Samson 3725 - Heavy-Duty Version

40 EB 8394 EN
Mounting and start-up
5.5.1 Heavy-duty version
Î Required mounting parts and accesso-
ries: Table6 on page18.
Prepare actuator and mount possibly re-
quired adapter supplied by the actuator
manufacturer.
1. Mount the housing (10) onto the rotary
actuator. In case of VDI/VDE attachment,
place spacers (11) underneath, if neces-
sary.
2. For SAMSON Type3278 and VETEC
S160 Rotary Actuators, screw the adapt-
er (5) onto the free end of the shaft or
place adapter (5.1) onto the shaft of the
VETEC R Actuator. Place adapter (3) on-
to Type3278, VETEC S160 and VETEC R
Actuators. For VDI/VDE version, this
step depends on the actuator size.
3. Stick adhesive label (4.3) onto the cou-
pling in such a manner that the yellow
part of the sticker is visible in the window
of the housing when the valve is OPEN.
Adhesive labels with explanatory sym-
bols are enclosed and can be stuck on
the enclosure, if required.
4. Fasten coupling wheel (4) on the slotted
actuator shaft or adapter (3) using screw
(4.1) and disk spring (4.2).
5. Unscrew the standard follower pin (2)
from the positioner's M lever (1). Attach
the follower pin (Ø5mm) included in the
mounting kit to pin position 90°.
6. Mount connecting plate (6) for required
G¼ connecting thread or pressure
gauge bracket (7) with pressure gauges
on the positioner, making sure the two
seals (6.1) are seated properly. Dou-
ble-acting springless rotary actuators re-
quire the use of a reversing amplier on
the connection side of the positioner
housing (refer to section5.5.2).
7. For actuators with a volume of less than
300 cm³, t the restriction (order no.
1400-6964) into the signal pressure out-
put of the positioner (or the output of the
pressure gauge bracket or connecting
plate).
8. Fasten the positioner onto the adapter
plate (12).
9. Place the positioner together with the
adapter plate on the housing (10) and
screw it tight. Taking the actuator's direc-
tion of rotation into account, adjust lever
(1) so that it engages in the correct slot
with its follower pin (Fig.14).
1
10
4
Actuator turning
counterclockwise
Actuator turning
clockwise
Fig.14: Direction of rotation