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Graco 8900 Proportioning System

Precise, Positive Displacement with Double-Acting Cylinders

The 8900 Proportioner uses fluid inlet pressure to continuously reciprocate two connected cylinders. This fluid pressure is usually provided by two pumps which supply consistent pressure to the proportioner cylinders.  As the major volume cylinder (base) and minor volume cylinder (catalyst) reciprocate, they positively displace the two material components on ratio to the outlet ports. Specially-sized hoses connect the proportioner to a choice of mixers to ensure ratio accuracy. Static mixers are incorporated into the system to deliver a homogeneous mix of base and catalyst.

Features and Benefits

  • Dependable, production-proven operation
  • Rugged, reliable heavy-duty components
  • Fixed or adjustable ratio versatility
  • Continuous, "on-demand" or adjustable shot-size dispensing
  • Modular system configurations for customizing to suit your needs

Key Applications

  • Polysulfide sealants for aerospace industry
  • Epoxies for product assembly

Key Materials

  • Polysulfide
  • Silicone
  • Urethane
  • Epoxy