23
DEPA
®
Air Operated Diaphragm Pumps
3. Function:
5/2-way valve, monosta-
ble, air-spring center posi-
tion must be connected.
After the pump stops, the
piston rod has no defined
position.
4. Control:
Suitable control signal for
switching in due time (pre-
vention of impermissible
high loading of the dia-
phragm).
Stroke frequency max:
DJ/DH*15:
2,5 Hz
DJ/DH*25/40: 2,0 Hz
5. Compresed Air Conditioning::
In accordance with the
specifications from the val-
ve manufacturer.
The applicable minimum
requirements on the air
quality, has to be in accor-
dance with 1.4.3 of these
operating instructions.
The following threaded connection are avai-
lable on the pump:
DJ/DH*15:
pipe thread EN 10226 R 1/4
DJ/DH*25/40:
pipe thread EN 10226 R 3/8
The valve must be connected to the pump
using a hose and pipelines PN10 (rated
pressure 10 bar).
Using pumps in potentially explosive areas:
The instructions in 2.13 and 10.0 - 10.4 in
it's present form of the operating manual
have to be applied.
*
DHxx-FA in custom design with control
block for external air control.
4.0 Operation
4.1
General
After correct connection of suction and
pressure line as well as the compressed air
supply the pump is ready for operation.
Warning!
Make sure that the diaphragm is
not subjected to a pressure dif-
ference of more than 2 bar.
Do not expose the pump to sud-
den temperature fluctuations.
This may cause the pump to
start leaking.
Danger!
Do not touch pump or pipeline.
Danger or burning!
Always wear your personal
protective outfit when handling
chemicals.
Environment:
Observe the applicable regula-
tions for storage and hand-out
of chemicals.
Dispose of chemicals according
to legal regulations.
4.2
Switching on the pump
Warning!
The empty pump must never be
immediately subjected to high
pressure.
For automatic switching of the
pump by means of a solenoid
valve we recommend the up-
stream installation of a slow
start valve.
The pump will start to deliver immediately
after opening the air flow.