KROHNE OPTIBAR DP 7060 C EN - Manual (Page 21)

INSTALLATION
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OPTIBAR DP 7060 C
www.krohne.com 04/2014 - 4003292001 - MA OPTIBAR DP 7060 C R01 en
3.7.5 Manifolds
Manifolds allow for easy installation and commissioning of the transmitter. They separate the
device from the process side and ensure simple control of the measuring point. They are
available as 3-way and 5-way versions. The integrated outlet valve allows pressure equalization
between the high (H) and low (L) pressure side during commissioning. With the manifold, it is
possible to disassemble the differential pressure transmitter without interrupting the process.
This means higher system availability and even simpler commissioning or maintenance
purposes. The 3-way manifold with double-sided flange adapters allows a mechanically robust
connection between the differential pressure transmitter and, for example, the impulse lines or
the flange adapters of a averaging pitot tube. With a 5-way manifold, two additional valves allow
to blow out of the impulse lines and the calibration of the differential pressure transmitter in
place.
3.7.6 Primary element
Primary elements, such as averaging pitot tubes, orifice plates or venturis are designed for
certain line sizes and flow conditions. Therefore, prior to installation, the line size and pressure
rating has to be checked and the measuring point number compared. For detailed instructions
on installing a primary element refer to DIN EN ISO 5167.
3.7.7 Pressure connection with impulse line
Please review the following information for pressure connection with impulse line:
• Select the shortest impulse line possible and install without sharp bends.
• Avoid material deposits and blockages in the impulse line. Accordingly, install the impulse
lines so that such occurrences are impossible. Do not exceed a slope of approx. 8% in the
piping.
• Ensure that the impulse line flows freely before installation and rinse with compressed air or,
even better, with the product itself.
• When measuring liquid, the impulse line must be completely purged of air.
• Run the impulse line so that trapped air (when measuring liquids) or condensate (when
measuring gas) can flow back into the process.
• Hot steam must not enter the process connection (the over temperature will destroy the
device). To avoid this situation, a suitable water trap (such as a syphon filled with water prior
to installation) can be installed upstream from the measuring device.
• All connections must be tight and fixed properly.
• The process lines must be installed so that the medium cannot be blown out of the measuring
chambers.
3.7.8 Vibrations
In case of strong vibrations at the measuring point, the device should be mounted via impulse
lines in a calm place.
3.7.9 Temperature limits
Higher process temperatures often mean also higher ambient temperatures for electronics and
connection cables. Make sure that the upper temperature limits for the environment of the
electronics housing and connection cable are not exceeded. For further information refer to
Technical data on page 63.
.book Page 21 Friday, May 2, 2014 10:25 AM