On the 3rd of November 2017, the Energy Institute issued EI 1583 7th edition, which supersedes all earlier EI 1583 editions, with immediate effect. You may download the JIG Bulletin on this subject here.
Please note that Parker Velcon’s CDF “P” Series (eg. CDF-230P) complies with the new EI 1583 7th edition requirements and end-users may continue to use these 2″ elements.
EI 1583 7th Edition