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2.3 - LIQUID ENDS MATERIALS
DIAPHRAGM: PTFE
PUMP HEAD: Polypropylene; upon request: PVC, 316 Stainless, PTFE, PVDF
NIPPLES: polypropylene
FILTER: polypropylene
INJECTION NIPPLE: polypropylene
SUCTION HOSE: PVC - flexible
DISCHARGE HOSE: polyethylene
VALVES "lip"type: FPM (viton), (upon request available in EPDM (Dutral), NBR, Silycon)."Ball Check" VALVES
upon request type in SS 316 and Glass PYREX. Available with Spring Return and "KALRETZ"Valve.
SEALS: FPM upon request EPDM (Dutral), NBR, Silycon, PTFE only for ball checks valves
2.4 - HRS MODE
This dosing pump has two different operating modes: standard and HRS advanced modes.
(High Rating System) is a patented concept that allows working range pump widening. By setting
working pressure (within a preset range of values) the pump automatically self-controls the flow rate at ope-
rator's desired working values. Flow rate can be set within 0,1l/h step value. Compared to ordinary pumps HRS
(High Rating System) allows an improved pump performance and an enlarged operating range, making possible
the correct flow rate setting at different pressures avoiding volume fluctuations connected to different working
pressures, even with high viscous liquids. In the following ghraphs it is showed flow rate vs. system pressu-
re in standard and HRS modes.
2.5 - FLOW RATE CALIBRATION PROCEDURE
The flow rate values, expressed in liters per hour showed by the chart on the front panel have been obtained
using water at 25°C, for a set of pressure values that varies within 1 bar fixed steps. To have an accurate
dosing with liquids of different viscosity and density or dosing at different pressure values it's possible to
calibrate the flow setting as following:
1. First of all measure the flow rate the pump doses (with the discharge line connected);
2. To activate the HRS CALIBRATION PROCEDURE the pump has to display the flow rate in L/H in stand-by
status;
3. Press contemporarily the arrow buttons (buttons #2-3) for about 1 second. The value of the display will start
flashing; press arrow buttons to set the measured flow rate;
.
4. Press START/STOP(#4) button to confirm.
For example, if a 15 l/h at 4 bar pump, with pressure set at 5 bar, will show 15.1 l/h.
Changing the flow rate from 15.1 to 14.3, it means a decreasing of 5% not only of the default setting of 5 bar,
but also of every pressures of the HRS mode.
To RESET the correction and so come to the default setting, it will be enough to set any value of pressure and
correcting the value of maximum flow rate as displayed on the table of reference displayed, with the procedure
above explained.
P
Default
l/h
0
35,0
1
29,6
2
23,2
3
20,7
4
17,3
5
15,1
6
13,0
7
11,4
•
21
•
Calibration
l/h
33,1
28,0
22,0
19,6
16,4
14,3
12,3
10,8
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