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?

Gert Andrée
Manager Engineering
Phone. +46 54-57 92 19

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

Sören Kindlund
Process Engineer, Engineering dept.
Phone. +46 54-57 92 18

Klaus Høi
Country Manager Askalon, Denmark
Phone. +45 7070 1275

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

Satu Mäkelä
Key Account Manager
Phone. +358 207 416 207
Mob. +358 50 385 1020