provided around the entire area used for this purpose,
whether in a separate room or in the same room with
The maintenance operations described below
apply to all gaseous chlorinators, regardless of type.
Some preventive maintenance practices are funda-
mentally a part of normal equipment operations.
Follow these precautions.
When connecting chlorine valves or tubes to
cylinders or equipment, use a new lead gasket each
time, and use only one gasket in each connection.
Guard against condensation on chlorine
cylinder walls by maintaining proper ventilation around
the equipment. Condensation may corrode scales or
other equipment. An electric fan may be enough to keep
the equipment dry.
Do not use direct heat to dry cylinder sur-
Chlorinators and all piping should be inspected
daily for leaks. For chlorine leak detection, an opened
bottle of aqua ammonia (or an aspirator-type bottle)
should be used near all joints, valves, and piping.
White fumes indicate chlorine leaks. Repair
immediately, no matter how small, as they will
increase in size and cause corrosion and damage which
may become extensive. (Keep the ammonia bottle
tightly closed when not in use.)
In addition to leak inspection, all parts and
piping in contact with chlorine gas should be
inspected daily to ensure that operations are
satisfactory. This includes metering devices, valves,
tubing, and so on, which should be disassembled and
cleaned where necessary; the source of trouble
should be determined; and faulty parts should be
replaced at the first indication of weakening.
Tools should not be used on hard-rubber
parts, except a strap wrench, if necessary;
threaded, hard-rubber parts should be hand
Operation of the relief line should be
checked daily; it should be open and contain no
obstructions, such as wasps nests.
The maintenance operation frequency and
schedule of inspections for chlorination equipment are
shown in appendix III, table A. In this and other tables
used throughout the remainder of this chapter, note
that the frequencies shown are suggested frequencies
and may be changed by the local command, as
individual installation conditions call for. The
frequency code used in tables presented in our
discussion is as follows:
Vvariable, as conditions may indicate
Chlorinators can be classified in two different
ways. What are they?
In a semiautomatic type chlorinator, equipment
starts and stops automatically with the water
flow; however, the rate of waterflow is adjusted
in what manner?
Hypochlorinators are sometimes used as
standby equipment for what type of
How often should chlorinators and piping be
checked for leaks?
MAINTENANCE OF CHEMICAL
LEARNING OBJECTIVE: Identify and
understand basic maintenance guidelines for
DRY CHEMICAL FEEDERS
The instructions given apply to all types of
volummetric and gravimetric dry feeders, including
disk, oscillating, rotary gate, belt-type, screw, and