Fail Safe Return 600Nm 45S IP68 ATEX CSA Explosion Proof Valve Actuator

The DCL-Ex explosion-proof electric actuator range offers an optional fail-safe module for hazardous-area valves requiring a defined response to external power loss. During normal operation, the internal circuit charges a supercapacitor or battery. When external power is unexpectedly disconnected, stored energy powers the motor to move the valve to a preset fully open or fully closed position, or retain its current position. Once external power returns, the actuator automatically exits fail-safe mode and resumes normal operation.

The fail-safe components are integrated within the actuator housing, supporting compact equipment layouts. The range allows mounting through 360° and provides ISO 5211 mounting interfaces. Standard output torque ranges from 50 to 3000 Nm, with an IP68 enclosure and a stated ambient-temperature range of -25°C to +55°C. The literature specifies stored energy for at least four full-stroke operations; available movements under actual valve load and fail-safe operating time should be confirmed for the selected configuration.

The product documentation includes ATEX, IECEx and CSA certification information, with markings such as Ex db h IIC T4 Gb and Class I, Division 1, Groups C and D, T5/T6. Selection should verify the certificate scope, gas group, temperature code and installation conditions for the specific model, together with valve torque, the required power-loss position and control mode.

1. Quarter turn operation with mechanical limits
2. Heavy duty motor with thermal overload protection
3. Rugged IP68/NEMA 4X aluminum alloy housing
4. C3 level corrosion resistance with powder coated, 1000 hours salt spray
5. Explosion proof grade ExdIICT4 for Zone system and Group C, D T4 for Division system
6. Over torque protection is available
7. Self-locking high strength gear train to keep last known position
8. Standard ISO5211 direct installation
9. Manual override with Allen wrench or handwheel
10. CSA certification in process per UL and CSA standard/CE marked/ATEX