emaux CTRL2-5L, Инструкция по эксплуатации и техническому обслуживанию

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CAUTION before carrying out any serv ice on the pump: pump must be accessible at all times for
operation and service. Access must be free and without obstacles.
- Disconnect pump from the mains or from switch contact switch.
- Relieve all the pressure from the pump head and all liquid ends.
- Drain or flush all dosing liquid from pump head. This operation can also be executed by disconnecting the
pump from the plant by turning the pump upside-down for 15 to 30 seconds without connecting the tubing to
the nipples; if this operation is not possible, dismount and remount the pump head using the four mounting
screws. In the event of possible liquid ends leakage (wearing out or damage of "O" ring seals, valves or
hoses) the pump should immediately be brought to a stop, emptying and depressurising the discharge hose
while taking all due safety precautions (gloves, goggles, overalls, etc.).
- Whenever the pump is dismantled from installation, place back the RED protection caps on the nipples to
avoid residual liquid being spilled.
- When dismantling a pump, clean the pump and liquid ends removing all chemical additive residuals present
on the housing and inside hydraulic components.
- For disposing a unit, follow local authorities rules for disposing of equipments and chemical products; send
parts to authorized recycling centers for correct disposal. DO NOT POLLUTE THE EARTH !!!!
REMINDER
: during maintenance operation bear in mind that discharge and suction valves are mounted in
different position according to function .
5.0 – MAINTENANCE
1. Periodically check chemical additive tank level so as to avoid the pump operates without liquid. This would
not damage the pump, but may damage the process plant due to lack of chemical. FX series dosing pumps
are all supplied with level control setting. The level switch is not included therefore to be ordered separately.
Level control stops pump operation once chemical level into the tank is lower than level switch, thus activating
a L.E.D. on the pump
2. Check the pump operating conditions at least every 6 months:
- pump head position, screws, bolts and seals;
- check more frequently where aggressive chemicals are pumped, especially:
- If a reduction of the required additive concentration in the process plant is detected, this could be caused the
reduction of the dosing pump flow rate by valves wearing, in which case they need to be replaced or by the
clogging of the filter which has to be cleaned as in fig.13 here below.
3. The Company suggests periodically cleaning hydraulic parts (valves and filter). We cannot say how often
this cleaning should be done as it depends on the type of application, we also cannot suggest what cleaning
agent to use as this will depend on the additive used.
Operating suggestions when dosing sodium hypochlorite (most frequent case):
a -
Disconnect the pins from the mains or from power switch;
b -
disconnect discharge hose from process plant;
c -
remove the suction hose (with filter) from the tank and dip it into clean water;
switch ON the dosing pump and let it
operate with water for 5 to 10 minutes;
d -
switch OFF the pump, dip the filter into a
hydrochloric acid solution and wait until end
of cleaning;
e -
switch ON the pump again and operate it
with hydrochloric acid for 5 minutes in a
closed-circuit, with suction and discharge
hose dipped into the same tank (fig.14);
f -
repeat the operation with water;
g -
re-connect hoses to dosing pump and
injection valve to the process plant;
h -
re-tighten liquid end screws after 24 hours
in operation, and then after 3 months.
Operator must always protect itself when handling hazardous feed chemicals.
5.1 - HOW TO OPERATE WHEN DOSING SULPHURIC ACID
In case of dosing Sulphuric Acid up to 96% or other aggressive chemicals, bear in mind the following:
1. replace PVC suction hose with polyethylene discharge hose;
2. empty any residual water from the pump head beforehand.
Warning: if water mixes with sulphuric acid it can produce a large quantity of gas with consequent
overheating of the area causing damage to valves and pump head. This operation can also be done with the
pump disconnected from the plant by turning the pump upside-down for 15 to 30 seconds and without
connecting the hose to the nipples; if it’s not possible, unscrew the pump head, empty it and then remount it.
EMAUX provides a special liquid ends configuration for Sulphuric Acid or other aggressive chemicals.
Fig.14
Foot valve / filter Injection valve
CLOSED WATER LOOP
Pump head cleaning
Fresh water bucket