2.2 Attachment acc. to IEC 60534-6
For the selection of the required mounting
parts, refer to Tables 4 and 5 on page 17.
For positioner attachment according to
NAMUR as shown in Fig. 4, you require an
adapter housing. The valve travel is trans-
mitted via the lever (18) and the shaft (25)
to the bracket (28) of the adapter housing
and then to the pin (27) located at the posi-
tioner lever.
To attach the positioner, you require the
mounting parts listed in Table 4. Which lever
is to be used depends on the rated valve
travel.
The positioner is attached, however, the
arrow
on the black case cover has to point
away
from the
diaphragm actuator
to-
wards the valve.
Exception:
Control valves in which the plug
closes the seat area when the actuator stem
retracts. In this case, the arrow has to point
towards the diaphragm actuator.
If the adapter housing cannot be mounted
between
the actuator and the valve (e.g. ac-
tuators of other manufacturers), the
arrow
on the case cover must point towards the
control valve.
2.2.1 Mounting sequence
NOTE:
Before you mount the parts, apply a signal
pressure to the actuator so that the valve is
set to 50 % of its travel. This will ensure the
exact alignment of the lever (18) and the
bracket (28).
Control valve with casted yoke
1. Use countersunk screws to screw the
plate (20) to the coupling which con-
nects the plug and actuator stem. With
2100 and 2800 cm
2
actuators, use ad-
ditional mounting bracket (32).
2. Remove rubber plug from the adapter
housing and fasten the housing to the
NAMUR rib, using the hexagon head
screw.
Control valve with rod-type yoke
1. Screw plate (20) to the follower clamp
of the plug stem.
2. Screw the studs (29) into the adapter
housing.
3. Place the housing with the plate (30) on
either the right or left side of the valve
rod and screw the housing tight by
using nuts (31). Be sure to align the
housing in such a manner that the lever
to be mounted subsequently is horizon-
tal.
4. Move the clamp (21) to surround the
pin (19). Screw pin in the center row of
bores in the plate (20) and lock it such
that it will be located above the correct
lever marking (1 to 2) for the assigned
travel, see Table 5.
Intermediate values must be calculated.
5. Measure the distance between the cen-
ter of the shaft (25) and the center of
the pin (19). You will be prompted for
this value subsequently during the con-
figuration of the positioner.
14
EB 8382-1 EN
Attaching the positioner
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