INTRODUCTION
Section 1. GENERAL
1-1. Scope
b. Report of errors, omissions, and recoin.
mendations for improving this publication by the
a. These instructions are published for the in-
individual user is encouraged. Reports should be
formation and guidance of personnel to whom the
submitted on DA Form 2028, Recommended
Portable Hypochlorination Unit is issued. In-
Changes to Publications, and forwarded direct to
form at ion is provided on the operation, preventive
Commanding General, U . S. Army Mobility
maintenance
and
services,
and
checks
Equipment Command, ATTN: AMSME-MPP,
o r g a n i z a t i o n a l , direct and general support
4300 Goodfellow Boulevard, St. Louis, Mo, 63120.
maintenance of the equipment, accessories,
components and attachments.
b. Number in parentheses on illustrations in-
Refer to TM 740-90-1 for information on the
dicate quanity. Numbers preceding nomenclature
administrative storage of this equipment.
callouts on illustration indicate the preferred
maintenance sequence.
Enemy Use
1-2. Forms and Records
Refer to TM 750-244-3 for information on the
a. DA Forms and Records used for equipment
destruction of this equipment to prevent enemy use.
maintenance will be only those prescribed in TM
38-750,
Section Il. DESCRIPTION AND DATA
1-5. Description
unit are a hydraulically operated hypochlorinator, a
water meter, a pressure regulating valve, and a
a. The portable automatic hypochlorination unit
manual range adjusting valve (globe valve). The
(fig. 1-1 and 1-2), is designed to accomplish
hypochlorinator pumps hypochlorite solution into
automatic chlorination. Where the rate of flow of
the water under treatment at a rate which is
water being treated is likely to vary, automatic
governed by the speed of the water meter. Since the
chlorination is essential if a constant chlorine
speed of the water meter is always directly
residual is to be maintained. In this process, the
proportional to the water flow being treated, the
chlorinator rate of feed is automatically changed to
chlorine application is also proportional to the
suit the flow of water under treatment. If the water
water flow.
flow increases, the chlorine application increases
d. The water flow meter is operated by a small
proportionately. Conversely, if the water flow
flow of water which is diverted from the main line
decreases, the chlorine application decreases
by means of the manual range adjusting valve.
proportionately. In this way, each gallon of treated
When water flows through the valve (fig. 2-2), the
water receives the same amount of chlorine and, if
pressure on the discharge side of the valve is lower
the character of the water remains constant, a
than that on the inlet side by the amount of friction
constant chlorine residual results.
loss created by the valve. For any given setting of
b. The unit is capable of treating water flow
the valve, the pressure difference will increase as
rates from 2 to 100 gallons per minute (gpm), and
the main flow increases and vice versa. Since the
will automatically proportion the chlorine feed
pressure difference is applied to the water meter,
accurately over a range of 10 to 1 for any one
the flow through the meter varies in direct pro-
setting of the range adjusting valve. If for instance,
portion to the flow through the main. The water
the apparatus is adjusted to treat a maximum flow
pressure regulating valve maintains a water
of 100 gpm, it will proportion accurately down to
pressure of at least 10 pounds per square inch (psi)
10 gpm. If the maximum setting is made for a flow
in the system so that the hypochlorinator can be
of 20 gpm, accurate results will be obtained down
operated satisfactorily.
to 2 gpm.
c. The main components of the hypochlorination
