Samson 3372 - Version with Direction of Action Stem Retracts; Mounting Types

EB 8313-3 EN 3-5
Design and principle of operation
3.3.2 Version with direction of
action "stem retracts"
When the signal pressure is reduced or the
control signal fails, the springs move the ac-
tuator stem upward and open a mounted
globe valve. The valve closes when the signal
pressure is increased enough to overcome
the spring force.
3.4 Mounting types
There are two types of mounting depending
on the valve/actuator combination: mount-
ing using a crossbeam or rods (see Table 3-1
and Table 3-2).
When the actuator is mounted to the valve
using a crossbeam (form B, Fig.3-5), the ac-
tuator is fastened to the valve bonnet using a
central nut.
When the actuator is mounted using rods
(form C, Fig.3-6), the actuator is connected
to the valve bonnet using rods. In this case, a
crossbeam is not required for mounting the
actuator. A plate keeps the correct distance
between rods in the 350cm² version.
Both mounting types are described in the
'Mounting and assembly' section.
Fig.3-5: FormB: mounting using crossbeam
Fig.3-6: FormC: mounting using rods (in this
example: 350cm²)
Table 3-1: Mounting onto HVAC valves
Actuator area 120cm² 350cm²
Travel 15mm 30mm
Type ... Valve size DN
3214 65 to 100 Form B –
3214 125 to 250 – On request
3260 65 to 80 Form B –
3260 100 to 150 – On request