Noshok
2170 Series 2-Valve Block & Bleed, Soft Seat Needle Valves

Key Features

  • 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
  • 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
  • 6,000 psi pressure rating @ 200 °F
  • Replaceable Delrin® 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 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)
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SPECIFICATIONS
MaterialsZinc-nickel plated steel, electropolished 316 stainless steel
Connections1/2" & 1/4" NPT 
Male-female & Female-female configurations available, right venting optional
Pressure ratings6,000 psi @ 200 °F
Orifice size0.187"
Flow coefficientCV 0.76
Steam seal & typeAll 316 stainless steel stems with FKM o-ring and PTFE back-up ring below the threads, PTFE packing optional
Length4" standard and 5-3/8" extended length available
OptionsPanel mountings, o-ring materials, handles, packings, regulating stem and stem tips

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