Catalogue Greatork Catalogue
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SMART VALVE AUTOMATI
Greatork^ mmm mmm O
Power supply
AVA/AVAT actuators are mainly powered by external Ac power supply manufacturer. Besides the above-mentioned syncrophase technology, a back-up battery is installed to keep the pulse data logged for at least 5 years in case no external electric supply available.
Over heating protection
Thermo switches embedded in the motor
windings of actuators will disconnect the
relevant contacts, stop actuators, display
alarm signals once the winding
temperature is over +132°C.
Over current protection
Actuators will stop the motor automatically
in case of over current.
the reaction force of motor shaft's thrust transferred by pressure sensor, thus solves the problem of calculating the torque according to the changes of power frequency, voltage and temperature, as well as the problem of torque excursion because of technical efficiency changes of gears.
Safety priority
GREATORK gives first priority to safety, from its designing all through to the finished products
Double seal design
The worldwide advanced seal technology protects the internal components completely from outer environmental impact even when the terminal compartment cover is removed.
Thanks to the infrared setting tool and the non-intrusive magnet knob switches, the internal components will be underthe permanent protection once all wirings and settings are done
Standard features of GREATORK smart industrial valve actuator range
Position measurement
AVA/AVAT actuators' non-contact position
measurement system (Hall effect principle)
which transforms the rotation movement of
the center column accurately into
equivalent electrical signal, delivering
position limit code after comparing the
signal with the original settings in memory.
The setting range is from 2.5 circles to
100,000 circles, and the min perceptible
central shaft angle output is 7.5°. Torque measurement GREATORK adopt its own specially-designed torque measurement system to ensure the overload protection of actuators and indicate the torque variation. The precise torque value is decided by the electronic signal converted from
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