CTX PRO PH-RX Notice D'installation, Emploi Et Entretien page 68

C) Locate the pump as shown in fig. 5 bearing in mind that it may be installed either below or above the level of the liquid
to be dosed, though the level difference should not exceed 2 meters. When the process plant in which the pump is installed is
operating at atmospheric pressure (no back pressure) and the chemical tank is situated above the plant (Fig. 6), the condition
of the injection valve should be checked at regular intervals, because excessive wear and tear could cause additive to drip
into the plant even when the pump is shut down. If the problem persist, install a properly calibrate counter-pressure valve
(C) between injection point and the valve. In the case of liquids that generate aggressive vapours, do not install the pump
above the stor-age tank unless the latter is hermetically sealed.
D) The discharge nipple will always remain in the upper part of the pump. The suction nipple, which serves to attach the
hose (with filter) leading into the chemical tank, will therefore always be situated in the lower part of the pump.
E) Remove the protection caps from the two nipples, slide the hoses over the connectors, pushing them
right home, and then fix them with appropriate tube nuts. (Fig. 7).
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Fig. 5
Fig. 7
Fig.6
Fig. 8