packing from
cuts by covering keyways and holes with a sleeve or
Scotch tape. Lubricate the shaft and shaft packing
with a lubricant compatible with the tank contents.
11. Before installing the seal, insure that all seal
components and mating surfaces are clean and free
from dirt, deposits, old gaskets, etc.
12. Refer to the seal manufacturer's instructions for
proper seal installation and seal setting procedure.
13. After seal installation and before start-up, check all
shaft hardware, seal mounting hardware and drive
collar set screws for proper tightness. Checks for
shaft run-out at the top of the seal while rotating the
mixer shaft by hand (rotate gear drive input shaft
while observing a dial indicator mounted to indicate
run-out at the seal). Shaft run-out at the seal must
not exceed .005" T.I.R. when rotated by hand.
14. For lubricated seals, connect all flushing lines, purge
lines, etc. and fill and bleed the seal cavity with clean
lubricant before starting mixer.
15. Pressurize the seal cavity (double seal only) to 20
PSIG above tank operating pressure.
Copyright 2018 BRAWN Mixer
SEAL INSTALLATION
1. Install mixer on tank nozzle with all bolts thru
mounting flange and tighten to recommended torque
specifications.
2. Insert mixer shaft from inside tank up thru opening in
flange and safely support in place.
3. Install all seal parts over the end of the shaft in the
proper order and the proper orientation while
protecting the seal faces from any contact. Let the
disassembled seal parts sit loosely until steps 4 thru
8 are complete.
4. Attach removable coupling on top end of shaft with
key, thrust washer, and thrust bolt(s). Tighten and
check torque to recommended specifications.
5. Align shaft coupling with rigid drive coupling and
secure with bolts (8).
6. Tighten and torque all bolts to recommended
specifications.
7. Remove all shaft supports used for support such that
the shaft is freely hanging.
8. Install impellers and/or hubs on to the shaft at this
time.
9. Position the stationary seat of the seal in the pilot
and secure with the gland ring. Assemble the rest of
the seal as indicated in the following drawing. Also,
follow all instructions in the seal manufacturer's
assembly pages given at the end of this manual.
www.BRAWNMIXER.com
2/5/2018
& M
Phone: 616/399-5600 Fax 616/399-3084
MECHANICAL SEAL
INSTALLATION
AINTENANCE
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