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Checking the function
Checking the trip pressure p
The JSAV is checked for the required trip pressure p
1 Vent the system.
▷ Ensure that the valve seat of the JSAV is open,
see page 5 (Resetting).
▷ Ensure that the breather screw plug is screwed in.
2 Close all manual valves at the inlet and outlet,
and in the relief line.
CAUTION
Please observe the following to ensure that the
regulator is not damaged during the function check:
–
Do not exceed the maximum outlet pressure p
of the regulator.
3 Increase the outlet pressure p
until the required trip pressure p
p
do
p
d
▷ The JSAV closes at the set trip pressure p
4
klack
▷ The JSAV has closed successfully: to restart the
system, the JSAV must be opened again, see
page 5 (Resetting).
▷ The JSAV does not close at the required trip
pressure p
and must be readjusted, see page
do
4 (Setting the trip pressure pdo).
Checking the tightness of the valve disc
▷ Ensure that the outlet is closed.
1 Vent the system.
2 Slowly open the manual valve at the inlet.
3 The outlet pressure p
do
do
on the regulator
d
is reached.
do
0
.
do
5
must not rise.
d
Setting the trip pressure p
1 Select the trip pressure p
outlet pressure p
.
500
450
400
350
300
250
200
150
100
50
0
20
40 60 80 100
d
2 Remove the breather screw plug.
3 Set the trip pressure p
4 Reset the JSAV, see page 5 (Resetting).
5 Check the required trip pressure p
page 4 (Checking the function).
6 Screw the breather screw plug back in.
Replacing the spring
▷ Various trip pressure ranges can be achieved by
using different springs on the JSAV.
1 Choose a spring according to the required trip
pressure range.
Trip pressure p
[mbar]
[psig]
35 – 70 0.51 – 1.02 light blue 0 308 906 3
60 – 170*
0.9 – 2.5
120 – 220 1.74 – 3.2
190 – 400 2.8 – 5.8
300 – 550
4.35 – 8
* Standard spring
2 Remove the breather screw plug.
3
5 Insert new spring.
6 Follow the reverse procedure when reassem-
bling.
7 Set the required trip pressure p
(Setting the trip pressure pdo).
GB-4
do
according to the
do
of the pressure regulator.
d
JSAV
VSBV
140
180
220
260
.
do
+
–
do
Spring table
do
Marking
Order No.
reddish
0 308 906 4
brown
crimson 0 308 906 5
orange/
0 308 906 6
yellow
orange/
0 308 906 7
green
4
, see page 4
do
300
340
p d [mbar]
again, see
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