Samson 3276-D, Монтаж и эксплуатация

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10-2 EB 8318 EN
Removal
10.1 Removing the actuator
from the valve
See images in the 'Design and principle of
operation' section
1. Remove all valve accessories mounted on
the actuator.
2. Pressurize the actuator until the valve
reaches 25 % travel.
3. Undo the nut of the travel indicator (919)
at the stem connector clamp (907) on the
plug stem.
4. Unfasten and remove the stem connector
clamp (907) from the actuator and plug
stems.
5. Unfasten the screw connection between
the valve bonnet and actuator yoke.
6. Lift off the entire actuator upwards off the
valve (see 'Lifting the actuator (without
valve)' in the 'Shipment and on-site
transport' section.
10.2 Relieving the spring com-
pression in the actuator
To relieve the compression of the springs in
the actuator, proceed as follows:
Î
Completely unscrew the spring adjuster
(906) on the actuator stem (61) out of
the actuator housing (40).
Additional instructions for Type 3276-R,
fail-close (actuator stem extends)
After opening the diaphragm case and re-
moving the diaphragm plate assembly, carry
out the following additional steps:
1. Unscrew the two screws (915) opposite
each other on the bottom diaphragm
case (900) and replace them with longer
screws, which stick out of the actuator
housing (40) by approx. 50 mm.
2. Unscrew the remaining short screws
(915).
3. Gradually unthread the two longer
screws that you have just inserted in a
crisscross pattern to safely relieve any
possible compression of the spring (595).