Reversing Amplifier For Double-Acting Actuators - Samson 3730-2 Mounting And Operating Instructions

Attachment to the control valve – Mounting parts and accessories
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
Fig. 12: Direction of rotation
38
Actuator turning
counterclockwise
1
10
4
Actuator turning
clockwise
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 amplifier on
the connection side of the positioner
housing (refer to section 4.6).
7. For actuators with a volume of less than
300 cm³, fit 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. Place positioner on 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. 12).
4.6 Reversing amplifier for
double-acting actuators
For the use with double-acting actuators, the
positioner must be fitted with a reversing am-
plifier, e.g. the SAMSON Type 3710 Revers-
ing Amplifier (see Mounting and Operating In-
structions EB 8392).
u
If a different reversing amplifier (item no.
1079-1118 or 1079-1119) is used, follow the
mounting instructions described in sec-
tion 4.6.1.
EB 8384-2 EN