IQT - Part-turn Failsafe

The IQT Failsafe actuator provides valve failsafe operation by utilising power from a battery source during AC supply mains failure. Under normal supply conditions the actuator operates from the site AC electrical supply. On loss of this supply the actuator automatically switches over to receive power from a 24V DC supply allowing control of the valve to the mains failsafe position.

IQT Failsafe Type 1 - External Failsafe
Suitable for use in hazardous and nonhazardous locations, Type 1 includes connection for a customer supplied 24V DC supply in addition to the normal AC supply.

IQT Failsafe Type 2 - Battery Failsafe
Suitable for use in non-hazardous locations only, Type 2 includes a battery located in the actuator terminal cover, charged from an integral charging system when AC power is applied to the actuator.

IQT Failsafe offers the following powerful features:

  • Same performance as Standard IQT
  • Three Phase, Single Phase and DC power supplies (type 1 only)
  • Modulating Duty Option
  • Full-turn and multiport option

See IQ3 Range Literature page for further details.


IQT3 Failsafe Part-turn Actuator