Bronkhorst CEM W-300B - Manual (Page 11)

BRONKHORST HIGH-TECH B.V.
2.11 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. Be sure that all setpoints are
at zero when doing so.
2.12 System purging
If corrosive or reactive fluids are used, purging with an inert gas is absolutely necessary, because if the tubing
has been exposed to air, introducing these fluids will tend to clog up or corrode the system due to a chemical
reaction with air or moist air.
Complete, long term purging is also required to remove such fluids from the system before exposing it to air.
It is preferred not to expose the system to air, when working with these corrosive fluids. Cycled purging and
evacuating is preferred.
2.13 Seals
Bronkhorst HIGH-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 is no liability for damages accruing from the use of this guide. The customer’s application demands
its own specific design or test evaluation for optimum reliability. So check if the seals are correct for your
process. However the CEM system has metal seals for all connections. Only the valve plunger is an
elastomer.
9.17.082 page 11