ProMinent Makro TZ Operating Instructions Manual page 16

Function description
Page 16
Function description of a diaphragm liquid end (for TZMb and TZMa)
The diaphragm (2) hermetically seals the pump volume inside the liquid end (3). When the
diaphragm (2) is moved into the liquid end (3) the suction valve (4) closes and the metering
chemical flows out of the liquid end via the discharge valve (1). When the pump diaphragm (2)
moves in the opposite direction the discharge valve (1) closes due to the negative pressure in the
liquid end and fresh feed chemical flows into the liquid end via the suction valve (4).
1
2
3
5
4
Fig. 10
1
2
3
4
TZMb TZMa
1 Discharge valve
2 Pump diaphragm
3 Liquid end
4 Suction valve
5 Diaphragm rupture
indicator (TZMb only)
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