Installation, Operating & Maintenance Instructions
Series 651 DN 320-400 (I.D. 12“ - 16”), Logic
VAT Vakuumventile AG, CH-9469 Haag, Switzerland
Tel +41 81 771 61 61 Fax +41 81 771 48 30 [email protected] www.vatvalve.com
267736ED
2008-02-26
17/53
3.4 Behavior in case of power failure
Reaction of valve:
Valve position before
power failure:
Without Power Failure Option (PFO)
651 . . - . . G . - . . . .
651 . . - . . A . - . . . .
651 . . - . . T . - . . . .
651 . . - . . V . - . . . .
With Power Failure Option (PFO)
651 . . - . . H . - . . . .
651 . . - . . C . - . . . .
651 . . - . . U . - . . . .
651 . . - . . W
. - . . . .
Closed (isolated)
Valve remains closed.
Valve open or in any intermediate
position
Sealing ring moves down and blocks the
pendulum plate at the current position.
Valve will close or open depending
on valve configuration *).
Default is not defined.
Display indicates F.
*) Provided that battery pack of the VAT controller is charged. Charging time after power up is 2 minutes max..
All parameters are stored in a power fail save memory.
3.5 Display
information
There is a 4 digit display located on the panel.
It displays configuration, status and position
information. For details refer to following
tables.
Display
1 2 3 4