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F−1031, Section 4209
Rev: 01/03/07
Packing − Braided Flexible Graphite (BFG)
Waterous uses a braided graphite fiber, with reinforced flexible graphite yarns
and high purity graphite filament yarns that appear on the corners as well as
throughout the body of the packing. The graphite reinforcement allows the
flexible graphite yarns to provide greater tensile strength.
This type of packing reduces the frictional heat created between the shaft and
the I.D. of the packing. By dissipating the heat through the cross section of the
packing, the heat is transferred to the packing gland and the seal housing.
WARNING
!
Packing Gland and Pump Body Temperature Hazard. May result in
serious burns.
Heat is dissipated through the cross−section of the packing, transferring
the heat to the packing gland and pump body.
Packing Removal
WARNING
!
Truck movement hazard.
May cause serious personal injury.
Stop engine, set the parking brake and chock the wheels before going
under truck to remove packing.
1.
Remove the unbalanced nuts, flat washers and packing gland halves
from one end of the pump.
2.
Engage the pump per appropriate operating instructions. Operate the
pump gradually increasing the discharge pressure until the packing is
forced out of the seal housing. Pressure in excess of 300 psi (20.7 bar)
may be required.
CAUTION
Pump overheating hazard.
May cause damage to the pump.
Circulate enough water through the pump to prevent overheating. Do not
pressurize the pump over 600 psi (41.4 bar).
3.
If all the packing is not forced out, it may be necessary to remove the re-
maining packing by hand, using a pick or similar device. Waterous has a
packing removal tool (P/N 5782) available for this purpose, see Figure 1.
4.
Replace packing per instructions below, repeating the procedure for the
opposite end of the pump.
Figure 2. Packing Removal Tool
IL1931
Packing Installation
1.
Before installing the new packing, be sure that all of the old packing is
removed from the seal housing.
2.
Be sure that the seal housing and the shaft are clean and free of any
packing residue.
3.
Lightly lubricate the packing ring I.D. and O.D. with mineral oil, automo-
tive grease or engine oil for installation purposes.
4.
Make sure packing is clean.
5.
Carefully install one ring of packing. With the aid of packing glands, push
the packing into the seal housing as far as possible. Repeat this opera-
tion with each ring, staggering the joints at least 90
_
apart. Install the
packing rings until the top of the last ring is about 1/4 inch from the end
of the seal housing (at least 1/8 inch is required for the packing gland
nose entrance into the stuffing box), see Figure 3.
