GB-4
D
GB
F
NL
I
E
Tightness test
WARNING
– An additional tightness test must be carried
out on the JSAV at all joints which have been
opened for maintenance work or replacement
of spare parts.
▷
▷
Ensure that the valve seat of the JSAV is open,
see [Resetting – p. 5].
1
Block the pipeline at the inlet and outlet.
▷
▷
Note max. test pressure.
JSAV inlet and outlet: max. 6 bar (87 psig),
impulse line: max. 750 mbar (10.9 psig).
2
Slowly apply test pressure.
JSAV 25 – 40
N
2
= max. 6 bar
N
2
= max. 750 mbar
3
4
JSAV 50 – 100
N
2
= max. 6 bar
N
2
= max. 750 mbar
3
4
Checking the function
Checking the switching pressure p
so
The JSAV is checked for the required switching pres-
sure p
so
.
1
Vent the system.
▷
▷
Ensure that the valve seat of the JSAV is open,
see [Resetting – p. 5].
▷
▷
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
a
of the regulator.
Increase the outlet pressure p
a
on the regula-
tor until the required switching pressure p
so
is
reached.
0
p
so
p
a
▷
▷
The JSAV closes at the set switching pressure p
so
.
klack
4
5
▷
▷
The JSAV has closed successfully: to restart the
system, the JSAV must be opened again, see
[Resetting – p. 5].
▷
▷
The JSAV does not close at the required switching
pressure p
so
and must be readjusted, see [Setting
the switching pressure pso – p. 5].
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.
The outlet pressure p
a
must not rise.
