MIL-P-22085B(SH)
3.3.3 Frames. Purifier frames shall be sufficiently rigid to allow lifting,
handling, shipment, and installation of the units on board ship without disturbing
the alignment of the assembled units such that the normal distortion, weaving, or
vibration of the supporting structures on board ships cannot cause misalignment of
rotating elements.
Special tools or fittings shall be
3.3.3.1 Special tools or fittings
provided by the manufacturer for lifting all items weighing in excess of 16
kilograms (kg) (35 pounds)
3.3.5 Bearings. Bearing installation and lubrication shall be in accordance
For low noise applications, bearings shall be in
with FF-B-171 or FF-B-185
Bearing assemblies
accordance with the construction requirements of MIL-B-17931.
shall meet the vibration requirements for all bearings in accordance with MIL-B-
17931.
Purifier bowl spindle bearings shall be ball
3.3.5.1 Bearing types
Other bearings may be of the sliding contact or rolling contact types.
bearings.
Double row bearings and bearing sets shall be prohibited unless they are the self-
aligning type.
3.3.5.2 Bearing selection. In the selection of bearings, consideration
shall be given to the fact that rolling and pitching of a ship at sea may
introduce unusual radial and axial thrust loads.
3.3.6 Lubricants , Lubricants used for purifier operation, assembly, and
maintenance shall be selected from those standard lubricants listed in
MIL-HDBK-267.
3.3.7 Piping and valves. Connections to ship's piping shall be flanged.
Purifier valves, flanges, piping, bolting gaskets, and fittings interfacing with
ship's systems shall be in accordance with MIL-STD-777.
3.3.8 Prime water connection. A connection shall be provided on purifiers
for purifier bowl prime. The quantity for prime water shall be designated by the
The construction shall minimize water requirements.
manufacturer.
3,3.9 Fuel/water interface control. Control of the interface between liquid
seal (prime water) and fuel shall be achieved by means of a backpressure regulat-
ing valve and gravity discs. Under all operating conditions back pressure shall
be sufficient to prevent aeration and foaming of purified oil.
3.3.10 Adjustment for specific gravity of fuel. The purifier shall include
a set of gravity discs for specific gravity adjustment to ensure achieving the
highest possible degree of purification and clarification for any specific fuel
condition.
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