Flowserve RIS Seal - Manual (Page 10)

6.3.3 Tighten jam nut 9-1 on the impeller side of the clamp.
6.4 Fill the pump with process fluid or water ensuring air is purged
from pump to check for static leaks. Repair any leaks before
start-up.
6.5 Start the pump and closely monitor seal leakage for approxi-
mately two hours. Seal leakage can be initiated by dimensional
changes in the pump after start-up that may reduce seal com-
pression. Example:
Axial shaft movement due to bearing clearances and thermal
growth. If visible leakage is observed shortly after start-up,
adjust the seal one flat and wait 10 to 15 minutes for the full
effect of the change. If necessary, repeat the procedure no more
than 3 times (6 flat total or 1 complete turn of the nut). If the leak
has not been reduced, it is a static leak or the seal faces have
been damaged. Further adjustment may damage the seal.
For technical assistance or information pertaining to your particular
application, contact your nearest authorized Flowserve distributor.
10
6.3.2 Tighten 9 adjusting nut the number of flats in the table
below. (1 flat = 1/6 turn of the nut)
Stud Size Compression (inches) Compression
(inches) 0.040 / 0.050 Per Flat inches (mm)
3/8 - 16 UNC 4 Flats 0.010 (0.254)
1/2 - 13 UNC 4 Flats 0.013 (0.330)
5/8 - 11 UNC 3 Flats 0.015 (0.381)
3/4 - 10 UNC 3 Flats 0.017 (0.432)
1 - 8 UNC 2 Flats 0.021 (0.533)
Stud Size Compression (Inches) Compression
(metric) 0.040 / 0.050 Per Flat mm (inches)
M10 x 1.5 4 Flats 0.254 (0.010)
M12 x 1.75 4 Flats 0.279 (0.011)
M16 x 2.0 3 Flats 0.330 (0.013)
M20 x 2.5 3 Flats 0.406 (0.016)
M24 x 3.0 2 Flats 0.508 (0.020)