19.2 How to check chemical compatibility
Follow the individual procedures to check chemical compatibility for each of the 3 scenarios:
19.2.1 Scenario 1: Fluid Path (wetted by the pumped fluid in
normal use)
Check the chemical compatibility of scenario 1: Fluid Path (wetted by the pumped fluid in normal use) using this
procedure:
Procedure
1. Navigate to
https://www.wmfts.com/en/support/chemical-compatibility-guide/
2. Read the information on the page
3. Search for the fluid or select from the list
4. Check the fluid is compatible using steps 5 to 7 below:
5. Check the Materials of
construction of the
pumphead: Fluid path
The Watson-Marlow chemical compatibility guide provides a combined
check
of the three items of the pumphead: fluid path
l
Tube or fluid contacting element inside the pumphead
l
Pumphead ports
l
The pre-installed pumphead port seals
For qdos 30 models this is based on FKM - Where EPDM seals are to be
used instead, EPDM must be checked for compatibility instead.
NOTE57
The combined check may be verified using the individual materials of construction pumphead: fluid
path table provided after this procedure (
"19.2.1.1 Materials of construction - Pumphead: Fluid
).
Procedure
6. Check the materials of
construction of the
Watson-Marlow hydraulic
connectors.
Watson-Marlow Hydraulic connectors are available in Polypropylene or
PVDF.
Using the chemical compatibility guide choose a connection material
which is both compatible and available in the size required with the
pumped fluid.
19 CHEMICAL COMPATIBILITY
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