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Noshok® 704-FFS block & bleed needle valve is part of the 700 series family. The 700 series valves have a soft seat and allow pressure to be bled off without disturbing the permanent piping installation. This feature allows quick and easy removal or replacement of instruments. They have a blow-out proof stem that provides a secondary stem seal in the full open position. All stems for the 700 series are 316 stainless steel and all stem threads are rolled for strength and ease of operation. Other features include a one-piece bonnet with a metal-to-metal seal to the valve body below the bonnet threads and a slotted spring pin to prevent accidental loosening.