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Failsafe
   

FM System or E71 ?

Definition of the fail-safe function

Failsafe System E 71

TA FM System

The FM System should not be used for valves requiring automation with multi-turn actuators – the Failsafe System E71 should be used instead.

The Failsafe System E71 should not be used for valves requiring faster activation of the fail-safe mode than the normal motor speed would allow.  The FM System should be used instead.

The closing time for the FM System is typically less than 1 second but can be extended if pressure shocks need to be avoided.  

The price of the patented FM System is considerably higher than that of the E71. 

Application Area

E71

FM System

Ball Valve

yes

yes

Butterfly Valves

yes

yes

Poppet valves

yes

no

Gate Valves

yes

+/-

Control Valves

yes

+/-

Explosion Protection

On Request

yes

Closing Time

= Actuator 

< 1 Sek.

Manual override for Emergencies

yes

yes

Price Level

$

$$$

Installation

Simple

Qualified