GB-3
D
GB
F
NL
I
E
Installing the impulse line
VGBF 40 – 150..05 for 500 mbar
▷
▷
No external impulse line required. VGBF..05 fea-
tures an internal feedback function.
VGBF 40 – 100..40 for 4 bar
▷
▷
In order to avoid possible oscillations, a damp-
ing valve should be fitted. The damping valve is
secured to the spring dome with an adhesive
strip on delivery.
▷
▷
Impulse line: 12.5 × 1.5 mm.
VGBF 40 – 100
3
1
2
5
4
Push union
nut and
compression
fitting onto
the impulse
line.
VGBF 15 – 100..10 for 1 bar and
VGBF 15 – 100..40 for 4 bar
6
Install the impulse line and seal with an approved
sealing material.
VGBF 15 – 25R
Rp
1
/
4
5xDN
VGBF 40 – 150
5xDN
Rp
3
/
8
Tightness test
▷
▷
Also after maintenance.
1
Block the pipeline at the inlet and outlet.
2
Slowly apply inlet pressure p
e
.
(p
e
≤ 1.5 × p
e max.
, see type label)
Slowly apply outlet pressure p
a
.
(p
a
≤ 1.5 × p
a
, see type table)
CAUTION
First apply the inlet pressure p
e
– then the outlet
pressure p
a
.
The inlet pressure p
e
must always be equal to or
higher than the outlet pressure p
a
.
In the event of non-compliance with the sequence,
the compensation diaphragm will reverse.
1.
2.
p
e
p
a
2.
1.
p
e
p
a
5
4
7
6
9
8
11
10
12
Relieve the outlet pressure p
a
.
1
Relieve the inlet pressure p
e
.
