GB-7
D
GB
F
NL
I
E
5
6
14
11
15
13
4
3
8
12
7
9
10
10
Im Ventil-
teller zuerst
die Scheibe,
dann den
O-Ring
einsetzen.
5
6
14
11
15
13
4
3
8
12
7
9
10
10
Im Ventil-
teller zuerst
die Scheibe,
dann den
O-Ring
einsetzen.
▷
Ensure that the O-ring is fitted in the new measur-
ing unit, see Figure
.
5
6
14
11
15
13
4
3
8
12
7
9
10
10
First insert
the washer
into the valve
disc, and then
the O-ring.
▷
Replace the O-rings on the housing and the
valve seat.
19
24
17
16
18
25
20
21
22
23
Follow the reverse procedure when reassembling
using the O-rings from the seal set.
We also recommend replacing the sealing rings
on the pressure test points.
4
Connect the impulse line.
5
Check tightness and function, see page 3
(Tightness test) and page 4 (Checking the
function).
Maintenance
In order to ensure smooth operation:
Check the function and tightness of the JSAV every
year, or every six months if operated with biologically
produced methane, see page 4 (Checking the
function) and page 3 (Tightness test).
▷
In the case of malfunctioning, check the
measuring unit and valve disc and replace if
necessary.
Selecting spare parts:
see free PartDetective DVD:
Replacing spare parts:
see page 5 (Replacing the measuring unit),
see page 6 (Replacing the valve disc).
▷
After carrying out maintenance work or replacing
spare parts, check for tightness and function,
see page 3 (Tightness test) and page 4
(Checking the function).
Technical data
Gas type: natural gas, town gas, LPG (gaseous),
biologically produced methane (max. 0.02 %-by-
vol. H
2
S) or air.
The gas must be dry in all temperature conditions
and must not contain condensate.
Max. inlet pressure p
u
4 bar (58 psig).
Max. test pressure for testing the JSAV:
temporarily < 15 min. 6 bar (87 psig).
Max. test pressure for testing the impulse line:
temporarily < 15 min. 750 bar (10.8 psig).
Trip pressures pre-set at the factory to:
p
do
: 120 mbar,
p
du
: 10 mbar.
Trip pressure ranges, see page 4 (Replacing
Accuracy group: AG 10.
Ambient temperature:
-15 to +60°C (5 to 140°F).
Connection for housing:
JSAV..R: Rp internal thread to ISO 7-1,
JSAV..N: NPT internal thread,
JSAV..F: PN 16 flange to ISO 7005.
Connection for impulse line:
DN 8 (NPT
1
/
8
).
Housing: AlSi,
diaphragm: NBR,
valve seat: aluminium,
valve stem: stainless steel,
valve disc: steel with vulcanized NBR seal.
