Injection Valve Assembly Diagram - ETATRON D.S. BT MA/AD Notice D'installation, Emploi Et Entretien

If the pump has to be removed from the plant for any reason whatsoever, it is recommended to reuse the protection
capsules to avoid liquid loss from the pump body.
f. Priming the pump: if the pump is supplied with a discharge valve, connect the outlet piping and follow the
sequence shown in fig.8.
8 A – Unscrew the discharge tap knob.
8 B – With the pump operating, keep open the discharge valve B until all the air in the piping and the pump body
is expelled.
8 C – Close the discharge tap.
If priming the pump becomes difficult extract air from the discharge fitting using a syringe and decrease the
number of pulsations, if the pump does not have a discharge valve extract air from the outlet fitting using a
standard syringe with the pump in motion until liquid can be seen in the syringe or in the suction piping. To
connect the fitting to the syringe, use a piece of suction piping.
g. Avoid all unnecessary bends on the outlet and suction piping.
h. Select the most appropriate injection point on a pipe of the plant to be treated and fit a steel 3/8" female gas
connector. This connector is not supplied with the pump. Screw the injection valve to the gas connector, using
Teflon® tape as a gasket as shown in Fig. 9. Connect the discharge piping to the conical connector on the injection
valve and lock it with the ring-nut G. The injection valve also acts as a non-return valve.
NB. The seal ring D must not be removed.
3.1 – INJECTION VALVE ASSEMBLY DIAGRAM
Fig. 9
22
Fig. 8