Assembling Valve And Actuator; Electrical Connections - Samson 3214 Mounting And Operating Instructions

Assembling valve and actuator

3 Assembling valve and
actuator
If the valve and actuator have not already
been assembled by the manufacturer, or if
the original actuator of a control valve is to
be replaced by a different type or size, re-
move the transport protection and proceed
as described below.
Type 3374 Actuator (Fig. 1, top)
1. Use the manual override (see section 5)
to slightly retract the actuator stem into
the actuator.
2. Place the actuator onto the valve body
and tighten the hex nut (12) using a
tightening torque of at least 100 Nm
(width across flats SW 36).
3. Place the coupling nut (7) over the ends
of the actuator stem and the plug stem
and tighten using the two hex nuts.
Type 3274 Actuator (Fig. 1, bottom)
Required rod-type yoke: order no.
1400-8822
1. Place the rod-type yoke (5) onto the
valve body and tighten the hex nut (12)
using a tightening torque of at least
100 Nm.
2. Attach the adapter (11) to the plug stem
(∅ 10 mm) using the coupling nut (7).
3. Place the actuator onto the rod-type
yoke (5) and tighten using the hex
nut (9).
4. Pull the adapter up to the actuator stem.
Mount the coupling nut (10) and tighten
using the hex nuts.
8
EB 5868-1 EN
4

Electrical connections

Upon installation of the electrical con-
nections, observe the regulations con-
cerning electrical power plant systems
according to DIN VDE 0100 as well as
the regulations of your local power
supplier.
Use a suitable power supply, which
guarantees that no dangerous voltages
are applied to the device in standard
operation or when the plant or parts of
the plant fail.
Caution!
Only connect the device to the main
power network when the power is
switched off.
Only use power interruption devices
that are protected against unintentional
reconnection of the power supply.
Particularly for 24 V, 50 Hz actuators,
use wires with a sufficiently large
cross-section to guarantee that the per-
missible voltage tolerances of ± 10 %
are not exceeded.
Additional electrical equipment
The actuators can be equipped with limit
switches, potentiometers or positioners for
input signals from 4 or 0 to 20 mA, or 2 or
0 to 10 V.
For details refer to
mounting and operating instructions EB ...
Type 3374
Type 3274
–> EB 8331-1 EN
–> EB 8340 EN