www.gemu-group.com
26 / 34
GEMÜ 539
15 Inspection and maintenance
NOTICE
Exceptional maintenance work!
▶
Damage to the GEMÜ product.
●
Any maintenance work and repairs not described in these
operating instructions must not be performed without
consulting the manufacturer first.
The operator must carry out regular visual examination of the
GEMÜ products depending on the operating conditions and
the potential danger in order to prevent leakage and damage.
The product also must be disassembled and checked for
wear in the corresponding intervals.
1. Have servicing and maintenance work performed by
trained personnel.
2. Wear appropriate protective gear as specified in plant op-
erator's guidelines.
3. Shut off plant or plant component.
4. Secure plant or plant component against recommission-
ing.
5. Depressurize the plant or plant component.
6. Actuate GEMÜ products which are always in the same po-
sition four times a year.
15.1 Spare parts
A
1
6
e
f
a
4
30
g
c
d
39
h
b
Fig. 6: Spare parts
Item
Name
Order description
1
Valve body
K536…
4
Sealing washer
539…SVS…
6
Hexagon nut
14
Seat seal
30
Sealing washer
39
Cylindrical screw
A
Actuator
9539…
a
Union nut
-
Item
Name
Order description
b
Spindle
-
c
Valve plug
-
d
Retaining washer
-
e
Stud bolt
-
f
Seat flange
-
g
Union nut
-
h
Locking plate
-
15.2 Removing the actuator
15.2.1 Removing actuator DN 15 - DN 50
1. Move the actuator
A
to the open position.
2. Undo union nut
a
.
3. Lift actuator
A
off valve body
1
.
4. Move the actuator
A
to the closed position.
5. Clean all parts of contamination (do not damage parts dur-
ing cleaning).
6. Check parts for potential damage, replace if necessary
(only use genuine parts from GEMÜ).
15.2.2 Removing actuator DN 65 - DN 100
1. Move the actuator
A
to the open position.
2. Loosen fastening elements between the actuator flange
and the valve body flange diagonally and remove them.
3. Lift off actuator
A
and seat flange
f
from valve body
1
.
4. Remove sealing washer
30
.
5. Clean all parts of contamination (do not damage parts dur-
ing cleaning).
6. Check parts for potential damage, replace if necessary
(only use genuine parts from GEMÜ).
15.3 Replacing the seals
15.3.1 Replacing the seals DN 15 - DN 50
1. Remove the actuator.
2. Remove sealing washer
4
from the valve body.
3. Loosen nut
e
on spindle
b
(hold spindle
b
with appropriate
tool that will not damage the spindle surfaces).
4. Clean all parts of contamination (do not damage parts dur-
ing cleaning).
5. Insert new seat seal
14
.
6. Remove retaining washer
d
.
7. Apply appropriate thread locking compound on the thread
of spindle
b
.
8. Fix spindle
b
in place with nut
e
(hold spindle
b
in place
with appropriate tools which do not damage the spindle
surfaces).
9. Insert new sealing washer
4
in valve body
1
.
Mount the actuator.
