Samson 3286, Монтаж и эксплуатация

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16 EB 8257 EN
Design and principle of operation
Actuator stem retracts (FE)
When the signal pressure is reduced or the
air supply fails, the springs move the actua-
tor stem upwards and open the valve. The
valve closes when the signal pressure is in-
creased enough to overcome the force exert-
ed by the springs.
The actuator's direction of action can be re -
versed, if required. Refer to the mounting
and operating instructions of the pneumatic
actuator:
u
EB 8310‑X for Type 3271 and Type 3277
3.2 Versions
The modular design allows an insulating sec-
tion or metal bellows to be fitted to the stan -
dard valve version.
Actuators
In these instructions, the preferable
combination with a Type 3271 or Type 3277
Pneumatic Actuator is described. The
pneumatic actuator (with or without
handwheel) can be replaced by another
pneumatic actuator in a different size, but
with the same travel.
Î
Observe the maximum permissible actu-
ator force.
If the travel range of the actuator is larger
than the travel range of the valve, the spring
assembly in the actuator must be preloaded
so that the travel ranges match. See associ -
ated actuator documentation.
The basic pneumatic actuator can be re-
placed by a pneumatic actuator with addi-
tional handwheel or by an electric actuator.
3.3 Technical data
The nameplates on the valve and actuator
provide information on the control valve ver-
sion. See section 2.1 and the associated ac -
tuator documentation.
More information is available in Data Sheet
u
T 8257.
Noise emission
SAMSON is unable to make general
statements about noise emission as it
depends on the valve version, plant facilities,
and process medium. On request, SAMSON
can perform calculations according to
IEC 60534, Part 8-3 and Part 8-4 or
VDMA 24422 (edition 89).
Risk of hearing loss or deafness due to loud
noise.
Wear hearing protection when working near
the valve.
Tip
Note
Note
WARNING !