Samson 3275, Mounting And Operating Instructions, Page: 11 / 32

EB 8314 EN 11
Design and principle of operation
The actuator with 804 cm² area does need a
yoke (see Fig. 3). The valve accessories are
mounted over the NAMUR interface.
Refer to the mounting and operating instruc-
tions of the valve accessories to be mounted
for more details on their attachment and the
accessories required.
3.1 Fail-safe action
The double-acting piston actuator has no
springs. A defined final position is not
reached when the signal pressure is reduced
or the air supply fails.
A1
A3
A7
A8
A9
A2
S
S
A10
A4
A1 Piston rod
A2 Piston rod seal
A3 Plain bearing
A4 Base
A7 Piston seal
A8 Piston guide band
A9 Piston
A10 Cover
S Signal pressure
connection
Fig. 3: Type 3275 Actuator (804 cm²)