KROHNE H250 M9 ES EN - Manual (Page 14)

3
INSTALLATION
14
H250
www.krohne.com 09/2012 - 4002294201 MA H250 KINAX R01 en
3.4 Installation conditions
3.4.1 Magnetic filters
The use of magnetic filters is recommended when the medium contains particles which can be
influenced magnetically. The magnetic filter is to be installed in the flow direction upstream of
the flowmeter. Bar magnets are positioned helically in the filter to provide optimal efficiency at
low pressure loss. All of the magnets are coated individually with PTFE to protect against
corrosion. Material: 1.4571
CAUTION!
When installing the device in the piping, the following points must be observed:
• The variable area flowmeter must be installed vertically (measuring principle). Flow direction
from bottom to top. For installation recommendations please refer also to directive VDI/VDE
3513, sheet 3.
• A straight unimpeded inlet run of ≥ 5x DN upstream of the device and a straight outlet run of
≥ 3x DN downstream of the device are recommended.
• Screws, bolts and gaskets are to be provided by the customer and must be selected in
accordance with the pressure rating of the connection or the operating pressure.
• The inside diameter of the flange deviates from the standard dimensions. Flange seal
standard DIN 2690 can be applied without any limitation.
• Align the gaskets. Tighten the nuts with the tightening torques of the appropriate pressure
rating.
For devices with PTFE liner or ceramic liner and PTFE raised faces, refer to chapter
"Tightening torques".
• Control devices are to be positioned downstream of the measuring device.
• Shutoff devices are preferably to be positioned upstream of the measuring device.
• Before connecting, blow or flush out the pipes leading to the device.
• Pipes for gas flow need to be dried before the device is installed.
• Use connectors suitable for the particular device version.
• Align the pipes centrically with the connection bores on the measuring device so they are free
of stresses.
• If necessary, the piping has to be supported to reduce the vibrations transmitted to the
measuring device.
• Do not lay signal cables directly next to cables for the power supply.
Magnetic filters
1 Type F - fitting part with flange - overall length 100 mm
2 Type FS - fitting part without flange - overall length 50 mm
MA_H250_Sonder_Kinax_R01_en_4002294201_PRT.book Page 14 Monday, September 17, 2012 11:13 AM