VEGA VEGAPULS 51V…54V - Manual (Page 33)

VEGAPULS 51 V … 54 V 33
Mounting and installation - Measurement in standpipe
DN 50
ø50
Surge pipe with ball valve
When using a ball valve in a surge pipe, it is
possible to carry out maintenance and
service work without opening the vessel (e.g.
with liquid gas or toxic products).
The ball valve diameter must correspond to
the pipe size and provide a flush surface
when in the open position.
Surge pipe lockable with ball valve
Ball valve
Installation error in surge pipe
Missing ventilation hole
Pipe antenna systems must be provided with
a vent at the upper end of a surge pipe. A
missing hole causes wrong measurements.
Wrong polarization direction
When measuring in a surge pipe, especially
when there are holes for mixing, it is
important that the radar sensor is directed to
the rows of holes. The two rows of holes of
the surge pipe displaced by 180° must be in
one pane with the polarization direction of the
radar signals. The polarization direction is in
the pane of the type plate.
The surge pipe open to the bottom must
have a ventilation hole on top
The polarization direction is in one pane with
the type plate. The sensor must be directed
with the type plate to the rows of holes or the
openings
Correct
Wrong
Type plate