VAT Series 651 Installation, Operating, & Maintenance Instructions page 43

36. Turn on power of controller.
Note: valve moves to close position.
37. Open valve and install sealing ring
and pendulum plate in reverse order
as they had been disassembled
(steps 9 to 3).
If actuator was replaced, proceed with
point 38, otherwise go to point 40.
38. Close valve and check if pendulum
plate is in center of flange. Check
can be done either visual or by
measurement.
When the valve is mounted to a tool,
the bonnet has to be removed and
the center position can be measured
by a depth gauge (see picture).
If the centering (or distance) is not
correct, proceed with point 39.
39. f necessary adjust pendulum plate:
a. Move pendulum plate a little towards
open (e.g. position 1% of full stroke)
b. Use adjustment screw at flange side
of actuator (1 turn clockwise adjusts
pendulum plate by about 3mm
towards open).
c. Restart valve in menu
'System/Recovery'
d. Check pendulum plate position
according point 38 38and redo
adjustment procedure if necessary.
40. Clean valve bonnet sealing surface
and o-ring
• Mount valve bonnet, see step 2.
• Tightening torques for bonnet
screws, see in table to the right.
VAT Vakuumventile AG, CH-9469 Haag, Switzerland
Tel +41 81 771 61 61 Fax +41 81 771 48 30 CH@vatvalve.com www.vatvalve.com
Installation, Operating & Maintenance Instructions
Series 651 DN 320-400 (I.D. 12" - 16"), Logic
D e s c r i p t i o n
D
Adjusting screw mounted either in actuator
position «B1 standard» or «B2 option»
Max. torque 16 Nm
Required tool
open end wrench
13mm
Distance D [mm]
between bonnet
flange surface
DN
and pendulum
plate
320 60.5 ±0.5
350 59.0 ±0.5
400 62.0 ±0.5
Allen wrench
3mm
Allen wrench
8mm
267736ED
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2008-02-26