The PTFE envelope is made of TFM™ 1600 with an inner diffusion barrier (3 mm wide) and a graphite insert in SIGRAFLEX® Email (3 mm thick). Leading enamel flange manufacturers recommend this seal up to DN 250 nominal width upward. Where widths are greater the use of sealing system IDT Profile ED30 6.5 mm is recommended for its greater resilience.
*Prices are pre-tax. They exclude delivery charges and customs duties and do not include additional charges for installation or activation options. Prices are indicative only and may vary by country, with changes to the cost of raw materials and exchange rates.