400 Series - Standard, Hard Seat Needle Valves Brochure

100% helium leak tested to 1 x 10-4 ml/s for guaranteed performance and reliability. 10,000 psi pressure rating @ 200 °F. 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 Grafoil® packing optional (certain NPT sizes only). All stems are 316 stainless steel. 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).