Heavy-Duty Version - Samson Series 3730 Mounting And Operating Instructions

2. Place coupling wheel (4) with flat side
facing the actuator on the follower clamp
(3). Refer to Fig. 11 to align slot so that it
matches the direction of rotation when the
valve is in its closed position.
3. Fasten the coupling wheel (4) and follow-
er clamp (3) tightly onto the actuator shaft
using screw (4.1) and disk spring (4.2).
4. Fasten the bottom pair of brackets (10.1)
with the bends pointing either facing to
the inside or to the outside (depending on
the actuator size) onto the actuator hous-
ing. Position the top pair of brackets (10)
and fasten.
5. Mount connecting plate (6) or pressure
gauge bracket (7) with pressure gauges
on the positioner, making sure the two
seals are seated properly. Double-acting
springless rotary actuators require the use
of a reversing amplifier on the connection
1
2
3
Fig. 10: Mounting the coupling wheel on
Type 3278
EB 8384-6 EN
Attachment to the control valve – Mounting parts and accessories
1.2
1.1
4.1
4.2
5
side of the positioner housing (see section
4.6).
6. Unscrew the standard follower pin (2)
from the positioner's M lever (1). Use the
metal follower pin (Ø 5 mm) included in
the mounting kit and screw tight into the
hole for pin position 90°.
7. Place positioner on the top bracket (10)
and fasten tight. Taking the actuator's di-
rection of rotation into account, adjust le-
ver (1) so that it engages in the slot of the
coupling wheel (4) with its follower pin
(Fig. 11). It must be guaranteed that the
lever (1) is parallel to the long side of the
positioner when the actuator is at half its
angle of rotation.
8. Stick the scale plate (4.3) on the coupling
wheel so that the arrow tip indicates the
closed position and it can be easily read
when the valve is installed.
4.5.1

Heavy-duty version

Fig. 13
− Required mounting parts and accesso-
ries: Table 5 on page 55
Both mounting kits contain all the necessary
mounting parts. The parts for the actuator
size used must be selected from the mount-
ing kit.
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,
37