Noshok
2603/2703 & 2604/2704 Series 2-Valve Block & Bleed Manifold 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 static pressure transmitters, switches 
    or gauges to be removed without disturbing the permanent piping  installation
  • Block valve is located on the right and the bleed valve is located on top in 
    a 90° orientation, venting is to the left
  • 100% helium leak tested to 1 x 10-4 ml/s for guaranteed performance 
    and reliability
  • 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)
  • 2603/2604 Series hard seat valves have 10,000 psi pressure rating @ 200 °F
  • 2703/2704 Series soft tip valves have 6,000 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
  • 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 caps for bonnets and stems (non-packing)
  • 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
Materials Zinc-nickel plated steel, electropolished 316 stainless steel
Connections 2603/2703 Series 3/8" NPT
2604/2704 Series 1/2" NPT, right venting optional
Pressure ratings Hard Seat: 10,000 psi @ 200 °F
Soft Seat: 6,000 psi @ 200 °F
Orifice size 0.156"
Flow coefficient CV 0.44
Stem seal & type All 316 stainless steel stems with FKM o-ring and PTFE back-up ring below the threads, PTFE or Grafoil® packing optional
Options Panel mountings, o-ring materials, handles, packings, regulating stem and stem tips

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