Edwards EXS Series Instruction Manual page 48

WARNING:
We recommend the use of water and diluted Loctite® 7840 or Loctite® Natural Blue®
when performing a solvent flush procedure. It is your responsibility to assess
whether the Loctite® 7840/Natural Blue® is compatible with the application. For
more information refer to the Loctite® MSDS and technical datasheet. The
manufacturer states that the Loctite® 7840 and Loctite® Natural Blue® are not
recommended for use in pure oxygen and/or oxygen rich systems and should not be
selected as a sealant for chlorine or other strong oxidizing materials.
For queries about the solvent compatibility, contact our applications specialists.
WARNING:
Hot steam and liquid will exit the pump during the solvent flush procedure. Ensure
that the exhaust is piped away safely and solvents are disposed of in accordance with
the local and national safety and environmental requirements.
CAUTION:
If an inert gas is used in place of atmospheric air for the DP clean purge gas, ensure it
is regulated to atmospheric pressure otherwise the DP clean process may not work
properly and may cause damage to the pump.
The high flow purge and solvent flush procedures are performed by a single assembly
which is supplied as an optional kit. The actuating valve is operated pneumatically.
Ensure that the pneumatic gas supply meets the specification given in
purge/solvent flush (option)
Use a 3/8 inch compression fitting (not supplied) to connect the pneumatic supply to the
dry pumping system. For the pump‑only systems, refer to
the pump only
The pneumatic regulator is pre-set to 50 ± 5 psig in the factory and does not need to be
adjusted. The pneumatic regulator is shown in
only systems, for the pump‑only systems.
To use an inert gas in place of atmospheric air as the DP clean purge gas, remove the air
filter and in its place connect up the inert gas supply. For pump‑only systems, refer to
Figure: DP clean assembly for the pump only
solvent flush (option)
flows.
When only performing a high flow purge procedure, a solvent suction pipe will not be
needed. When performing a solvent flush, fit a solvent suction pipe only when ready to
perform the DP clean procedure. For pump‑only systems, refer to
assembly for the pump only
A41870880_A
A41870880_A - Installation
on page 23.
systems.
on page 23 for information about fittings and typical purge gas
systems.
Page 48
Figure: DP clean assembly for
Figure: DP clean assembly for the pump
systems. Refer to DP clean high flow purge/
Figure: DP clean
07/2021 - ©Edwards Limited
DP clean high flow