- Combines isolating and venting in a single valve, eliminating the need for
tubing and fittings - Block valve isolates the downstream process fluids, and the bleed valve
exhausts upstream fluids enabling instruments to be removed without
disturbing the permanent piping installation on the bottom - The 1/4" NPT vent plug is located 90° to the left and may be removed and replaced with exhaust piping to direct the fluids to a safe location
- 100% helium leak tested to 1 x 10-4 ml/s for guaranteed performance
and reliability - 10,000 psi hard seat 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
- 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)
* Note: If a packing option is chosen, maximum pressure rating is 6,000 PSI. Refer to the "Pressure vs. Temperature: Packing Style with Compatible Fluid" .pdf on the right-hand side of this page.
All NOSHOK valve products conform to the MSS SP-99 instrument valves standards, and valves supplied with packing
also conform to MSS SP-132 compression packing systems for instrument valves standard.
