Bronkhorst®
Instruction Manual MI Series Industrial mini CORI-FLOW™
9.17.120A
11
2.3.2
Location
For
gas applications
, mount the instrument in a location where condensate (if any) cannot accumulate inside the
instrument's media conduits.
In
liquid applications
, the presence of gas bubbles in the liquid can cause
measuring errors. In general, the instrument should be mounted in a pipe
segment where gas bubbles (if any) cannot accumulate. The image to the
right shows the preferable mounting locations.
·
The best location is a horizontal pipe segment or a segment where the fluid direction is upward.
·
Gas might accumulate in a horizontal segment if it is followed by a downward segment. Do NOT mount the
instrument in a location like this.
·
Mounting in a downward pipe segment with an open end is strongly dissuaded, especially if the pipe
diameter is 1/2" or more. Gravity might let the segment run empty; depending on the specific system
dimensions and the viscosity of the metered fluid, this effect might be stronger or weaker.
·
If the instrument is part of a closed fluid system, mounting the instrument in a downward pipe segment is
not preferable, but may be considered if other mounting locations are more problematic.
To minimize the risk of gas entrapment by cavitation, the preferred location to install a control valve is downstream from
the instrument, for a pump the preferred location is upstream.
2.3.3
Preventing resonance
·
If multiple mini CORI-FLOW™ instruments will be used in the same fluid system or close to each other, vibrations from
one instrument might interfere with the resonance frequency of another, e.g. through piping or a mounting frame.
·
Isolate instruments mechanically by mounting them on individual, rigid, stiff bases. Preferably, mount multiple
instruments parallel to each other, and use flexible piping.
2.3.4
Fluid connections
Flow direction
·
Install the mini CORI-FLOW™ in the process line, in accordance with the direction of the FLOW arrow on the
base of the instrument.
·
Tighten connections according to the instructions of the supplier of the fittings.
Fittings
Bronkhorst® mini CORI-FLOW™ meters/controllers can be fitted with different fitting types (e.g. compression or face-seal). For
leak tight installation, follow the guidelines of the supplier of the fittings. Special fitting types are available on request.
Check the fluid system for leaks before applying full operating pressure, especially when using hazardous media (e.g. toxic
or flammable).
After using the mini CORI-FLOW™ for the first time with low temperature media, tighten the fluid connections again in
order to prevent leakage.
2.3.5
Piping requirements
During the manufacturing process, the instrument has been tested with water. Despite the fact that it has been purged
thoroughly afterward, the instrument cannot be guaranteed to be absolutely free of water droplets upon delivery. For
applications where remaining water particles might cause undesired reactions, such as corrosion, Bronkhorst strongly
recommends performing an additional, adequate drying procedure.
For reliable performance, make sure the fluid stream is uncontaminated. If necessary, use filters to ensure a moisture, oil
and particle free gas stream. If back flow can occur, the use of a downstream filter and check valve is also recommended.
Select a suitable filter size, to prevent a too high pressure drop.
