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Installation, Operating & Maintenance Instructions
Series 612 DN 40-50 (I.D. 1.5“ - 2”), 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
289419EB
2011-12-12
47/60
Description
Required tool
6. Unfasten alternately the 2 mounting
screws little by little.
Note: If only one screw is fasten /
unfasten, the mechanical unit will be
damaged. Max. difference should be
less than 1 turn or 0.5 turn of the
screws.
Allen Wrench
3mm
Remove and cl
ea
n
mechani
cal
uni
t
7. Remove mechanical unit and clean
shaft.
S
eal
r
e
m
o
val
and
val
v
e
cl
eani
n
g
8. Remove o-rings.
9. Clean shaft feedthrough and valve
body.
Lubr
ic
ate and i
n
st
al
l
seal
s
10. Lubricate seal contact surface of
valve body with a slight film of
vacuum grease (0.025 ml).
11. Lubricate each o-ring with a slight
film of vacuum grease (0.0125 ml).