Rotork IQTM Part-turn Modulating Electric Actuator

Part-turn Modulating Electric Actuator

Standard specifications 5
Design specification
5.1
Duty rating
Duty classification*
Actuator type
Rating
On-Off & Inching IQ

Nominal 60 starts per hour at a rate not exceeding 600 starts per hour.
15 minutes rated based on a nominal torque of 33% of rated
On-Off & Inching IQT

Nominal 60 starts at a rate not exceeding 600 starts per hour.
15 minutes rated based on a nominal torque of 75% of rated
Modulating IQM

Nominal 1,200 starts per hour, 50% duty cycle based on a modulating torque of 50% of rated torque
Modulating IQTM

Nominal 1,200 starts per hour, 50% duty cycled based on a modulating torque of 50% of rated torque
5.2
Design life
Duty classification*
Actuator type
Size
On-Off & Inching IQ 10-35

Minimum design life rating Torque and thrust test: 10,000 cycles (500,000
output turns) seating at rated torque, 33% rated torque through stroke

40-95 Torque and thrust test: 5,000 cycles (250,000
output turns) seating at rated torque, 33%
rated torque through stroke
Modulating IQM 12-35 1,800,000 starts at load of 50% rated torque
(1 start constitutes at least 1° movement) On-Off & Inching IQT All sizes

Torque test: 25,000 cycles seating at rated torque, 70% rated torque through stroke
Modulating IQTM All sizes

1,800,000 starts at load of 70% rated torque (1 start constitutes at least 1° movement)
Design life is a function of actuator torque and speed. Values quoted are the minimum requirements; for most sizes/speeds life will be
extended above the values quoted. Actuators are stalled against a solid object 25 times to prove durability.
Contact Rotork for more information
5.3
Vibration, shock and noise
Standard IQ and IQT Pro Range actuators are suitable for applications where vibration and shock severity does not exceed the following:
Type
Level
Plant induced vibration
1g rms total for all vibration within the frequency range of 10 to 1000 Hz
Shock
5g peak acceleration
Seismic
2g acceleration over a frequency range of 1 to 50 Hz if it is to operate during and after the event
Emitted noise
Independent tests have shown that at 1m generated noise does not exceed 61 db(A)
Levels quoted are those present at the actuator mounting interface. It should be noted that the effects of vibration are cumulative and
therefore an actuator subjected to significant levels may have a reduced lifespan. Where excessive plant induced vibration is anticipated,
mounting the actuator remote from the valve and driving via extension shafting (incorporating vibration absorbing couplings) may provide a
satisfactory solution.
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