Graco Inc.

Graco Fluid Automation F4-5 and F4-55  Meter, mix & dispense for Liquid Silicone Rubber (LSR)

High-precision technology for two-component LSR injection molding

Ideal for manufacturing in the following industries: medical, infant care, consumer products, automotive, industrial parts, wearables

Graco_LSR F4-5_1934

In the manufacturing of liquid silicone rubber products, precision is paramount. Material waste is an expensive problem and substandard products are an intolerable failure. Minimize both with the Graco Fluid Automation F4-5 and F4-55.

  • Unmatched precision for material savings
  • Consistent, automatic ratio control
  • Ease of startup
  • User-friendly controls
  • Conveniently small footprint

Model F4-5


Precise ratio control, minimal material waste

The F4-5 and F4-55 systems take the ability to meter material flow to an almost microscopic level. Its helical gear uses multiple gear teeth to measure flow in very small increments. The increased number of measurements offers more assurance the machine remains on-ratio.

The result: More precise mixing, a better end product and less wasted material.

Reactor 2 Control Drum level

Easier operation with Graco Control Architecture

The Graco Fluid Automation F4-5 and F4-55 systems feature intuitive user interfaces based on the Graco Control Architecture (GCA), a modular system of processing and control components. GCA makes maintenance and service easy, thanks to built-in troubleshooting tools.

Increased Precision
High-resolution ratio control offers more assurance the machine will remain on ratio

Better Color Control
Mix two additive streams at ratios ranging from 0.5 to 6%

Easy Set-up and Operation
Proprietary Graco Control Architecture (GCA) is user friendly, providing easier operation and troubleshooting

Maintains Material Integrity
Stainless steel components meet the standard for clean room applications to prevent contamination, and cure inhibition and discoloration of material

Less Material Waste
Individual pump drive cylinders and optional sensors allow for automatic ratio control, minimizing waste

Easy Maintenance
Quick-disconnect pump removal mechanism simplifies the cleaning process

Cleanroom Convenience
A smaller footprint and casters (optional on F4-55) allow for system movement and maintenance


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