12
Important advice:
If the MOA servomotors are to be used for control, it is necessary that in the end positions they are
tripped by positional terminal microswitches!
If a tight seal is required, e.g. in the
"closed"
position, it is possible to switch off by torque, but with the following
recommendation:
– regulation near the end of position
"CLOSED" (up to 10 %)
is undesirable
– for short valve strokes the torque blocking must be as short as possible. Therefore, for this purpose, it is better
to use
MOA actuators in the version 20 02x.xxxS1, where the blocking time between 1/4 and ½ of revolution
of the output shaft of the actuator from the change of the direction of rotation.
– If the valve operation does not require torque blocking, we recommend ordering and using
MOA actuators
in 52 02x.xxxxSM version. In this design the blocking of torque switches is excluded to both sides of rotation.
– The electric actuators can be supplied with a modified torque unit – without torque blocking to the closed side.
Current position transmitter CPT 1AAE – adjustment
First of all you must set the appropriate gear from the output shaft of the actuator to transmitter shaft according to
the required working stroke of the actuator shown in the following table on page 9. Configuration is performed using
the adjustable wheel K3 in the gearbox of the signal unit as per the paragraph b) on page 6. of the Installation Instructions.
Further, you must bring the necessary gear of the double wheel, affixed on the transmitter shaft, into meshing position.
The wheel with the smaller diameter is marked A, the larger wheel is marked B.
The adjustment is made by moving the spacers with two holes either under the transmitter bracket
(wheel A is engaged)
or above the transmitter bracket
(wheel B is engaged).
This is done at the position where the transmitter support is the
most distanced from the gearbox. Then the bolts securing the transmitter bracket are slightly tightened so as to be able to
shift the transmitter bracket to a position where the A or B wheel are in engagement with the drive wheel. In this position,
recheck the engagement of the wheels and possibly using the spacers on the shaft adjust the height of the wheelset
Fig. 8a –
Position indicator
Description:
43 – Indicator shaft
44 – Bottom “closing” indicator
45 – Top “opening” indicator
46 – Driving rubber collar
47 – Locking screw
48 – Fixing screw
49 – Top cam with opening
46
43
48
47
44
45
49
46
47
45
44
43
48
49
