ProMinent Makro/ 5 Operating Instructions Manual page 20

Functional description
Functional description of the dia‐
phragm liquid end (for M5Ma)
20
The diaphragm (3) hermetically shuts off the pump volume of the
dosing head (2) from the outside. The suction valve (4) closes as
soon as the diaphragm (3) is moved in to the dosing head (2) and
the feed chemical flows through the discharge valve (1) out of the
dosing head. The discharge valve (1) closes as soon as the
metering diaphragm (3) is moved in the opposite direction due to
the vacuum pressure in the dosing head and fresh feed chemical
flows through the suction valve (4) into the dosing head. One cycle
is thus completed.
1
2
3
4
Fig. 9: Cross-section through the liquid end
1 Discharge valve
2 Dosing head
3 Diaphragm
4 Suction valve
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