IM 25.055AC UA (C/6-01)
AUTOMATIC CHLORINATOR - 3000LB/24HR
42
e. Unscrew valve stem (8) in the center of the top of the upper body
(32). Wipe the surface of the spherical tip of valve stem with a
clean cloth or paper towel to remove any loose material. Soak
briefly in 10% muriatic (hydrochloric) acid if there are any depos-
its that do not wipe away with plain water. If the spherical surface
is indented, worn, eroded, or scratched, replace valve stem.
WARNING: TO AVOID POSSIBLE SEVERE PERSONAL INJURY
OR EQUIPMENT DAMAGE WHEN USING HYDROCHLORIC
ACID, OBSERVE ALL SAFETY PRECAUTIONS RECOM-
MENDED BY THE ACID MANUFACTURER/SUPPLIER.
f. Using a blunt tool, remove the O-ring (31) from the valve seat (9)
(diaphragm clamping screw). Discard the O-ring.
g. Reassemble the valve stem to the upper body and replace the valve
seat O-ring and diaphragm clamping O-ring (outer) prior to as-
sembling the injector body union nut (10).
• Cleaning Poppet Check
a. Unscrew the inlet adapter and discard O-ring (2).
b. Remove the poppet (4) and remove and discard the O-ring (3)
from the poppet.
c. Replace the poppet O-ring (3).
d. Replace the inlet O-ring (2). Wipe a thin film of Halocarbon grease
on the O-ring before installing it.
e. Reassemble the poppet and inlet adapter.
4.11.7 Cleaning 3/4" Fixed Throat Injector (Anti-Syphon) (See Dwg. 25.200.002.020)
The check valve prevents water from the injector from being drawn back
by the vacuum prevailing at shutdown into the control unit and toward the
vacuum regulator during the OFF period.
In continuous or nearly continuous operation, this valve is actuated very
little, and the recommended annual check is principally to assure cleanli-
ness. In automatic start-stop operation, the check valve can accumulate
thousands of opening and closing cycles in six months or less and wear
becomes a consideration in addition to clean surfaces. For either interval
the procedure is as follows:
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