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• For operating mode SO: Remove top cover (14). Pull the spindle components with the braced parts (1 –
8) from the cover bottom (11). Remove the spring centring sheets (12) and the pressure springs (13)
from the cover bottom (11). If the guide is to be replaced (10), undo the groove nut (19) and pull the
guide (10) from the cover bottom (11).
Dismantling of the spindle with braced parts (1 – 8) (Necessary when exchanging the membranes (4) or
when changing the operating mode): Loosen threaded pin (8) to the extend that the thread with the
tension nut (7) is free. Turn tension nut (7) onto the axial tension screw (6) until the upper membrane
disk (3) releases the split rings (2). Remove split rings (2) from spindle (1). Pull membrane disc (3),
membranes (4), plate (5) and axial tension screw with tension nut and threaded pin (6 - 8) off the spindle
(1).
• For operating mode SC: Remove cover top (14), spring centring sheets (12) and pressure springs (13).
Pull spindle components with screwed-on parts (1 – 8) from cover bottom (11). If the guide is to be
replaced (10), undo the groove nut (19) and pull the guide (10) from the cover bottom (11).
Dismantling of the spindle with screwed-on parts (1 – 8) (Necessary when exchanging the membranes
(4) or when changing the operating mode): Loosen threaded pin (8) to the extend that the thread with the
tension nut (7) is free. Turn tension nut (7) onto the axial tension screw (6) until the upper membrane
disk (3) releases the split rings (2). Remove split rings (2) from spindle (1). Pull membrane disc (3), axial
tension screw with tension nut and threaded pin (6 - 8), plate and (5) membranes (4) off the spindle (1).
The following steps are necessary to install the actuator:
• Clean all parts and check them for damage. If necessary, re-work parts or replace with original parts.
• If necessary, plug guide (10) into cover bottom (11). Ensure that the O-ring (10.7) is not forgotten.
Fasten with groove nut (19).
• For operating mode SO: Insert lower split rings (2) into the spindle (1). Push lower membrane disc (3),
axial tension spring with tension nut and threaded pin (6 – 8), the plate (5), the membranes (4) and the
upper membrane disc (3) onto the spindle (1). Insert upper split rings (2) into the spindle (1). Brace the
system by twisting apart the axial tension screw (6) and tension nut (7). Tighten threaded pin (8) to
secure the connection. Insert lower spring centring sheet (12), pressure springs (13) evenly spread
across the diameter and the upper spring centring sheet (12) into the cover bottom (11). Insert spindle
with braced parts (1 – 8) into cover bottom (11). Put on cover top (14). Put hexagonal screws long (15)
with one washer each (16) evenly spread across the diameter into the actuator from the top. From
below, put on the disc (16) and hexagonal nuts (18). Evenly tighten hexagonal nuts (18) until the two
covers (11 and 14) are on top of each other. If the stopper is not in the cover top (14), plug it in.
• For operating mode SC: Insert lower split rings (2) into the spindle (1). Push lower membrane disc (3),
membranes (4), plate (5), axial tension screw with tension nut and threaded pin (6 – 8) and upper
membrane disc (3) onto spindle (1). Insert upper split rings (2) into the spindle (1). Brace the system by
twisting apart the axial tension screw (6) and tension nut (7). Tighten threaded pin (8) to secure the
connection. Insert spindle with braced parts (1 – 8) into cover bottom (11). Place the lower spring
centring sheet (12), pressure springs (13) evenly spread across the diameter and the upper spring
centring sheet (12) onto the plate (5). Put on cover top (14). Put hexagonal screws long (15) with one
washer each (16) evenly spread across the diameter into the actuator from the top. From below, put on
the disc (16) and hexagonal nuts (18). Evenly tighten hexagonal nuts (18) until the two covers (11 and
14) are on top of each other. If the stopper is not in the cover bottom (11) plug it in.
• Mount the other hexagonal screws (17) with the washers (16) and the hexagonal nuts (18) and tighten
evenly.
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