Functional Description; Pump - ProMinent Sigma/ 2 Control S2Cb Operating Instructions Manual

Functional Description

5 Functional Description

5.1 Pump

Illustration of the stroke movement
s
s
18
The metering pump is an oscillating diaphragm pump, the stroke length of
which can be adjusted. An electric motor drives the pump. The slide rod
transmits the stoke motion to the diaphragms.
The stroke movement of the displacement body is continuously measured
and regulated so that the stroke is executed according to a previously set
dosing profile, see chapter
The following dosing profiles are available:
Normal
n
Discharge opti.
n
Suction opti.
n
Every metering profile is ineffective below the switch-
over frequency for Start/Stop mode.
Normal
a)
s
t
0
P_SI_0120_SW
Fig. 6: Stroke movement at a) maximum stroke length and b) reduced
stroke length.
s Stroke velocity
⍵ Cam rotational angle
+ Discharge stroke
- Suction stroke
Discharge opti.
With a discharge optimised dosing profile, the discharge stroke is elon‐
gated, the suction stroke is executed as quickly as possible. This setting is
for example suitable for those applications that require optimum mixing
ratios and as continuous as possible chemical mixing.
t
P_SI_0103_SW
Suction opti.
„Metering" „setting" .
b)
s
ω
180 360 0 180 360
P_PL_0009_SW
ω