KROHNE DK 46 I-DK 47 I EN - Manual (Page 13)

INSTALLATION
3
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DK46I - DK47I
www.krohne.com 08/2008 • 4000360001 MA DK46I-47I-R01-en
3.3 Installation requirements
3.3.1 Installing in the pipeline
3.4 Start-up
CAUTION!
When installing the flowmeter in the pipeline please observe the following points:
• The variable area flowmeter has to be installed vertically (float measuring principle), flow
direction from bottom to top.
For installation recommendations please also refer to the Directive VDI/VDE 3513, Sheet 3.
• Before installing the flowmeter, blow or flush out the pipeline leading to the flowmeter.
• Pipelines for gas flow are to be dried before the flowmeter is installed.
• Use connectors appropriate to the flowmeter version for the connection.
• Align the pipes axially with the bolt holes on the flowmeter without incurring stresses.
• If necessary, support the pipeline on both sides of the flowmeter in order to prevent vibration
from being transferred to the flowmeter.
• Do not lay signal cables directly next to cables for the power supply.
CAUTION!
When starting up the flowmeter, the following points must be observed:
• Compare the actual operating pressure and the process temperature of the system with the
specifications on the nameplate (PS and TS); these limits must not be exceeded.
• Make sure materials are compatible.
• Close the needle valve at the flowmeters.
• Slowly open the shut-off valve upstream and downstream of the flowmeter.
• When measuring liquids, vent the pipes carefully.
• When measuring gases, increase pressure slowly.
• void float impact (e.g. caused by solenoid valves), as this is likely to damage the measuring
section or float.
• Open needle valve at the flowmeters and set the required flow rate.
• The top edge of the float marks the reading line for flow values:
Figure 3-1: Reading edge
1 Reading edge
2 Dk46I, DK47I - floatform ball
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