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6.3 B1C actuator
❑ Drive the actuator piston to the extreme end of
the cylinder and turn the valve to closed position.
❑ Clean the actuator stem bore and remove any
burrs.
❑ Insert the coupling into the stem bore, if neces-
sary. Note the correct position of the actuator
stem. A line at the end of the shaft and the cou-
pling indicate the direction of the ball flow bore.
❑ Lubricate the coupling and the stem bore and
place the brackets on the valve.
❑ Carefully push the actuator onto the shaft. Exces-
sive force may damage the ball and the seat. If
possible, mount the actuator is mounted with the
cylinder pointing upwards.
❑ Place the actuator as straight as possible relative
to the valve. Lubricate the fastening bolts, install
the washers and tighten them and all screws.
❑ Adjust the open and closed positions of the ball
with the adjustment screws in the actuator. See
Figure 21. The exact open position is indicated
by the flow bore. The yellow arrow should indi-
cate the direction of the flow bore. Do not put
your fingers into the flow bore!
No adjustments are needed if the actuator has been
mounted on the same valve previously. You only need to
move the actuatortothe open position,turn it so that the
valve is also fully open and install the actuator.
❑ In cylinder applications, check the tightness of
the adjustment screw at the cylinder end. An O-
ring is used for sealing.
❑ Check the proper functioning of the actuator.
Check the direction of the ball flow bore and the
direction of the actuator with respect to the valve
(clockwise closed, counter-clockwise open) after
you have mounted the actuator. When the piston
is at the extreme end of the cylinder, the valve
should be in the closed position.
❑ Check that the yellow arrow indicates the direc-
tion of the flow bore. Correct the arrow direction
if necessary.
6.4 B1J actuator
Spring return actuators are used when the valve should
either open or close when the air supply is running out.
The B1J is used for the function ’spring closes’, in
which the spring is on the side of the piston stem and
pushes the piston towards the outer end of the cylinder.
B1JA is used for the function ’spring opens’, in which
the spring is between the piston and the cylinder end
on the other side than the piston rod.
Install spring return actuators in the same way as B1C
actuators. However the following should be taken into
account.
6.4.1 B1J type
Install the actuator so that the piston is at the outermost
end of the cylinder. The cylinder should be unpressu-
rized and supplied with air. The valve should be in the
closed position.
6.4.2 B1JA type
Install the actuator so that the piston is at the side of the
housing. The cylinder should be unpressurized and
supplied with air. The valve should be in the open posi-
tion.
Otherwise the instructions for B1C apply (Section 6.3).
6.5 Mounting actuators of other
manufacturers
Actuators of other manufacturers can only be installed
if they have an ISO 5211 actuator connection.
CAUTION:
Beware the cutting movement of the ball!
NOTE:
Metso only accepts responsibility for the actuators of
other manufacturers which it has installed.
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