Documents are only to be used and distributed completely and unchanged. It is strictly the users´ responsibility to check
carefully the validity of this document with respect to his product. manual-no.: 999019 / 22/12/2009
page 20 of 29
Assembling pump heads
➨
Use
face wrench with torque indicator
(recommended:
face
wrench with torque indicator from VACUUBRAND, Cat.-
No.: 63 75 80
) to assemble diaphragm clamping disc, dia-
phragm and diaphragm support disc (and eventually wash-
ers) to the connecting rod.
☞
Make sure that the square head screw of the diaphragm
clamping disc is correctly seated in the guide hole of the
diaphragm support disc.
Optimum torque for the diaphragm support disc:
6 Nm.
☞
The optimum torque is achieved if the pointer in the handle
of the VACUUBRAND face wrench shows to the longer mark-
ing line.
➨
Position new diaphragm between diaphragm clamping disc
with square head screw and diaphragm support disc.
☞
Make sure that the square head screw of the diaphragm
clamping disc is correctly seated in the guide hole of the
diaphragm support disc.
☞
Note:
Position diaphragm with white PTFE side to diaphragm
clamping disc (to pump chamber).
➨
By turning eccentric bushing (front of connecting rod), bring
connecting rod into a position in which diaphragm is in con-
tact with housing and centred with respect to bore.
Reassemble in reverse order.
➨
Install head cover, valves and housing cover with housing
cover insert.
☞
Make sure that the
valves are correctly seated
: Valves at
the outlet with round centred opening under valve, valves at
the inlet with kidney-shaped opening beside valve.
➨
By turning eccentric bushing, bring connecting rod into up-
per turning point position (Max. stroke of the rod).
☞
Pay attention that the diaphragm stays positioned centrally
so that it will become clamped uniformly between housing
and head cover.
➨
Screw in four socket head screws fixing housing cover cross-
wise (e. g. in the sequence
➀
,
➁
,
➂
,
➃
) first slightly, then
tighten.
☞
Do not tighten until head cover is in contact with housing,
torque
12 Nm
.
➂
➂
➂
➂
➂
➃
➃
➃
➃
➃
➀
➀
➀
➀
➀
➁
➁
➁
➁
➁
