Series 450 XT Snuff Back Valve

Nordson EFD has designed and manufactured an innovative dispense valve specifically for two-component urethanes. Since two-component urethanes are moisture sensitive, any contact with air can cure the material, locking up the dispense valve. This production proven design eliminates exposure of wetted shafts to air.


  • Uses same manifold and ergonomic handle as standard Series 450 valve.
  • A thicker tie plate increases the distance between the lip seals to be more than the stroke length, resulting in extended seal life and less down time.
  • Divorced air cylinder keeps isocyanate from reaching the air cylinder should the seals fail .


  • Easy to Clean: If cross contamination occurs, the manifold can be removed and cleaned without disassembly of the valve body
  • Optional Stainless Steel Valve: Recommended for corrosive acrylics or epoxies
  • Flush Valve Manifold: For cleaning the mixing nozzle with air or solvent. A check valve is threaded into the side of the manifold.
  • Lubricated and Hard Coated Shafts: Lubricated with Nordson EFD Autogrease for moisture sensitive adhesives and hardcoated to resist abrasive adhesives
  • Optional Polytuff, PTFE, Viton®, and EP Seals: For varying chemical formulations and abrasive conditions.
  • Optional Night Cap & Ratio Check Cap: Available for 1:1 ratio manifolds


  • Weight (Aluminum Valve and Manifold): 1.6 lbs (0.7 kg)
  • Weight (Stainless Steel Valve and Manifold): 2.5 lbs (1.1 kg)
  • Pressure Rating: 3,500 psi (240 bar)

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