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6.2 Replacement of wearing part set
Caution!
Risk of injury due to pre-tensioned spring.
The vacuum version and the version controlled by external air
contain a pre-tensioned spring which may fly out of the valve
during disassembly and cause injury.
▶ Remove the valve carefully.
note!
Make sure that no dirt enters the valve when replacing the
wearing part set.
→ Remove the pilot valve ② as described in chapter "5.2", page
4 (this step is not required for DN 20, DN 25 and DN 40).
→ Loosen the screws ④ (is not required for DN 8).
→ Remove the flange ⑤ and the flat seal ⑥.
With DN 8, only remove the flat seal.
With the vacuum version, additionally remove the spring ⑦.
→ With the version controlled by external air: Unscrew the
reducing nipple ⑰, subsequently remove the O-ring ⑯ and the
spring ⑮.
→ Unscrew the nut ⑭.
→ Remove the collar retainer with sliding sleeve ⑧, the seal ⑩,
the cover plate ⑪, the washer ⑫ and the serrated washer ⑬
from the body ⑨.
→ Insert the new collar retainer with sliding sleeve ⑧ into the
body ⑨.
→ Pull the seal ⑩, the cover plate ⑪, the washer ⑫ and the ser-
rated washer ⑬ onto the collar retainer ⑧.
→ Tighten the nut ⑭ while observing the tightening torque from
"Tab. 1".
→ With the vacuum version: Insert the spring ⑦.
→ Place the flat seal ⑥ on the body ⑨.
Caution: Ensure that the seal is installed on the correct side!
→ Position the flange ⑤ and screw it into position using the
screws ④. Tightening torque 2 Nm. (This step is not required
for DN 8.)
→ Install the pilot valve ② as described in chapter "5.2", page 4.
→ With the version controlled by external air: Insert the spring ⑮
and the O-ring ⑯, subsequently screw in the reducing
nipple ⑰ hand-tight.
Orifice DN
Tightening torque [Nm]
Tightening torque values for the nut ⑭
Tab. 1:
8
12– 40
0.5
3
7
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