Virtually zero emissions
September 1st 2004 Third party tests on James Walkers Supagraf Premier valve stem packing have shown it to be a technically superior fugitive emissions control product. Emissions levels around the valve stem were so low that they challenged the sensitivity of the helium mass spectrometer used to measure the leak rate.
In a test with a 4-inch gate valve, Supagraf Premier achieved a Class A rating with helium, at valve body temperatures from ambient to 450C. This confirms that Supagraf Premier is virtually a zero emissions product, as it would be impossible to measure this level of leakage on site, explained Andrew Goulding of the company. Supagraf Premier is an easy to fit, length form valve packing that makes economic and environmental sense. We also supply it as pre-formed rings and sets. More articles from James Walker SPS Ltd: | 
