GB-4
D
GB
F
NL
I
E
Checking the function
Checking the trip pressure p
do
The JSAV is checked for the required trip pressure p
do
.
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.
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
d
of the regulator.
Increase the outlet pressure p
d
on the regulator
until the required trip pressure p
do
is reached.
0
p
do
p
d
▷
The JSAV closes at the set trip pressure p
do
. The
red “SHUT” mark is visible.
klack
4
5
▷
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
do
and must be readjusted, see page
4 (Setting the trip pressure pdo).
Checking the tightness of the valve disc
▷
Ensure that the JSAV and outlet gas line are
closed.
Vent the system.
Slowly open the manual valve at the inlet.
The outlet pressure p
d
must not rise.
Setting the trip pressure p
do
Select the trip pressure p
do
according to the
outlet pressure p
d
of the pressure regulator.
20
0
40 60 80 100 140
180
220
260
300
340
50
100
150
200
250
300
350
400
450
500
pd [mbar]
p do
[mbar
]
VSBV
JSAV
Remove the screw plug.
▷
Set the trip pressure p
do
according to the dia-
gram.
+
–
3
5
4
▷
If the JSAV has tripped, i.e. the “SHUT” mark
is visible, reset it – see page 5 (Resetting).
6
Check the required trip pressure p
do
again, see
page 4 (Checking the function).
7
If the JSAV has been adjusted correctly, follow
the reverse procedure when reassembling.
Replacing the spring
▷
Various trip pressure ranges can be achieved by
using different springs on the JSAV.
Choose a spring according to the required trip
pressure range.
Spring table
Trip pressure p
do
Marking
Order No.
[mbar]
[psig]
35 – 70
0.51 – 1.02 light blue 0 308 906 3
60 – 170*
0.9 – 2.5
reddish
brown
0 308 906 4
120 – 220 1.74 – 3.2
crimson
0 308 906 5
190 – 400
2.8 – 5.8
orange/
yellow
0 308 906 6
300 – 550
4.35 – 8
orange/
green
0 308 906 7
* Standard spring