30
DEPA
®
Air Operated Diaphragm Pumps
control block. Now you can detach the
complete control valve from the control
block. This is also possible without dis-
assembling the pump first! (Fig. 19).
5.3.1.7 Assembling and disassembling
the pressure booster (DB series)
Assembly:
■
First, connect plate (C) with threaded
socket (A) to pump. Special tool is requi-
red for (A).
■
Mount the pressure booster (B) to the
plate (C) using the 4 cheese head
screws.
Disassembly:
■
Loosen the cheese head screws
■
Loosen the pressure booster (B)
■
Loosen the threaded socket A and plate C
5.3.2 Series DH-FA/SA/SS
5.3.2.1 Replacement of elastomer
components
See information provided under 5.3.1.1.
prevent the O-rings being damaged by
the recess in the bore the O-rings must
not be pushed past the recess. For this
purpose an O-ring is pushed over the
bushing, the bushing is then inserted
into the bore with the side without
O-ring and pressed in until the groove
becomes visible on the opposite side.
Now the second O-ring is placed into
the groove and the complete bushing is
pressed flush into the bore.
The piston rod is only delivered com-
pletely assembled with shell and O-rings.
Replacement of the shell rings is not
possible for technical reasons.
5.3.1.5 Replacement of the external
Q-control valve
■
Loosen four fastening screws on the
control block. Now you can pull out the
complete control valve with pilot control.
This is also possible without disassem-
bling the pump (Fig. 18).
5.3.1.6 Replacement of the outside DEPA
AirSave System (DL15/25/40)
■
Loosen four mounting screws on the
Fig. 19: DEPA AirSave System (DL15/25/40)
Fig. 20:
B
C
A