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13 Inspection and maintenance
13.3 Replacing the plug diaphragm (code 4)
13.3.1 Removing the plug diaphragm
Use of incorrect spare parts!
▶ Damage to the GEMÜ product.
▶ Manufacturer liability and guarantee will be void.
Use only genuine parts from GEMÜ.
●
1. Remove the support ring 20 and the regulating cone 3 (see
chapter "Removing the regulating cone").
6
11
2
20
3
2. Remove the plug diaphragm 2 from the valve spindle 6.
3. Clean all parts and check them for potential damage.
ð Do not scratch or damage parts during cleaning!
4. Replace damaged parts (only use genuine parts from
GEMÜ).
13.3.2 Mounting the plug diaphragm
1. Position plug diaphragm 2 at distance piece 11 via valve
spindle 6
6
11
2
20
3
ð Where necessary, wet the thread of the valve spindle 6
with suitable thread locking compound (e.g. WEICON-
LOCK AN 301-65).
2. Mount the support ring 20 and the regulating cone 3 (see
chapter "Mounting the regulating cone").
GEMÜ 567 BioStar control
CAUTION
13.4 Replacing the plug diaphragm (code 5)
13.4.1 Removing the plug diaphragm
Use of incorrect spare parts!
▶ Damage to the GEMÜ product.
▶ Manufacturer liability and guarantee will be void.
Use only genuine parts from GEMÜ.
●
6
11
1
1. Remove the actuator (see chapter "Removing the actuator
from the distance piece").
2. Undo the cap nuts 18 from the stud bolts 16.
3. Remove the washers 17.
4. Remove the valve body 1 from the distance piece 11.
ð Do not damage the sealing surfaces!
6
11
2
5. Position a WAF 8 open-end wrench on the wrench surface
of the valve spindle 6 (do not damage the spindle surfaces
in the process).
6. Undo the plug diaphragm 2.
46 / 54
CAUTION
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18
17
2
16
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