ENCORE
®
700 METERING PUMP
Cleaning Clogged Solution Tube
Where solution joins water being treated and that water contains consid-
erable hardness, there may be a deposit formed inside the solution tube
at the point of application. In time, this can completely plug this tube
and the deposit must be removed. The best method is by dissolving the
deposit as described in paragraph 4.2.1. Where this condition is known
to exist, clean the solution tube as a part of routine maintenance.
Periodic Preventive Maintenance
To minimize unscheduled shut down and ensure maximum service life,
perform periodic maintenance at specified intervals while the equipment
is in satisfactory condition. Table 4.1 lists the intervals, maintenance
operation, and the preventive maintenance kits required. Before starting
the work, ensure that the appropriate preventive maintenance kits are in
stock. Refer to Section 6 - Preventive Maintenance Kits and Spare Parts
List for the appropriate maintenance kit.
NOTE: Although all parts are designed for long service life, it is rec-
ommended that routine maintenance be performed to safeguard
against unexpected downtime.
Table 4.1 - Scheduled Maintenance Index
Preventive Maintenance Kit
Annually
Replace PTFE diaphragm, PTFE disc
(between diaphragm and back-up
ring), and crosshead bellow seal.
Diaphragm Maintenance Kit
Replace valve sets, which include
the seat, ball, retainer/guide, and
Valve Kit
(Double ball valves: 2 kits required)
Lubricate (refer to paragraph 4.3.1).
Food-grade synthetic oil AAA5499
(W2T10431) (optional)
SAE85W90 Mineral Gear Oil (2 qts)
Six Months
For slurry application or other
abrasive chemical, replace valve
sets every six months.
Valve Kit
(Double ball valves: 2 kits required)
WT.440.400.001.UA.IM.1012
33
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