MIL-PRF-12732F
3.5.1 Storage. The unit shall not be damaged by storage under the following conditions
(see 4.5.2.4):
Air temperature
High: +160 °F (+71 °C), time period 4 hours.
Low: -30 °F (-34 °C), time period 6 hours, no solar radition.
3.5.2 Operating. The hypochlorinator shall perform as specified herein in any ambient
temperature from 120 °F to 32 °F. The unit shall function properly when operated in desert
environment conditions, especially blowing sand.
3.6 Hypochlorinator. The hypochlorinator shall consist of a hydraulically operated
balanced diaphragm or single acting diaphragm with spring return, chemical feed pump,
automatically controlled by connection to a water meter. The load placed on the water meter
shall not exceed 8 inch-ounces, and no inaccuracy of metering shall result from the connection to
the hypochlorinator. The diaphragm shall be Hypalon or Viton and the pumping chamber shall
be poly-vinylchloride or Tyril. The suction and discharge valves shall be the poppet type and
shall be corrosion-resisting metal, plastic, Teflon, polyvinylchloride, or Viton. A manual dosage
adjustment shall be provided for varying the hypo-chlorite solution treated water ratio over a
maximum 5:1 range. Water for operating the hypoch1orinator shall be taken from the water
being treated at a rate not to exceed 0.6 gallons per minute (gpm). A range-adjusting valve shall
be located in the main water line. A drain nipple for attaching a 3/4-inch plastic tube shall be
provided in the overflow chamber for disposing wastewater. The unit shall operate against line
pressures up to 100 psig and shall treat flows of 2 to 350 gpm. The hypochlorinator shall
automatically proportion the pumping rate to within ±10 percent for any one setting of the
range-adjusting valve. The main inlet and outlet connection for the water being treated shall be
fitted with standard 4-inch NPT class 125 cast iron companion flanges in accordance with
ASME B16.1 or ASTM A126, class B material.
3.7 Hypochlorite-solution reservoir. The hypochlorite-solution reservoir shall be a
frame-mounted tank having a capacity of 6 gallons, ±1 pint. The material shall be polyethylene
conforming to ASTM D 1248, type-I, class A, category 2, or ASTM D4976, type I, class H,
grade 3, rated for continuous service at 180 °F (82 °C). The dimensions shall be 18 inches long
by 4 inches wide by 18 inches deep.
3.8 Range-adjusting valve. The range-adjusting valve shall be a butterfly valve and shall
be installed in the water-treating conduit for the purpose of creating sufficient pressure drop to
operate the water meter. Manual adjustment of this valve shall serve to shift the automatic range
of the hypochlorinator to one of the three required range positions. The range valve handle shall
be held in position at required settings by means of a secured quick-release pin engaging a fixed
portion of the valve to the body. The valve shall be provided with labels describing the function
of the valve and the location and function of each valve setting.
3.9 Water meter. A 1-inch bronze-disk, frostproof type water meter, conforming to
AWWA-C-700, shall be connected into the water-treating conduit across the range-adjusting
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