Design And Principle Of Operation; Versions - Samson Type 3374 Mounting And Operating Instructions
Electric actuator
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Also See for Type 3374:
- Mounting and operating instructions (134 pages) ,
- Mounting and operation instructions (68 pages) ,
- Mounting and operating instructions (104 pages)
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Design and principle of operation
3 Design and principle of ope-
ration
The Type 3374 Electric Actuator is used in
industrial plants as well as in heating, venti-
lation and air-conditioning systems.
The actuator is suitable for form-fit attach-
ment to various SAMSON valve series, de-
pending on the version with or without
fail-safe action.
The stepper motor is switched off by tor-
que-dependent switches in the end positions
or in case of overload. The force of the mo-
tor is transmitted to the actuator stem via ge-
aring and ball screw.
The Type 3374 Actuator is optionally availa-
ble with either integrated yoke (Fig. 1) or
using an M30x1.5 ring nut (Fig. 2) including
the necessary stem connecting parts.
Testing according to DIN EN 14597
The Types 3374 Electric Actuator with
fail-safe action "actuator stem extends" is
tested by the German technical surveillance
association (TÜV) according to
DIN EN 14597 in combination with various
SAMSON valves. The register number is
available on request.
3.1 Versions
The Type 3374 Electric Actuator is available
with or without fail-safe action.
Version with fail-safe action
Type 3374-2x and Type 3374-3x Actuators
are able to perform a fail-safe action and
contain a spring assembly and an electroma-
gnet. The actuator moves to the fail-safe posi-
tion when the electromagnet is de-energized.
10
Fig. 1: Construction with integrated yoke
Fig. 2: Construction for mounting with ring nut
EB 8331-3 EN
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