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Electric actuator

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article image Rotork’s IQT electric acuator.

ROTORK has released the IQT electric actuator. It offers the advantages of intelligent, non-intrusive control technologies to the compact, direct drive actuation of quarter-turn valves.

Features include permanent environmental double-sealing, infra-red non-intrusive commissioning and communication, an on-board data logger, rationalised system on a chip electronics, and control and indication flexibility. The IQT incorporates these features in a compact, dedicated quarter-turn mechanical package. It is designed for the efficient, direct drive operation of valves requiring torques up to 2000Nm.

Advanced IQT motor technology operates from three phase, single phase, or dc electrical supplies. The motor always runs in the correct direction, irrespective of supply type and connection. In addition, the output speed can be non-intrusively adjusted over a 4:1 range without affecting the output torque.

The IQT's infra-red control interface is identical to the IQ multi-turn actuator. It uses the same hand-held setting tool to commission the actuator. Menus are displayed on the actuator's help screens. Commissioning is possible with or without mains power connected.

Dedicated Rotork IQ-Insight PC software uses the same link to enable actuator interrogation, analysis, and re-programming. This can be accomplished in the field by direct connection to a laptop, or by using a PDA running IQ Pocket-Insight to upload from the actuator and later download to a PC. The actuator's integral data logger stores operational data in historical order, including valve torque profiles that can be used for predictive valve maintenance.

All IQT actuators incorporate a double-sealed, permanently watertight enclosure conforming to IP68 (NEMA 4, 4X and 6). Hazardous area actuators are fully approved to the latest ATEX standards. Valve drive couplings comply to either ISO 5211 or MSS SP-101. Connectivity options include Foundation Fieldbus, Profibus, and DeviceNet open systems as well as Rotork's own dedicated Pakscan system and In-Vision PC based SCADA software.

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