Trouble Shoot Spray Foam Pressures

Quick Guide to Troubleshooting Spray Foam Pressure

• If the A-Side Pressure Keeps Falling, then:
  • There is either a blackage on the B-Side at the Gun
    • B-side Screens
    • B-side Mixing Chamber
    • Additional less common issues include:
      • A-side gun O-rings are leaking
      • A-side proportioning pump packing’s are leaking
  • Or, there is a restriction on the A-side supply:
    • Machine Y Strainer
    • A-side Drum Pump
• If the B-side pressure keeps falling then:
  • Reverse the above
• Viscosity imbalance or cold material:
  • If pressures are slightly off but steady, and there is nothing wrong with your equipment, there may be a viscosity imbalance due to cold weather
  • The B-side material is thicker than the A-side material
  • Solutions:
    • Raise the B-side primary heaters 3-5 degrees higher than the A-side
    • Warm the drums to 77F
      • Do not directly apply heat to closed cell resin drums
      • The drum temperature has to be raised gradually, the best method is by storing it in a warm space and letting the surrounding air heat the drum slowly