Service life of actuators
The actuator intended for shut-off valves must be able to perform at least 10,000 operating cycles
(C - O - C).
The actuator intended for regulating purposes must be able to perform at least 1 million cycles with operation time
(during
which the output shaft is moving)
at least 250 hours. Service life in operating hours
(h)
depends on load and number
of switching. Not always, high frequency of switching influences positively accuracy of regulation. For attaining the longest
possible faultless period and service life, frequency of switching is recommended to be set to the lowest number of switching
necessary for the given process. Orientation data of service life derived from the set regulation parameters are shown in
the following table.
Service life of actuators for 1 million starts
Service life [h]
830
1 000
2 000
4 000
Number of starts [1/h]
Max. number of starts 1200
1 000
500
250
4. TECHNICAL DATA
Supply voltage
Supply voltages of the actuators are shown in Table 1.
1 x 230 V, +10 %, -15 %, 50 Hz ±2 %
3 x 230/400 V, +10 %, -15 %, 50 Hz ±2 %
(or as shown on the motor rating plate)
Other supply voltage for electric actuators should be discussed with the manufacturer.
Protective enclosure
Protective enclosure of actuators
MODACT MOK
IP 67 according to ČSN EN 60529.
Noise
Level of acoustic pressure A
max. 85 dB
(A)
Level of acoustic output A
max. 95 dB
(A)
Tripping torque
At the factory, the tripping torque has been adjusted as shown in Table 1, according to the customer’s requirements.
If no tripping torque adjustment has been specified by the customer the maximum tripping torque is adjusted.
Self-locking
The actuators are self-locking. Self-locking facility of the actuators is provided by a mechanical or electromagnetic
brake of the electric motor.
Sense of rotation
When looking at the output shaft in the direction towards the control box, the CLOSE direction of rotation is identical
with the clockwise sense.
Working stroke
The rated working travel of the actuator is 90°.
Manual control
Manual control is performed directly by a handwheel
(without clutch).
It can be used even when the electric motor
is running
(the resulting motion of the output shaft is determined by the function of the differential gear).
When the
5
Course of working cycle
Run time N
Idle time R
Cycle time
Mz starting torque
≥
1,3 . Mv
Mstř mean value of loading torque
Mv maximum value of tripping torque
Summary of Contents for MODACT MOK 1000
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