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.

Fail safe electric actuators.

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. A non intrusive intelligent fail safe quarter turn actuator for on off and modulation control in fail safe applications. Corrosion resistant housing and enclosure type 4 4x 6 ip65. The battery recharges automatically when re energized.

The robust and compact mechanical spring return design can be triggered to fail safe action either on loss of power or signal. 1 stored electrical energy that can be used in place of the external power to power the motor. There are two types of fail safe electric actuators. 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.

Failsafe electric actuators for all quarter turn applications spring return fq range actuators ensure automatic opening or closing even without any power supply. When power is supplied the spring mechanism is compressed to store energy for movement. Do rotork electric actuators have fail safe functionality. A fail safe electric actuator has a way of driving the actuator to the desired fail safe position when external power is unavailable.

The design has the ability to independently adjust motor speed and fail safe shutdown time. When energized the actuator operates the valve normally and at the same time compresses the spring which is held in the loaded position by a solenoid brake. Types of fail safe electric actuators. 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.

Our exmax product provides a quarter turn spring return failsafe solution. The actuator is configurable to either fail close or fail open on loss of power supply. Constant torque curve with torques from 150 nm to 1 200 nm the spring is not operated during standard operation. 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.

Our cva cma products and waterproof iqt model through additional battery pack can all provide fail to position functionality. Once the power is lost or removed the controlled. There are 2 basic ways of achieving fail safe functionality.