• Block & bleed design allows pressure to be bled off without disturbing the
permanent piping installation, allowing quick and easy removal or
replacement of instruments
• 100% helium leak tested to 1 x 10-4 ml/s for performance and reliability
• Replaceable Acetal seat and straight through porting for bidirectional,
high capacity flow and easy roddable cleaning
• PCTFE or PEEK soft seat optional
• 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 packing optional
• 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)
• 0.090" bleed hole located on the bottom is controlled by a
1/4"-20 UNF-2A bleed screw