GB-3
D
GB
F
NL
I
E
▷
Installation position: black solenoid actuator in
the vertical upright position or tilted up to the
horizontal, not upside down.
▷
The housing must not be in contact with masonry.
Minimum clearance 20 mm (0.78").
▷
Ensure that there is sufficient space for installa-
tion, adjustment and maintenance work. Mini-
mum clearance of 50 cm (19.7") above the black
solenoid actuator.
▷
The inlet pressure p
u
and the outlet pressure p
d
can be measured using the pressure test points
on both sides.
p
d
p
u
Strainer
▷
A strainer must be fitted in the unit on the inlet
side. If two or more gas solenoid valves are in-
stalled in line, then a strainer only needs to be
fitted on the inlet side of the first valve.
Differential pressure orifice
▷
If pressure regulator VAD/VAG/VAV 1 is retrofitted
upstream of gas solenoid valve VAS 1, a DN 25
differential pressure orifice with outlet opening
d = 30 mm (1.18") must be inserted at the outlet
of the pressure regulator.
In the case of pressure regulator VAx 115 or
VAx 120, the DN 25 differential pressure orifice
must be ordered separately and retrofitted, Order
No. 74922240.
▷
The retaining frame must be fitted to secure the
differential pressure orifice at the outlet of the
regulator.
Retaining frame
▷
If two controls (regulators or valves) are as-
sembled, a retaining frame with double block
seal must be fitted, see accessories, seal set
for sizes 1 – 3.
▷
The seals in some gas compression fittings
are approved for temperatures of up to 70°C
(158°F). This temperature limit will not be ex-
ceeded if the flow through the pipe is at least
1 m
3
/h (35.31 SCFH) of gas and the maximum
ambient temperature is 50°C (122°F).
VAS with flanges
1
Note direction of flow.
2
3
VAS without flanges
1
Note direction of flow.
2
3
4
5
6
7
▷
O-ring and strainer (Fig.
4
) must be fitted.
2
3
4
5
6
7