Noshok
800/850 Series Bleed, Hard Seat & Soft Tip Needle Valves

Key Features

  • Bleed valves provide a convenient means to relieve process pressures 
    trapped between a shut off valve and the instrument
  • Uses the same bonnet assemblies of the 100/150 Series mini valves with 
    an integrated single threaded body for insertion in vent port
  • Soft tip valves feature a patented Delrin® non-rotating soft tip stem, and
    a back-up metal-to-metal seal (U.S. Patent 6,820,857)
  • 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
  • Available in zinc-nickel plated steel, electropolished stainless steel, and brass
  • FKM o-ring seal and PTFE back-up ring below the stem threads to protect
    from corrosion and galling; PTFE or Grafoil® (800 Series only) packing optional
  • All stems are 316 stainless steel
  • All stem threads are rolled for strength and ease of operation
  • 0.159" bleed port
  • Patented body-to-bonnet, metal-to-metal seal is designed to significantly 
    increase the pressure range of the valve (U.S. Patent 7,758,014)
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SPECIFICATIONS
MaterialsZinc-nickel plated steel, electropolished 
316 stainless steel, 360 brass
Connections1/4" & 1/2" NPT
Hard seat
pressure ratings
Brass: 6,000 psi @ 200 °F
Steel: 10,000 psi @ 200 °F
Stainless Steel: 10,000 psi @ 200 °F
Soft tip
pressure ratings
Brass: 3,000 psi @ 200 °F
Steel: 6,000 psi @ 200 °F
Stainless Steel: 6,000 psi @ 200 °F
Bleed port0.159"
Steam seal & typeAll 316 stainless steel stems with FKM o-ring and PTFE back-up ring below the threads, PTFE or Grafoil® (800 Series only) packing optional
OptionsPanel mountings, o-ring materials, handles, packings, regulating stem and stem tips

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