27I DELLMECO I AODD DIAPHRAGM PUMPS
15. Dellmeco Active Pulsation Dampers for Plastic Pumps
15.1. Main specification
The Dellmeco active pulsation dampers represent the latest generation of active pulsation dampers. They are
specially designed to be used along with DELLMECO pneumatic double diaphragm pumps of the Plastic range. A
general aspect to be considered is, that a pulsation damper decreases the total capacity of the system depending
on the point of operation.
Before putting a DELLMECO pulsation damper into operation, make sure, that the materials of construction
are resistant to the chemical to be pumped. To check this, the exact damper code is required. This code, as well as
the serial number, can be found in the following. Besides, these data are noted on the identification plates on the
damper itself.
Example of the damper type code:
DM
15
P
E
P
Material of damper head:
P - PE
R - PE conductive
Diaphragm material:
E - EPDM
T - TFM/PTFE
N - NBR
Material of damper housing: P - PE
R - PE conductive
T - PTFE
Z - PTFE conductive
Size, nominal connection size: 08: G 3/8”, 10-15: G 1/2", 25: G 1”, 40: G 1 1/2", 50: G 2”, 80: G 3”
DELLMECO pulsation damper.
Air supply connection:
DM 08-25: R 1/8”, DM 40-50: R 1/4" , DM 80: R 3/4”
Max. operating pressure:
8 bar
Max. operating temperature: for damper housing in PE 70
o
C ,
for damper housing in PTFE size DM 08, DM 10 100ºC,
for the other sizes 120ºC (with damper head in PE conductive 80ºC)
For inflammable liquids as well as for applications in explosion protected areas, only dampers made of
conductive polymer materials (codes R and Z) may be used. It is not necessary to ground the damper
separately, as the damper is connected conductively to the pump, which is conductive and has to be grounded
itself.
In general, pump and damper are dispatched completely mounted. Still, they can be packed in separate
boxes, for client’s wish. If so, the damper has to be screwed into the thread at the top of discharge port
carefully, but only until the damper is in contact with the pump. Exceeded tightening may damage the thread.
Besides, a correct positioning of the O-ring [45] within the groove has to be ensured.
The DELLMECO damper can easily be attached to a pump at any time in the future by changing the
discharge port. The use of a pulsation damper of the series DM reduces the capacity of the complete system
in dependence of the point of operation.
Before connecting the pump, take the yellow blind plugs out of
air inlet which is located on the top of the damper head [41]. For
correct operation, the damper absolutely needs an air-supply of its
own, which has to be taken from the air-supply of the pump. Pump
and pulsation damper have to be connected to the same air
pressure. No stop or regulating valve may be placed between
pump and damper. The driving air has to be oil-free, dry and clean.
Together with the pump an empty damper has to be driven slowly.
The dampers are self-regulating for all changing operating
conditions.
