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APV_SW4_UK-4_082017.indd
UK
Single seat and change-over valve
DELTA SW4
Instruction manual: UK - rev.4
APV
15. Reconstruction of Actuator
With SW4 valves, the size of the actuator can be changed.
Observe the respective line pressure, see table 9.6,
to increase or decrease the actuator sizes
(Ø 74 mm, Ø 110 mm, Ø 165 mm).
15.1. Reconstruction of actuator
Disassembly
Disassembly is carried out as described in chapter 11.
for single seat valves and in chapter 13. for change-over valves.
To change the actuator size, the respective guide rod (4)
must be replaced.
Attention!
Clamp the valve disc in a vice.
The valve disc must not be damaged (use protective cheeks or
cleaning rags). Even inferior damage at the shaft rod can lead to
leakages.
Turn the guide rod out of the shaft by means of the centering
washer and a wrench SW17.
15.2. Assembly of actuator
1. Turn the respective guide rod into the shaft to the actuator.
Tightening torque 40 Nm
2. Further assembly is undertaken in reverse order.
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