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|  MIL-D-16196E(SH)
be installed by the shipyard, or as a self-contained "package type" unit ready
for operation after installation as a unit by the shipyard, as specified (see
6.2).
Unless otherwise specified, type II distillers shall be "package" type
only.
The base of package type units shall be suitable for resilient mounting to
The units
the ship's structure using resilient mounts as specified (see 6.2).
shall consist of the following:
One evaporator.
(a)
One or more heat exchangers, the primary heat exchanger for
(b)
heating the feed and cooling brine and distillate shall be of the
plate type.
Equipment to keep the evaporator free from noncondensible gases.
(c)
One centrifugal vapor compressor, with pulley and belts, if
(d)
required, and motor and controller.
Distillate pump in accordance with MIL-P-18472.
(e)
Brine pumps in accordance with MIL-P-18472.
(f)
When specified (see 6.2), feed pump to supply designated feedwater
(g)
pressure in accordance with MIL-P-17840 or MIL-P-17639 as
applicable.
Salinity indicating equipment in accordance with MIL-S-15103.
(h)
Solenoid operated, three way bypass valve in accordance with
(i)
MIL-V-16556.
A distillate totalizing meter, feed and distillate flowmeters or
(j)
rotameters as approved by the contracting activity or Government
agency, thermometers, and duplex feedwater strainer in accordance
with MIL-s-17849.
(k)
One set of accessories to complete the unit including pressure
gauges in accordance with MIL-G-18997, ammeters (one for the
electric heater circuit and one for the compressor motor
circuit) , pilot light to indicate when heaters are operating,
regulating flow control and relief valves, and electric immersion
heaters complete with automatic and manual control switches.
Electric immersion heaters may be
3.3.1 Electric immersion heaters.
installed in a copper-nickel (see 3.2 and 3.2.2 for composition) tank separate
from the evaporator. When installed in the evaporator, electric immersion
heaters for stabilization of operation shall be installed in the distillate side
of the evaporator in such manner that they will be immersed in distillate under
If no positive means are
all conditions of inclination of the ship (see 3.3.9).
used to keep the heaters immersed in water for all ship motion and attitude, then
a low water level shutdown device shall be provided to protect the heaters.
3,3.1.1 Additional requirements for electric immersion heaters are as
follows:
(a) Additional electric immersion heaters, as required for satisfac-
tory operation with feedwater between 28 and 85F, shall be
provided for installation in the feed or distillate line ahead of
the heat exchangers.
The heaters shall be provided with electric
switches (see 3,15,1.2) thermostatically controlled, to turn the
heaters off when the temperature of the feedwater is such that
additional heating over that supplied by the stabilization
8
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