Electric lock device

Askalon Fail Safe Electric Lock‐in‐last position unit

Pneumatic actuators can have three fail positions if air supply fails. Positions are fail close, fail stay or fail open. For spring return diaphragm actuators fail close and open are spring forced. Fail lock is performed by switch valve Fisher™ 167DA. Double action piston actuators have fail positions using Fisher™ 377 Trip Valve relay. Fail close and open must have air bottle.
Askalon has developed an electric fail stay unit that can be used both for diaphragm and piston actuators. Fail stay kit uses a signal trip relay and a solenoid valve. Locking time is about same as positioner dead band time. Max. ambient temperature 60°C.

Askalon electric lock device

Any questions?

Per Nordquist
Process Engineer, Engineering dept.
Phone. +46 54-57 92 38


Sören Kindlund
Engineering Manager
Phone. +46 54-57 92 18


Anders Praem
Inside Sales Engineer
Phone. +45 2137 7759


Frank Kirk Hansen
Area Account Manager West
Phone. +45 4053 6511


Kenn Gerwien
Area Account Manager East
Phone. +45 2346 5513


Morten Noppenau
Country Manager Askalon Denmark
Phone. +45 2121 3491


Peder Hvidberg
Area Account Manager West
Phone. +45 2178 5053


Slawka Pedersen
Inside Sales Manager
Phone. +45 2137 7702


Risto Wallin
Country Manager Askalon Finland, Key Account Manager Nuclear
Phone. +358 207 416 209
Mob. +358 400 448 248