Samson 3730-4 - Reversing Amplifier for Double-Acting Actuators

36 EB 8384-4 EN
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
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4.6).
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. 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 amplier for
double-acting actuators
For the use with double-acting actuators, the
positioner must be tted with a reversing am
-
plier, e.g. the SAMSON Type3710 Revers-
ing Amplier (see Mounting and Operating In-
structions u EB8392).
If a different reversing amplier (item no.
1079-1118 or 1079-1119) is used, follow the
mounting instructions described in sec
-
tion4.6.1.
1
10
4
Actuator turning
counterclockwise
Actuator turning
clockwise
Fig.12: Direction of rotation
6
6.1
7
8
1
1.1
1.2
2
4.1
3
10.1
10
11
5
4.3
4
4.2
4.1
3
5.1
5
10.1
10
4.3
4
4.2
1 Lever
1.1 Nut
1.2 Disk spring
2 Follower pin
3 Adapter
4 Coupling wheel
4.1 Screw
4.2 Disk spring
4.3 Adhesive label
5 Actuator shaft or
adapter
5.1 Adapter
6 Connecting plate (only
for G¼)
6.1 Seals
7 Pressure gauge bracket
8 Pressure gauge
mounting kit
10 Adapter housing
10.1 Screws
11 Spacer
SAMSON Type 3278
VETEC S160, VETEC R
Attachment according to VDI/VDE3845
(Sept. 2010) xing level 1, AA1 to AA4
size, see section15.1
Fit restriction into signal pressure
output for actuators with <300cm³
volume
Fig.13: Attachment to rotary actuators (heavy-duty version)