NOTE59
The materials of construction in the pumphead to drive interface area would only be wetted by the
fluid in the event of operating the pumphead to the point of failure, and the fluid being
incompatible with the pumphead internals in
"19.2.3.1 Materials of construction that have the
potential of being wetted when the tube or fluid contacting element fails" on the previous page
under a positive pressure on the
inlet
side of the pumphead.
NOTE60
The drive internal parts contain Aluminium. Some aggressive chemicals can react with Aluminium
to produce an explosive gas.
!
WARNING
Operating the pumphead to the point of failure may result in a flow of chemicals into the
pumphead to drive interface area, as a result of aggressive chemicals which are not
compatible with the internal pumphead materials.
Chemicals could attack the materials in this area and enter the drive. The internal parts of the
drive unit contain Aluminium which may react with some aggressive chemicals to form an
explosive gas.
If you are pumping a chemical that may react with Aluminium to form an explosive gas, do not
operate the pump to the point of pumphead failure. In addition, you must ensure the
chemicals being pumped are chemically compatible with the materials in the pumphead to
drive interface area: Drive casework, Drive casework seals, Drive shaft, Drive shaft seal.
In the event of a pumphead failure or a leak detection notification event. Stop the pump,
remove from service and follow the pumphead replacement procedure in
.
19 CHEMICAL COMPATIBILITY
210
