SR-Series
Electric Actuators

The SR range of multiturn actuators is based on four sizes, designed for easy adaption to meet specific customers requirements and ease of use.

Above 369 LB-FT, SE type actuators complete the SR range.

Up to 44 LBFT, the SRA6 actuator completes the SR range.  Like these, it is equipped with a declutching handwheel and a high level of weatherproofness and quality.  It torque limit system uses a planetary gear like our SD range
ST RANGE
Intelli +

A truly INTELLIGENT actuator system including:

  • BI-DIRECTIONAL communication for status reporting, commissioning and controls without any need t o open the actuator
  • Multilingual digital display taht will guide you through all steps
  • PC based software for field commissioning and valve and actuator diagnostics
  • Fully programmable microprocessor based logic for:
    - valve and actuator data recording
    - position and torque processing modes
    - fault treatment with different fault
      tolerance levels available.
  • Totally immune to power interruption without any DC or battery back-up
  • Taking full advantage of the ST range reliable sensors
  • Fully BUS compatible
QUARTER-TURN
ELECTRIC ACTUATOR
TYPE AT

DESCRIPTION:
The AT range offers a broad selection of heavy duty compact quarter turn actuators designed to operate all kinds of ball and butterfly valves, as well as large industrial dampers, maintenance free for many years:

Oversized worm and segment gearing (totally self-locking), easy to adjust, precise and vibration proof, mechanical travel and torque limiting systems, Heavy duty, high torque motors available in a wide range of AC and DC voltages that are thermally protected by sensors imbedded in the motor windings.  Easy to handwheel, highly visible position indicator, auxilliary dry switches, anti-condensation compartment heater, ISO flange and removable socket permits direct or indirect mounting on most types of quarter-turn valves and dampers.

 

SD-Series

Due to advanced technical developments, these actuators offer to their users numerous advantages:

  • Excellent price-performance ratio.
  • Highly sensitive and accurate torque limiting, thanks to a unique torque measurement device: a planetary gear system acting as first stage reduction provides a dynamometric balance allowing full power starts in either direction from any point of travel with complete safety.
  • Easy to set travel limit system allows precise, continuous adjustment of all switches at any point of valve travel independently of each other.
  • Lightweight construction and compact design minimize structural support and offer a high output relative to size.
"THE" FAIL SAFE ELECTRIC ACTUATOR

For all quarter turn applications, Spring Return FQ range actuators guarantee the return to a safe position even without any power supply.

APPLICATION FIELDS
They include:

  • All those where the loss of power supply necessitates automatically to put the driven device in a safe position.
  • All those where the risks are such, that driving the device to its safe position must be possible at any time even in the absence of power supply.

For example : Storage and distribution of gas and dangerous liquids, fire protection systems, chemical installation safety, climate control and ventilation of hazardous areas (protection of the environment).
IMPORTANT FUNCTIONS
When energized (after electrical wiring) the actuator operates the valve normally and at the same time compresses the spring which is held in the loaded position by the solenoid brake.  In case of solenoid de-energizing, the spring will drive the actuator and valve to the safe position either open or closed.  The associated dashpot controls the speed of the spring action and permits a secure and shock-free operation of the valve.  When the power supply is restored (no resetting of the spring is required), the actuator is available for normal operation.
In standard, the spring operates clockwise when viewed from the top.  The electric part is equipped with an asynchronous 3 phase motor of squirrel cage type.  Other versions are possible : single phase and direct current supply.

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