Bronkhorst®
Instruction Manual EL-FLOW® Select
9.17.099J
13
2
Installation
2.1
Functional properties
Before installing the
EL-FLOW® Select
, check the serial number label to see if the functional
properties match your requirements:
·
Flow rate
·
Media to be used in the instrument
·
Upstream and downstream pressure(s)
·
Operating temperature
·
Valve type (N.C. - Normally Closed / N.O. - Normally Open)
·
Input and output signal
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 stated on a red label on the device; 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 and/or replacing fluid system related parts of the device will invalidate the test pressure and leak test
specification.
Rapid gas decompression / explosive decompression
For instruments used above 10 bar (g):
Bronkhorst recommends a maximum decompression rate of 70 bar/min, according to NACE TM0297.
Exceeding this rate can have negative influence on the lifetime of the sealing materials.
Ambient conditions
Make sure that process gases do not condensate in the instrument due to (changing) ambient conditions, as this may
seriously harm the instrument's functionality! 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® Select 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 threaded mounting holes. Consult the
