2
signal. It is composed of middle transmission mechanism, absolute encoder, integrated circuit board, and etc... It
records and processes the rotation turns of output shaft to have valve controlled. Use selector switch and remote
setter to set up actuator after it has been connected with valve, so that a precise limit position and required valve
position feedback are acquired.
3.8 Position indicator: it is used to show valve position, torque and other functions.
3.9 Local selector switch: it is used to set up and operate electric actuator on site.
3.10 Wiring terminal case: it is used for wiring on site. Double-sealing structure is good for actuator’s outdoor
performance.
4. Connection with valve
Preparation before connection:
*Before connection, check if the type and size of the flange of valve and actuator are the same, so as to ensure
the two can connect correctly.
*For the actuator using stem nut, process internal thread of the stem nut to have it connected with valve correctly.
*Clean valve stem and apply grease.
*For rising stem valve, make sure the external part of the valve stem is shorter than the height of the stem cover
of actuator.
*Be care of the mounting position of the actuator against pipe to have enough dismantle space or adjusting space
for actuator.
*There’s no special requirement on actuator’s working position, but motor’s axial level and be vertical to the
selector switch are preferred. This is good for product lubrication, maintenance and check up on site.
4.1 The connection between valve and actuator with stem nut
Put the processed the stem nut into output shaft, and using locking nut to axially fasten it. Sling actuator to make
the internal thread of stem nut to be aligned with valve stem. Manually operate actuator to make the valve open (the
standard rotation direction of stem thread is left, and the output shaft will rotate counterclockwise). Gradually pull
down actuator; as valve stem meshes with stem nut, actuator flange begins to touch valve’s connection surface.
Screw bolt into the flange thread hole and keep the bolt firmly.
To keep stem nut firmly setting in output shaft, user could use cutting tools to damage the meshing fringe
between the upper part of output shaft and locking nut.
Means of dismantling actuator from valve: sling the actuators first; loosen bolts between valve and actuator;
manually operate the actuator to close the valve and the actuator will automatically lift up. Pay attention to sling the
actuator to until to make it separate from valve stem. Make sure the lift is firmly balanced, especially when it is
used for the big-torque actuator.
4.2 Connection between Key/Jaw type actuator and valve
Sling actuator to make its shaft hole to be aligned with valve stem (or to make output shaft’s jaw to be aligned
with stem nut’s jaw); put down actuator and screw bolts into actuator and valve.
When to dismantle actuator, sling it properly first, and then loosen the fixing bolts.
Note: The ring on the actuator is only used to sling the actuator itself, instead of a complete
valve with actuator.
5. Lubrication
5.1 Special used grease has been applied into product before factory delivery. Check the grease at least once a year.
If there is no abnormal situation with it, continue to use.
5.2 If changing grease after maintenance, pay attention to its antioxidation, water resistance, heat-resistance,
corrosion resistance and mechanical stability etc... And also pay attention to the anticompression to ensure actuator
lubrication and high transmission efficiency. (Special-used grease is recommended.)
5.3 When grease is applied into product, do not bring in foreign matters. After grease is filled, it should keep the
filling part to be sealed properly.
5.4 When lubricant (thin oil) is adopted in the electric actuator for special use, the actuator is not filled with oil
