Operating instructions
Air driven diaphragm pump
Series APB.. / APE..
Operating instructions
TA 312 Rev. 15 en 09/2013
Subject to technical modifications!
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21
9 Maintenance
CAUTION !
All maintenance work must be performed only with a
de-pressurised system.
This applies to the suction and pressure line as well as to
the control air.
Properly stop the pump, let
out the medium and close
the shut-off fittings.
Bring the pressure of the control air
down to near zero and ensure that
there is no residual pressure, close
the shut-off fitting in the control air
line
0 bar
CAUTION !
Whenever performing work on the system, be sure that
you have the necessary wear and/or spare parts available
before starting your work.
Handle and store removed parts carefully to prevent
damage.
CAUTION !
All wear parts must be checked at regular intervals for
optimum condition and replaced as necessary.
CAUTION !
When installing or assembling the pump, it must always
be kept level. Otherwise there is a risk that leaks from
fasteners and connectors on metal lines will leak.
9.1 Wearing parts
The wear parts must be regularly replaced depending on how
and how long they have been used to ensure reliable
functioning of the air driven diaphragm pump.
We recommend inspection and replacement of the diaphragms
after:
20 mil. Strokes when aggressive media are
used
10 mil. Strokes when abrasive media are used*
or at least once a year.
* Please note that these are only rough guidelines. When
strongly abrasive media are used, increased wear of the
diaphragms will occur in a much shorter time.
To monitor the number of strokes, we offer an optional stroke
counter (see section 13 „Accessories“).
If more severe operating conditions result in premature
diaphragm rupture, the air driven diaphragm pump must be
properly shut down (see section 8.1) and the diaphragm
replaced as described in section 9.4.
Wear parts on the air driven diaphragm pump include:
Diaphragms
Valve balls
Valve seats
Valve seals
9.2 Spare parts
Spare parts for the air driven diaphragm pump include the:
Control valve