Bronkhorst Mini CORI-FLOW - Manual (Page 22)

BRONKHORST CORI-TECH B.V.
2.9 Pressure testing
Each CORI-FLOW is pressure tested to at least 1.5 times the working pressure of the process conditions
stipulated by the customer, with a minimum of 8 bara.
The tested pressure is stated on the flow meter/controller with a RED COLOURED sticker. Check test
pressure before installing in the line.
If the sticker is not available or the test pressure is incorrect, the instrument should not be mounted in the
process line and be returned to the factory.
Each instrument is helium leak tested to at least 2⋅10 -9 mbar l/s Helium outboard.
2.10 Supply pressure
Do not apply pressure until electrical connections are made. When applying pressure to the system, take care
to avoid pressure shocks in the system and increase pressure gradually, especially on high pressure units
incorporating a piston operated control valve.
Make sure in case of a controller that the used valve can withstand the system pressure.
Give special attention to the maximum delta pressure of the valve.
2.11 System purging
If explosive gases are to be used, purge the process with inert dry gas like Nitrogen, Argon etc. for at least 30
minutes at a high enough flow.
In systems with corrosive or reactive fluids, purging with an inert gas is absolutely necessary, before taking in
use.
Preventing chemical reactions inside the tubes or instrument as this will tend to clog up or corrode the system.
Complete purging is also required to remove such fluids from the system before exposing the system to air. It
is preferred not to expose the system to air, when working with these corrosive fluids.
2.12 Seals
Bronkhorst Cori-Tech B.V. has gathered a material compatibility chart from a number of sources believed to be
reliable.
However, it is a general guide only. Operating conditions may substantially change the accuracy of this guide.
Therefore there is no liability for damages occurring from the use of this guide.
The customer’s application will demand its own specific design or test evaluation for optimum reliability.
So check if the seals like O-rings and plunger are correct for the process.
2.13 Equipment storage
The equipment should be stored in its original packing in a cupboard warehouse or similar. Care should be
taken not to subject the equipment to excessive temperatures, humidity, vibrations or shocks.
page 22 9.17.050