Removing The Actuator; Replacing The Seals; Mounting The Actuator - GEM 550 Operating Instructions Manual

15 Inspection and maintenance

15.3 Removing the actuator

1. Move the actuator A to the open position.
2. Undo union nut a.
3. Remove actuator A from valve body 1.
4. Disconnect actuator A from the control medium lines.
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).

15.4 Replacing the seals

Gasket!
Replace gasket 4 each time the actuator is disas-
●
sembled/assembled.
1. Remove actuator A (see chapter "Removing 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. Remove retaining washer d.
5. Remove seat seal 14.
6. Clean all parts of contamination (do not damage parts dur-
ing cleaning).
7. Insert new seat seal 14.
8. Insert retaining washer d.
9. Apply appropriate thread locking compound on the thread
of spindle b.
10. Fix spindle b in place with nut e (hold spindle b in place
with appropriate tools which do not damage the spindle
surfaces).
11. Insert new sealing washer 4 in valve body 1.
12. Mount actuator A (see chapter "Mounting the actuator").
GEMÜ 550
NOTICE

15.5 Mounting the actuator

Incorrect combination of actuator and
valve body!
▶ Risk of damage to the actuator and
●
●
Rxxxx
Valve body marking 2/2-way
body
Fig. 12: Valve body marking
Actuator product label
RAxxx
RBxxx
RCxxx
RDxxx
RExxx
RFxxx
RGxxx
RHxxx
RJxxx
RKxxx
RMxxx
1. Move the actuator A to the open position.
2. Lubricate the thread of union nut a using a suitable lubric-
ant.
3. Place actuator A on valve body 1 approx. 90° anticlock-
wise to the end position of the control medium connectors
and screw it in hand tight using union nut a.
4. Tighten union nut a with an open-end wrench (for torques,
see table). This rotates actuator A clockwise approx. 90°
to the desired position.
5. Move the actuator A to the closed position.
6. With the valve fully assembled, check the function and
tightness.
Nominal size
[DN]
DN 6
DN 8
DN 10
42 / 46
CAUTION
valve body.
For control valves with a reduced valve
seat, make sure that the combination
of actuator and valve body is correct.
Compare the product label of the actu-
ator with the valve body marking.
Valve body marking: Angle
valve body
Valve body marking
R002
R004
R006
R008
R010
R012
R015
R020
R025
R032
R040
Actuator size
0G / 0M 35
0G / 0M 35
0G / 0M 35
www.gemu-group.com
Rxxxx
Torque
[Nm]