Installation and connection
20901118_EN-US_PC301x VARIO select Serie_V1.3_100720
35
4.4.4 Venting connection
DANGER
Risk of explosion by venting with air.
Depending on the application, venting can cause explo-
sive mixtures to form or other hazardous situations to
arise.
Ø
Never vent processes with air which could form an
explosive mixture.
Ø
In the case of flammable substances, use only inert
gas for venting, e.g., nitrogen
(max. 1.2 bar/900 Torr abs.).
If there is not direct venting connection on the vacuum pump,
pumping unit or controller, you can connect a separate venting
valve, e.g., to a
VACUU·SELECT
®
sensor
.
VACUU·SELECT
®
sensor with venting
valve
Venting connection (b) for a
VACUU·SE-
LECT
®
Sensor
is described below.
Alternatively you can use a larger valve, e.g., a
VB M-B
(#20674217), for faster venting.
Vent with ambient air
5
Position of venting
connection
For venting
(b)
with ambient air, nothing needs
to be connected to sensor
(a)
.
5 Only applicable to sensors with an integrated venting valve.
