22
HYDRAULIC CONNECTIONS
Check that the suction line does not exceed the maximum height of 1.5 m from the tank bottom. Unscrew the pipe-wrench
nut and remove the two protective caps from fittings (in the case a pump head needs to be removed, it is recommended to
reuse the protective caps, to prevent any leakage from the pump body).
Note:
If the product to be dosed is sulfuric acid, previously remove any water from the pump and use polyethylene pipes.
All operations to tighten the pipe connections of the pumps must be done by hand, without using any tools (e.g. pliers
squeeze tube), to avoid damaging the hydraulic connections.
Suction Line
(also see drawing)
1. Unscrew the fixing nut of the suction fitting (located on the bottom of pump
head) and remove the protective cap.
2. Cut the PVC Crystal, transparent tube.
3. Insert the pipe-wrench and tube-press on the tube.
4. Mount the tube on the conic hose of the suction fitting, pushing it until it
reaches the stop collar.
5. Fix the tube by screwing the pipe-wrench nut onto the suction fitting of the
pump head.
6. Locate the PVC Crystal tube inside the tank and/or the suction lance.
7. Unscrew the pipe-wrench nut of the foot filter.
8. Cut the PVC Crystal, transparent tube.
9. Insert the pipe-wrench on the tube.
10. Mount the tube on the conic hose of the foot filter fitting, pushing it until it
reaches the stop collar.
11. Fix the tube by screwing the pipe-wrench nut onto the foot filter fitting.
12. Screw the foot filter onto the suction lance (if used) and/or locate it in its
working place.
Notes:
•
The foot filter must be located at a minimum distance of 5 cm from the tank bottom.
•
If a dense product is dosed, it is recommended to remove the small inside filter from the foot valve, in order to facilitate
the suction.
Bleed Line
1. Cut the PVC Crystal, transparent tube.
2. Insert the tube on the bleed outlet, located on the right side of the pump head.
3. Insert the other end of the tube in the tank of the product to be dosed, in order to recover the product that comes out
when the bleed valve is operated.
Injection Line
(also see drawing)
1. Unscrew the fixing nut of the head fitting (located on the top of the pump head) and remove the protective cap.
2. Cut the white, semi-rigid, PE tube.
3. Insert the pipe-wrench and tube-press on the PE tube.
4. Mount the tube on the conic hose of the pump fitting, pushing it until it reaches the stop collar.
5. Fix the tube by screwing the pipe-wrench nut onto the head fitting of the pump head.
6. Place the head tube avoiding as much as possible the curves and ensuring that it does not rub against rigid bodies for
effect of the pulses.
7. Perform all electrical connections (see related section later in this manual) and power the pump.
8. At the injection point on the pipeline, mount a ½” GAS connection, internally threaded (not supplied).
9. Wrap PTFE tape to the thread and tighten the injection valve to the fitting.
10. Unscrew the pipe-wrench nut of the injection valve fitting.
11. Cut the white, semi-rigid, PE tube.
12. Insert the pipe-wrench on the PE tube.
13. Mount the tube on the conic hose of the injection valve, pushing it until it reaches the stop collar.
14. Screw the pipe-wrench nu tonto the valve fitting.
Note:
The injection valve also works as non-return valve: do not disassemble it internally.
