VAA · Edition 05.22
EN-10
11.2 Variable bypass VAA /B
For retrofitting on the VAA, the bypass can be supplied
as an additional item.
The bypass can be attached at the right- and/or left-
hand side of the flow body.
Order No.: 74926325
1
Shut off the air supply.
➔
Use the enclosed self-tapping screws and O-rings
for installation.
2
3
4
5
6
12 teCHnICAL DAtA
12.1 Ambient conditions
Icing, condensation and dew in and on the unit are
not permitted.
Avoid direct sunlight or radiation from red-hot surfaces
on the unit. Note the maximum medium and ambient
temperatures!
Avoid corrosive influences, e.g. salty ambient air or SO
2
.
The unit may only be stored/installed in enclosed
rooms/buildings.
The unit is suitable for a maximum installation height
of 2000 m AMSL.
Ambient temperature: -20 to +60°C (-4 to +140°F),
no condensation permitted.
Long-term use in the upper ambient temperature
range accelerates the ageing of the elastomer ma-
terials and reduces the service life (please contact
manufacturer).
Storage temperature = transport temperature: -20
to +40°C (-4 to +104°F).
Enclosure: IP 65.
This unit is not suitable for cleaning with a high-pressure
cleaner and/or cleaning products.
12.2 Mechanical data
Gas types: clean air. The air must be clean and dry
in all temperature conditions and must not contain
condensate.
Medium temperature = ambient temperature.
CE approved, max. inlet pressure p
u
: 500 mbar
(7.25 psig).
Flow adjustment limits the maximum flow rate to be-
tween approx. 20 and 100%.
Adjustment of the start rate: 0 to approx. 70%.
Opening times:
VAA../N quick opening: < 1 s;
VAA../L slow opening: up to max. 10 s,
VAA../R slow opening: 4 s.
Closing time:
VAA../N, VAA../L quick closing: < 1 s,
VAA../R slow closing: 4 s.
Switching frequency:
VAA../N: any, max. 30 x per minute.
VAA../L: max. 2 x per minute.
VAA../R: max. 6 x per minute.
Valve housing: aluminium,
valve seal: EPDM.
Connection flanges:
up to size 3: Rp internal thread to ISO 7-1, NPT to
ANSI/ASME;
size 2 and higher: with PN 16 ISO flange (pursuant
to ISO 7005) .
Cable gland: M20 x 1.5.
Electrical connection: cable with max. 2.5 mm
2
(AWG 12) or plug with socket to EN 175301-803.
Duty cycle: 100%.
Power factor of the solenoid coil: cos φ = 0.9.
12.2.1 tightening torque
Recommended tightening torques for the connec-
tion parts:
Connection parts
tightening
torque
[ncm]
VAx 1: M5
500 ± 50
VAx 2: M6
800 ± 50
VAx 3: M8
1400 ± 100
12.3 electrical data
Mains voltage:
230 V AC, +10/-15%, 50/60 Hz;
200 V AC, +10/-15%, 50/60 Hz;
120 V AC, +10/-15%, 50/60 Hz;
100 V AC, +10/-15%, 50/60 Hz;
24 V DC, ±20%.