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|  MIL-P-18472G(SH)
shall be in accordance with the Navy standard horsepower sizes as specified in
the applicable motor specification (see 3.2.14). If the maximum bhp of the pump
is less than 2, and if there is a possibility of an unpredictable high frictional
load due to improper adjustment of the gland or to some other cause, then the
maximum bhp shall be multiplied by a safety factor of 1.5 minus
(max, bhp) before selecting the next larger Navy standard horsepower size.
4
3.2.14.3 Insulation. Motor insulation shall be in accordance with
MIL-E-917 and shall be class B or F as specified (see 6.2). The stator windings
of the ac motors and the field coils and the armatures of the dc motors shall be
insulated and varnish treated to provide a sealed insulation system in accordance
with the procedures of MIL-M-17060. Regardless of class of insulation specified,
motor temperature rise at rated full motor load shall not exceed 158F in
ambient.
3.2.14.4 Bearings.
Motor bearings shall conform to 3.2.7.2.
3.2.15 Controllers . Motor controllers shall be in accordance with
MIL-C-2212 for ac and dc and shall have the characteristics as specified (see
6.2).
Paint shall not be applied to internal surfaces, rotating
3.2.16 Painting.
parts, surfaces close to running fits, mating surfaces for connections and
fittings, mounting surfaces, identification plates, and instruments. Painting is
not required for external surfaces on non-ferrous metal or corrosion-resisting
ferrous metal alloys containing more than 17 percent chromium and 7 percent
nickel.
Other external surfaces of ferrous metal shall be thoroughly cleaned
and coated with one coat of pretreatment conforming to DOD-P-15328, and one coat
of zinc chromate primer conforming to TT-P-645, followed by a finish coat of
light gray equipment enamel conforming to MIL-E-15090.
3.2.17 Identific ation plates. Identification plates shall be furnished
on each pump and shall be type A or B in accordance with MIL-P-15024 and
MIL-P-15024/5, except that identification plates of plastic or aluminum shall not
be used. They shall be secured to equipment with corrosion-resistant metallic
screws or rivets. The plates shall contain data as follows:
(a)
Manufacturer's name.
(b)
Manufacturer's model or type and size.
(c)
Semite application.
(d)
Manufacturer's serial number.
(e)
Salient design characteristics:
(1) Capacity in gallons per minute.
(2) Total head in pounds per square inch
(3) Speed of shaft in revolutions per minute (r/min).
(4) Brake horsepower.
(5) Test pressure (omit for submarine seawater pump).
(6) Special data vital to the unit.
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