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Biffi electric quarter turn actuator EFS 2000

Product Details
Biffi electric quarter turn actuator EFS 2000
The EFS is an electric quarter turn spring return actuator which has the purpose to close or open a valve in emergency conditions, when an ESD alarm signal occurs or when motor power supply fails.The EFS actuator consists of four main parts:a spring return mechanism, which move the valve in the foreseen fail-safe condition when requested by an ESD signal or by a power failure. a quarter turn electric actuator which operates the valve during normal working conditions. an electro-magnetic clutch which hold in position an epicyclical gearing during the normal operation and release it in case of fail-safe function.an oil damper, which is necessary to adjust the fail-safe speed and to manually operate the actuator by means of an hand-pump in case of power failure.
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