There are two types of fail safe electric actuators.
Fail safe electric actuators.
Or the actuator can be set to fail closed where the actuator moves the valve to the closed position commonly referred to as an emergency shut off valve esv.
Corrosion resistant housing and enclosure type 4 4x 6 ip65.
There are 2 basic ways of achieving fail safe functionality.
Biffi fail safe electric actuators model efs2000v4 instruction and operating manual 2 device description 2 1 general the efs2000v4 electric fail safe is an electric quarter turn spring return actuator which has the purpose to move the valve in a fail safe state fail open or fail close when the system is de energized.
The battery recharges automatically when re energized.
When power is supplied the spring mechanism is compressed to store energy for movement.
Failsafe electric actuators for all quarter turn applications spring return fq range actuators ensure automatic opening or closing even without any power supply.
The robust and compact mechanical spring return design can be triggered to fail safe action either on loss of power or signal.
Sun yeh s series spring return electric valve actuators and tunnel damper valve actuator utilizes spring driven pinion and rack mechanism to provide torque ranges from 50n m to 260n m mechanical fail safe quarter turn electric actuators.
Spring return electric actuators and battery back up bbu actuators.
Once the power is lost or removed the controlled.
With their new fqm fail safe unit auma offer innovative and safe actuator solutions for automatic operation of valves in case of emergencies making use of stored mechanical energy.
The design has the ability to independently adjust motor speed and fail safe shutdown time.
A non intrusive intelligent fail safe quarter turn actuator for on off and modulation control in fail safe applications.
Rts fail safe electric actuators with true mechanical spring return for fail safe positioning are designed and field proven for reliable shutdowns on loss of power or signal.
The actuator is configurable to either fail close or fail open on loss of power supply.
Do rotork electric actuators have fail safe functionality.
Torques up to 2640 in lbs.
A fail safe electric actuator has a way of driving the actuator to the desired fail safe position when external power is unavailable.
Battery backup fail safe electric actuators for emergency shutdown applications.
Types of fail safe electric actuators.
1 stored electrical energy that can be used in place of the external power to power the motor.
Our cva cma products and waterproof iqt model through additional battery pack can all provide fail to position functionality.
