6.15. High flow purge and solvent flush set up
WARNING:
By default the DP clean high flow purge and solvent flush assembly draws the
atmospheric air into the dry pumping system. If air is not compatible with your
process then nitrogen or another inert gas may be used. It is your responsibility
to assess whether the DP clean purge gas is compatible with the process.
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 DP clean high flow purge/solvent flush (option) on page
26.
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 Figure: DP clean
assembly for the pump only systems.
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 Figure: DP clean
assembly for the pump 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
systems. Refer to DP clean high flow purge/solvent flush (option) on page 26 for
information about fittings and typical purge gas flows.
Installation
07/2021 - ©Atlas CopcoPage 1001950840208_A
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