20 …60
MC • Edition 2022.08 • No
. 278 349 R
ev
. -0
21 … 60
11.2 SAV setting
Switch-off setting in case of overpressure p
do
1. Remove the protective cap A.
2. Turn the external adjusting screw B using a socket
wrench SW 22 mm.
3. Turning clockwise: increase (+) in the upper shut down
pressure p
do
.
4. Turning counter-clockwise: reduction (+) in the upper
shut down pressure p
do
.
5. After the setting: screw on the protective cap A again.
Triggering setting in case of underpressure p
du
1. Remove the protective cap A.
2. Turn the internal adjusting screw C using a socket
wrench SW 17 mm.
3. Turning clockwise: increase (+) in the lower shut down
pressure p
do
.
4. Turning counter-clockwise: reduction (+) in the lower
shut down pressure p
do
.
5. After the setting: screw on the protective cap A again.
Attention: The setting for lower triggering affects the
set value for upper triggering. Please set the vacuum
triggering, first.
A mutual influence of the pressure regulator and the safety shutoff valve must be excluded.
Calculation of the recommended set values according
to the outlet pressure p
d
of the regulator
•
The SAV must lock as soon as it reaches the 1.1 times
max. operating pressure according to the system speci
-
fications.
•
The set values of the SAV must be defined taking into
account the set values and tolerances
of the pressure regulator.
•
The tolerances and set values of additional safety de
-
vices must also be considered when setting of the SAV.
•
In case of a fault or regular shut-down of the down
-
stream shutoff valve the SAV may not
be actuated. The upper shut down pressure should be
determined to avoid nuisance shut down (e.g. shut
down of downstream equipment)
p
d
≤ 100 mbar (40 "W.C.)
p
do
= p
d
+ 100 mbar (40 "W.C.)
100 mbar (40 “W.C.) < p
d
≤ 300 mbar (120 "W.C.)
p
do
> p
d
+ 150 mbar (60 "W.C.)
p
d
> 300 mbar (120 "W.C.)
p
do
> p
d
x 1.5
A
B
C
F
E
G
D
