11
6 INSTALLING THE
ACTUATOR
6.1 General
Different Neles actuators can be mounted using suitable brackets
and couplings. The valve can be actuated by an M-handwheel
operator or B1-series actuators.
6.2 Installing the M-handwheel
operator
•
The mark at the end of the shaft indicates the direction of the ball
flow bore. Turn the valve to the closed position.
•
Lubricate the grooves of the actuator and the couplings. Place
the coupling on the shaft and lock it. Place the bracket on the
valve and turn the lubricated screws a few times.
•
Turn the actuator to the closed position and push it carefully onto
the valve shaft on which the coupling has been mounted. Please
note the marks on the handwheel and the coupling.
•
Lubricate the actuator screws. Tighten all screws.
•
Adjust the ball open and closed positions with the hexagon
screws located at the side of the housing (see Figure 17). The
stop-screw for the open position is nearest to the handwheel on
the side of the housing and the screw for the closed position is at
the opposite end. The turning directions for the handwheel are
marked on the wheel.
•
Check the handwheel by turning the valve to the extreme
positions. The yellow arrow should indicate the direction of the
ball flow bore.
6.3 Installing the B1C-series actuator
•
Turn the valve to the closed position and drive actuator piston to
the extreme outward position.
•
File off any burrs and clean the shaft bore.
•
The line at the end of the shaft indicates the direction of the ball
flow bore.
•
Lubricate the actuator shaft bore. Fasten the bracket loosely to
the valve.
•
Slip the actuator carefully onto the valve shaft. Avoid forcing it
since this may damage the ball and seats. We recommend
mounting the actuator so that the cylinder is pointing upwards.
•
Position the actuator parallel or vertical to the pipeline as
accurately as possible. Lubricate the actuator mounting screws
and then fasten all screws.
•
Adjust the ball open and closed positions by means of the
actuator stop screws located at both ends (see Fig 18). An
accurate open position can be seen in the body flow bore. Check
that the yellow arrow on the actuator indicates the ball flow
opening position.
Keep fingers out of the flow bore!
There is no need for stop screw adjustment if the actuator is re-
installed in the same valve. Drive actuator piston to the housing end
(open position). Turn the actuator by hand until the valve is in the
open position. Fasten the actuator in this position as explained
above.
•
Check the stop screw thread tightness. An O-ring is used for
sealing.
•
Check that the actuator is functioning correctly. Drive the actuator
piston to both cylinder ends and check the ball position and its
movement with respect to the actuator (close: clockwise; open:
counterclockwise). The valve should be closed when the piston is
in the extreme outward position.
•
If necessary, change the position of the actuator pointing cover to
correctly indicate the valve open/closed position.
6.4 Installing the B1J-series actuator
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 operation; the spring
pushes the piston towards the housing. Spring-return actuators are
installed in a manner similar to B1C-series actuators, taking into
account the following.
B1J type
•
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.
B1JA type
•
Install the actuator so that the piston is in the cylinder end
position at housing side. The cylinder must not be pressurized
and air supply connections must be open. The valve must be in
the
open
position.
The rest of the installation procedure is the same as in Section 6.3.
CAUTION:
Beware of ball cutting movement!
Fig. 20
Open and closed positions of the M actuator
stop-screw for
stop-screw for
OPEN position
CLOSED position
Fig. 21
Open and closed positions of the B1C/B1J actuator
stop-screw for CLOSED position
stop-screw for OPEN position
