• 100% helium leak tested to 1 x 10-4 ml/s for performance and reliability
• Blow-out proof stem provides a secondary stem seal in the full
open position
• FKM o-ring seal and PTFE back-up ring below the stem threads to
protect from corrosion and galling; PTFE or Graphite packing optional
(certain NPT sizes only)
• All stem threads are rolled for strength and ease of operation
• One-piece bonnet with a metal-to-metal seal to the valve body below
the bonnet threads
• Slotted spring pin to prevent accidental loosening
• Vinyl dust cap for bonnet and stem (non-packing)