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|  MIL-H-12732E
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 opreate 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 pos itions.
The range valve handle shall be heid
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 l-inch bronze-disk, frostproof type water meter,
conforming to AWWA C-700, shall be connected into the water-treating conduit
across the range-adjusting valve. The water meter shall be connected to the
hypolorinator in such a manner that the hypochlorlnator will pump hypochlorite
solution into the water under treatment at a rate which is governed by the speed
of the meter. The water meter shall be provided with a 1/4-inch NPT opening in
A bronze shutoff cock shall be installed
its lower chamber to permit draining.
In the meter drain opening.
3.10 Sight assembly. When specified (see 6.2), a methacrylate plastic sight
assembly shall be provided in the hose connection between the reservoir and hypo-
chlorinator for visual checking of the hypochlorite solution during operation of
the hypochlorinator. The methacrylate plastic material shall conform to
L-P-380, type I, class 1.
3.11 Comparator. When specified (see 6.2), a comparator conforming to
MIL-C-538, for the determination of residual chlorine, shall be furnished.
Strainer. A removable, chemically resistant, plastic strainer shall be
3.12
at tached to the reservoir end of the connection between the hypochlorite-
The strainer shall have a
solution reservoir and the automatic hypochlorinator.
plastic frame covered with polypropylene chloride screening, 1024 openings psi,
diameter of filament 0.012, +0.002 inch.
The entire unit shall be mounted in a frame fabricated from
3.13 Frame.
aluminum tubing conforming to ASTM B 210 or B 221, Alloy 6061, Temper T4 or T6,
1-1/4-inch OD and 0.125-inch wall thickness, or 3/4-inch NPS steel pipe
conforming to ASTM A 120, standard weight, black.
The unit shall be not more than 31 inches high,
3.14 Dimensions and weight.
30 inches wide with reservoir in place, and 33 inches long. The maximum net
weight of the unit shall be not more than 235 pounds.
Unless otherwise specified (see 6.2), a cloth cover made of
3.15 Cover.
material conforming to MIL-C-43006, type 1, class 1 shall be furnished to cover
the framed unit. The thread used In the fabrication of the cover shall conform
to V-T-285, type I, class 1, subclass B, number size 3, olive Drab No. 7.
The unit shall be identified in accordance with
3.16 Identification marking.
MIL-STD-130.
The marking shall be applied to plates conforming to MIL-P-514,
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