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A
B
P
P
M
M
A
C
C
C
C
B_04006
OPERATING MANUAL
VERSION 12/2012 ORDER NUMBER DOC 2330426
Double diaphragm pump - operating principle
The double diaphragm pump is driven with compressed air.
Two diaphragms (A) are mechanically connected to each other by means of a shaft (B).
Each diaphragm generates two chambers: pumping chamber (P) and motor chamber (M).
A pneumatic distributor alternately supplies compressed air into one of the driving
chambers (M), thus producing the diaphragms movement and consequently causing one
of the pumping chambers (P) to empty (as a result of volume decrease), while at the same
time the other chamber (P) sucks the uid in (as a result of volume increase). A series of four
check valves (C) prevents the liquid from owing back, thus producing the suction and
delivery phases in each pumping chamber, and generating the pumping e ect.
The ZIP models are equipped with an internal safety valve that opens when the maximum
allowed value of air pressure supply is exceeded.
5.4 MODE OF OPERATION
Overpressure!
Risk of injury from bursting components.
Never change the safety valve setting.
WARNING