28 I DELLMECO I AODD DIAPHRAGM PUMPS
Disassembly instructions
Unscrew housing bolts [42] carefully. After that, all parts can be removed. Screw the diaphragm [40] off the
actuator shaft [39]. A re-assembly of used piston rings [37] is impossible; they have to be replaced including the O-
rings underneath. To assemble new piston rings [37] carefully shape them like kidneys with locking ring pliers and
insert the rings into the grooves; completely press the rings into the grooves smoothly using some round tool.
Spare part list, pulsation damper series
Damper size:
DM 15
DM 25
DM 40
DM 50
DM 65
DM 80
Pos. Quantity
Description
Material
Part no.
Part no.
Part no.
Part no.
Part no.
Part no.
36
1
Damper housing
AISI 316L
8 15 01 53
8 25 01 53
8 25 01 53
8 50 01 53
8 65 01 53
8 80 01 53
37
3
Piston ring
PPS/PTFE, PE*
1 08 90 18
1 15 85 22*
1 15 85 22*
1 25 85 22*
1 40 85 22*
1
85 22*
38
3
O-ring
NBR
1 08 82 10
1 15 85 10
1 15 85 10
1 25 85 10
1 40 85 10
1
0 85 10
39
1
Actuator shaft
PET / AISI 304*
8 10 40 30
8 25 40 30
8 25 40 30
8 40 40 50*
8 50 40 50*
8 80 40 50*
40
1
Diaphragm
EPDM
-
1 15 50 08
1 15 50 08
1 25 50 08
1 40 50 08
1 50 50 08
TFM / PTFE
1 10 50 05
1 15 50 05
1 15 50 05
1 25 50 05
1 40 50 05
1 50 50 05
NBR
-
1 15 50 10
1 15 50 10
1 25 50 10
1 40 50 10
1 50 50 10
41
1
Damper head
PE
8 10 203 20
8 25 203 20
8 25 203 20
8 40 203 20
8 50 203 20
8 80 203 20
PE conductive
8 10 203 21
8 25 203 21
8 25 203 21
8 40 203 21
8 50 203 21
8 80 203 21
42
4 / 6* / 8**
Housing bolt
AISI 304
8 10 742 50
8 25 742 50*
8 25 742 50*
8 40 742 50*
8 50 742 50**
8 80 742 50**
43
4 / 6* / 8**
Nut covered with washer
AISI 304
1 15 145 50
1 25 145 50*
1 25 145 50*
1 40 145 50*
1 50 145 50**
1 80 145 50**
44
4 / 6* / 8**
Nut with washer
AISI 304
1 15 245 50
1 25 245 50*
1 25 245 50*
1 40 245 50*
1 50 245 50**
1 80 245 50**
45
4 / 6* / 8**
Damper head plug
PE
8 10 058 20
8 25 058 20*
8 25 058 20*
8 50 058 20*
8 65 058 20**
8 80 058 20**
46
1
Muffler
PE
8 10 99 20
8 25 99 20
8 25 99 20
8 40 99 20
8 50 99 20
8 80 99 20
!
CAUTION
Before putting the pulsation damper into operation as well as after some hours of operating, the housing bolts [42] have
to be tightened carefully, as the elements of construction tend to "settle". Fixing the bolts is necessary as well after longer
periods of stoppage, at extreme temperature variations, transport and after dismantling.
Pressure tests of the plant the pump and the damper are included in may only be carried out with the aggregate (pump
and damper) disconnected from the pressure on both ports or by using the pressure the aggregate develops while
operating. The load of a pressure in the plant may damage the pump and the pulsation damper.
Before starting to disassemble the pump, take care that pump and damper have been emptied and rinsed. Further, both
have to be cut off from any energy on the air and product side. If pump and damper is being deported from the plant,
a reference about the delivered liquid has to be attached.
Please respect the relevant additional security advices, if the pump and the damper have been used for aggressive,
dangerous or toxic liquids.
Before putting the pump and the damper back into operation, the tightness of both has to be checked.
