Functional Description; Liquid End; Operating Modes - ProMinent SCKa Series Operating Instructions Manual

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Functional description

5.1 Liquid End

5.2 Operating modes

The metering pump is an oscillating diaphragm pump, the stroke length of
which can be adjusted. An electric motor drives the pump.
The heart of the liquid end is a highly resistant piston (4) made from
coated stainless steel. The suction valve (1) closes as soon as the piston
(4) is moved in to the dosing head and the feed chemical flows through the
discharge valve (3) out of the dosing head. As soon as the piston moves in
the opposite direction, the discharge valve (3) closes due to the negative
pressure in the dosing head and fresh feed chemical flows through the
suction valve (1) into the dosing head.
Use the flushing collar (6) to flush the sealing surface of the piston.
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2
1
Fig. 4: Cross-section through the liquid end
1 Suction valve
2 Dosing head
3 Discharge valve
4 Piston
5 Packing collar
6 Flushing collar
7 Flushing connector
The operating modes are selected via the
the identity code, some operating modes may not be present):
'Analog' operating mode (Identity code, control variant: analog). The
stroke rate is controlled using an analog current signal via the "External
control" terminal Processing of the current signal can be preselected via
the control unit.
'Manual' operating mode The stroke rate is set manually via the control
unit. 100 % corresponds to 180 strokes/min.
Functional description
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4
6
5
P_SI_0144_SW
'MODE' menu (dependent on
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