Fire-safe testing of NAF Duball DL successfully completed

The NAF Duball DL is a high performance, full bore, ball valve, targeting the need for automated ball valves in the process industry. The completion of the testing means that the valve is now available in a full range of carbon and stainless steels versions tested according to the most widely accepted and updated fire-safe test standards; API 607, 6th Edition and ISO 10497:2010