Flowserve Corporation announced that the Flowserve NAF Duball DL valve product range now includes certified fire-safe design and Pressure Nominal (PN) rated versions.

The fire safe design is the latest addition to the existing full bore, NAF Duball DL valve product range. The fire safe design was successfully tested and certified according to API 607, 6th Edition, and ISO 10947:2010. These standards are the most updated and widely accepted in the market. The tests were completed for both soft and metal seated versions and have been certified by Lloyd s Register.

Further enhancements of the NAF Duball DL product range include the release of PN-rated versions. The DL is now available in the PN10, PN16, PN25 and PN40 pressure ratings in addition to the ANSI class 150 and 300 pressure ratings

The NAF Duball DL ball valve can be used in automated on/off applications and is equally suitable for a wide range of control applications. The ball valve s spring-loaded packing remains tight for a greater number of cycles, virtually eliminating the need for manual retightening of the packing. The mechanical backlash is minimized by the uniquely designed long connection between the ball and stem which is especially important in control applications.

With this product line expansion, Flowserve is widening the product range to better serve its customers needs and enable them to meet the highest safety standards.