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5.2.2 Butterfly valve
If the actuator is already installed to the valve, you can skip the points 1-5
NOTE:
If working in potentially explosive atmosphere all related safety and work instructions
must be followed.
Any tools or working methods generating sparks or extensive heat are not allowed
without written permission from responsible personnel.
Please check the actuator’s position before mounting it on the valve.
Please also check that the top flange and the valve stem are perpendicular to each other
and that there are no impurities between the actuator and the valve. Impurities or wrong
position between the top flange and valve stem might damage the actuator.
Installing the actuator
Part numbers refer to the figure 4
1.
Vexve butterfly valves are delivered from the factory in the close position. If the valve has been
operated so that it is in some other position, turn the valve to the close position.
2.
Check that the valve stem (4) is intact and clean. Check also that the key (5) of the valve stem is
properly in its groove
3.
Turn the actuator (1) to the close position
4.
Install the actuator on the valve. Note that the actuator is equipped with one key way so it is not
possible to change its installation position on the valve. The key way of the actuator must fit the
stem easily and you must not force it in its place
5.
Grease the attachment screws (2) of the actuator. Put all the washers (3) and the attachment
screws (2) first loosely in their places and finally tighten them up
Angle adjustment
NOTE:
Adjust the angle so that the disc doesn’t exceed its correct CLOSE position. If the disc
turns over the correct CLOSE position, it will damage the disc seal.
Part numbers refer to the figure 5
6.
Tighten the fastening screws (1). Adjust the correct CLOSE position by loosen the other and
tightening the other angle adjustment screw (2). Tighten the fastening screws (1)
7.
Turn the valve slightly towards the open position and then back to the close position against the
limit. Be sure not to turn the disc too much towards the CLOSE position, it will damage the disc
seal. Check if the CLOSE position is correct. If it is not correct, repeat the steps 6 and 7
8.
Check that the valve opens and closes correctly
