188.8.131.52 The stuffing box shall be sealed from the pump discharge or an intermediate stage in a
manner satisfactory to the bureau or agency concerned.
184.108.40.206 The design shall be such as to insure that leakage from the glands cannot reach the bear-
ings or be thrown over bearing housings or driving units. This shall preferably be accomplished by
using glands cored out internally and the shafts provided with flingers. Ample drip pockets, spray
shields and drains shall be provided.
220.127.116.11 Gland and lantern rings shall be split in halves with the halves secured together in a
manner to form solid rings for setting up.
18.104.22.168 All stuffing box glands shall be set up by nuts threaded on gland swing bolts, or on studs
secured in the casings.
22.214.171.124 Sufficient space shall be provided between bearings and stuffing boxes to permit easy
rem oval of packing, and inspection and overhaul of bearings.
3.3.5 Couplings. -
126.96.36.199 A flexible coupling shall be installed between the pump and driving unit.
188.8.131.52 Couplings shall be either bronze, bushed with neoprene or equal, or of an all metal type,
providing the design of the coupling is such as to avoid the generation of noise.
184.108.40.206 All coupling hubs shall be keyed to the shafts and secured by lock nuts. For shafts
one inch in diameter and larger, the hubs shall be fitted on a taper with keys parallel to the tapers.
220.127.116.11 A suitable thrust bearing shall be installed at the top of each pump for counteracting any
unbalanced hydraulic or mechanical thrust in either direction. In this connection, consideration shall
be given to the fact that rolling, pitching or list of a ship at sea may introduce thrust loads even
though the unit is in hydraulic balance.
18.104.22.168 Thrust bearings shall be of the combined radial and thrust ball type, They shall preferably
by type 134, class I, single row, angular contact, duplex mounted, ball bearings in accordance with
Specification FF-B-171. Bearings shall be certified "noiseless" in accordance with Specifica-
tion MIL-B-17931 by a Government laboratory.
22.214.171.124 The lower radial bearing shall be of the sleeve type.
126.96.36.199 The use of ball bearings shall be subject to the speed limitations of Specifica-
tions FF-B-171 and FF-B-185, except where prior approval of the bureau or agency concerned has
188.8.131.52 Bearings shall be installed in housings separate from and independent of the stuffing boxes
with adequate protection from gland leakage. Suitable means shall be provided to prevent escape of oil
around the shaft. All baffles, wipers and related parts shall be readily renewable.
3.3.7 Lubrication. -
184.108.40.206 The lubrication of ball bearings shall be in accordance with Specification FF-B-171.
220.127.116.11 An alemite grease fitting, or equivalent, shall be installed to lubricate the lower radial