14 3 R 74 en
There is no need to adjust the stop screw if the actuator
is re-installed in the same valve. Drive the actuator pis-
ton to the housing end (open position).Turn the actuator
by hand until the valve is in the open position (unless it
is already open). Fasten the actuator in this position.
The actuator may be installed in another position with
respect to the valve by selecting another keyway in the
actuator, see Fig. 37.
❑ Check the tightness of the stop screw at the end
of the cylinder during cylinder operation. The
threads must be sealed using an appropriate
non-hardening sealant, e.g. Loctite 225.
❑ Check that the actuator is functioning correctly.
Check the segment flow bore position and the
actuator movement relative to the valve (clock-
wise: close, counterclockwise: open) after install-
ing the actuator. The valve should be closed
when the piston is in the extreme outward posi-
tion.
❑ Check that the yellow arrow indicates the posi-
tion of the segment. If necessary, change the
position of the arrow.
6.5 Installing B1J actuators
Spring-return actuators are used in applications where
valve opening or closing movement is needed in case
the air supply is interrupted. The B1J type is used for
spring-to-close operation; the spring pushes the piston
towards the cylinder end, the extreme outward position.
In turn, the B1JA type is used for spring-to-open opera-
tion; the spring is between the piston and the cylinder
end and pushes the piston towards the housing.
Spring-return actuators are installed in a manner similar to
B1C series actuators, taking into account the following.
6.5.1 Type B1J
Install the actuator so that the piston is in the extreme
outward position. The cylinder must not be pressurized
and air supply connections must be open. The valve
must be in the closed position, see Fig. 10.
6.5.2 Type B1JA
Install the actuator so that the piston is in the cylinder-end
position at housing side. The cylinder must not be pressu-
rized and the air supply connection must be open. The
valve must be in the open position, see Fig. 10.
The rest of the installation procedure is the same as for
B1C actuators.
6.6 Detaching B series actuators
❑ Disconnect the actuator from its power source;
detach the air supply pipe and control signal
cables or pipes from their connectors.
❑ Unscrew the bracket screws.
❑ Detach the actuator using a suitable extractor,
see Fig. 37. The tool can be ordered from the
manufacturer.
❑ Remove the bracket and coupling, if any.
6.7 Installing a Quadra-Powr® actuator
Quadra-Powr actuators may be used for spring-to-
close and spring-to-open operations depending on the
installation position. After selecting the desired opera-
tion, see Fig. 39 for the correct installation position.
Fig. 37 Changing the actuator position
Fig. 38 Detaching an B series actuator
CAUTION:
Beware of the segment movement!
Fig. 39 Installation of a Quadra-Powr actuator and
adjustment of the open and closed limits
SPRING
TO
CLOSE
SPRING
TO
OPEN
The valve is behind the actuator!
OPEN limit
CLOSED limit
CLOSED limit
OPEN limit
Casing
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