100% helium leak tested to 1 x 10-4 ml/s for guaranteed performance and reliability.
Mini Valve, Hard Seat, 1/4 NPT Male - 1/4 NPT Female, Steel, 0.172" Orifice, PTFE Packing, Non-Rotating V Tip Stem, Panel Mount (2 nuts), 1" Round Knu FKM o-ring seal and PTFE back-up ring below the stem threads to protect from corrosion and galling; PTFE or Graphite packing optional. Compact size valve built for maximum durability and robust performance in the toughest applications.