Main T E N An C E; Ho W T O O P E Rat E Wh En D O S In G Su Lp H U Ric Ac Id ( M A X 50% ) - CTX PRO PH-RX Normas De Instalación, Uso Y Manutención

Main t e n an c e

Periodically check the chemical tank level to avoid the pump operating without liquid. This would not dam-age the pump,
but may damage the process plant due to lack of chemicals.
Check the pump operating condition at least every 6 months, pump head position, screws, bolts and seals; check more
frequently where aggressive chemicals are pumped, especially:
pulse and power L.E.D.;
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the additive concentration in the pipework; a reduction of this concentration could be caused by the wearing of
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the valves, in which case they need to be replaced (Fig. 10) or by the clogging of the filter which then has to be
cleaned as in point 3 here below.
The Company suggests periodically cleaning off the 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):
Disconnect the pins from the mains or by means of a onnipolar switch with 3 mm minimum distance between
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the contact.
Disconnect discharge hose from pipework;
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Remove the suction hose (with filter) from the tank and dip it into clean water;
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Switch on the metering pump and let it operate with water for 5 to 10 minutes;
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Switch OFF the pump, dip the filter into a hydrochloric acid solution and wait until the acid finishes cleaning
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Switch ON the pump again and operate it with hydrochloric acid for 5 minutes in a closed-circuit, with suction
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and discharge hose dipped into the same tank;
Repeat the operation with water;
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Re-connect the metering pump to the pipework.
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Ho w t o o p e rat e wh en d o s in g su lp h u ric ac id ( M A X 50% ) .

In this case it is essential to bear in mind the following:
Replace PVC crystal suction hose with polyethilene discharge hose;
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Empty any residual water from the pump head beforehand.
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Warning: if the water mixes with sulphuric acid it can produce a large quantity of gas with consequent over-heating
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 impossible, dismount and remount the pump head (Fig. 11) using the
four mounting screws.
Fig. 10
ENGLISH
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