Bronkhorst®
Instruction Manual EL-FLOW® Prestige
9.17.084N
11
2
Starting up
2.1
Functional properties
Before installing the EL-FLOW® Prestige, check the serial number label on the rear side
of the instrument to see if the functional properties match your requirements:
·
Flow rate
·
Media to be used in the instrument
·
Input and output signal (see also section
·
Upstream and downstream pressure(s)
·
Operating temperature
·
Valve type (NC = Normally Closed, NO = Normally Open)
2.2
Operating conditions
Test pressure
Bronkhorst® instruments are pressure tested to at least 1.5 times the specified operating pressure and
outboard leak tested to at least 2 * 10
-9
mbar l/s Helium.
·
The test pressure is specified on the device with a red label; if this label is missing or if the test pressure is insufficient, the
device must not be used and should be returned to the factory.
·
Before installation, make sure that the pressure rating is within the limits of the normal process conditions and that the
tested pressure is in accordance with the safety factor of your application.
·
Disassembling the device and/or replacing parts will invalidate the test pressure and leak test specification.
Sealing material compatibility
The EL-FLOW® Prestige is fitted with specific sealing material(s), compatible with the media specified at ordering time. See
section
Sealing material compatibility
for a compatibility list for the most commonly used media.
Rapid gas decompression / explosive decompression
For instruments used above 10 barg:
Bronkhorst recommends a maximum decompression rate of 70 bar/min, according NACE TM0297.
Exceeding this rate can have negative influence on the lifetime of the sealing materials.
Ambient conditions
EL-FLOW® Prestige
instruments are suitable for use in conditions between -10 and 70 °C and relative humidity of 10 to 90 %
RH, unless specified otherwise. Please note that
EL-FLOW® Prestige
instruments have an ingress protection of IP-40,
implying that the housing and electrical connection do not offer any protection against moist environments.
Make sure that process gases do not condensate in the instrument due to (changing) environmental conditions, condensed
process fluids may seriously harm the instrument's functionality! E.g. do not use moist air as process gas at low
temperatures.
2.3
Mounting
For optimal performance, observe the following guidelines:
·
Preferably, mount the EL-FLOW® Prestige in an upright position, especially if the operating pressure is higher than 10
bar.
·
If the instrument is mounted in a position where the flow is directed upwards or downwards,
recommended.
·
Avoid installation in close proximity of mechanical vibration and/or heat sources.
·
Use the equipment in an environment with a stable ambient pressure and temperature.
For stable fixation, the bottom of the instrument base is fitted with mounting holes. See the dimensional drawing for the
exact locations.