The Research
The standard ASTM D6284 test for rubber properties was conducted
on NSF-certified elastomeric compounds, including existing Parker
formulations, new Parker chloramine-resistant formulations, and competitor
formulations. A variety of samples were placed in water, containing chloramine
as 50 ppm total residual chlorine. The water was kept at a constant
temperature of 70°C and was refreshed per the ASTM standard.
The Results
Parker’s new chloramine-resistant formulations show no sign of
degradation and minimal swell after eight weeks of constant exposure
to the chloramine solution. Other tested materials show severe
degradation and swelling with the same exposure
The Takeaway
Parker’s new chloramine-resistant materials, both standard and lubricated,
offer improved resistance to chloramine degradation and swelling over
time. Based on the test results, Parker’s chloramine-resistant materials
will provide significantly longer useful seal life compared to all other tested
materials. This can reduce potential warranty claims, when used as seals
in plumbing fixtures and potable water handling equipment.
The new Parker chloramine-resistant materials are tested and certified by
NSF International for potable water applications and are available in both
standard and custom shapes.