A New Generation of Peristaltic Pump

The older generation of peristaltic pumps is not designed for the printer. These pumps come from the food processing, hospital, vending, and chemical industries. When modified to work in the pressroom, these older pumps spread life chewing their way through tubes and hoses.

Graymills Totally Tubular Pump is the first peristaltic pump engineered and built just for the needs of the flexo and gravure printer for handling inks, coatings and adhesives.

Designed for:

• Extended Tube Life
• Straight-Thru Flow - Bucket to Print Deck
• Adjustable Flow Rate
• Fully Reversible
• Electric or Air Motor
• Quick Tube Change
• Easy Clean-Up

Straight-Thru Design Eliminates Flow - Stoppers

Patent pending Straight-Thru Design eliminates tubes "pinch points" and potential kinks that slow the flow in bucket-to-deck setups. Unique thread pattern locks the tube in place eliminating "snaking" and the need for clamps. Graymills patent pending design permits ink station setup with peristaltic pumps.

Maximizes Tube Life by Minimizing Wear

Larger pump head allows use of a bigger, more durable tube, delivering desired flow at reduced speed. The lower the speed the greater the tube life. Operating at slower speeds with just two rollers, (instead of three or four), there are fewer compression cycles and less tube fatigue. Two polymer rollers minimize friction and wear. Fewer rollers cause less wear per revolution. Gear driven roller mechanism delivers essential torque for greater flow control at slower speeds. Minimized wear and extends tube life.

Precision Electronics and Gear Drive Deliver Adjustable Flow Control - Full Reversibility

• Electronic variable speed control on electric motor models permits accurate flow management without valves or bypasses. (Also available with variable speed air motor, inherently explosion-proof)
• Motor and flow are fully reversible for easy draining or flushing of system. Hesitation-type forward/reverse switch stops electric motor before reversing direction.
• Gear driven roller mechanism delivers essential torque at all speeds. Provides better flow control than direct-drive peristaltic pumps.

Quick Tube Change - Easy Cleanup

• Swivel-lock fasteners permit quick cover removal for tube changeovers without tools or loose parts.
• See-through Lexan TM housing safely encloses all moving parts, allows quick visual check of tube and operation.
• Short runs are most cost effective with Graymills Totally Tubular peristaltic pumps because they cleanup quickly by simply changing the tube or flushing. Quick turnarounds.

Peristaltic pumps offer advantages in the flexo and gravure pressroom. They are capable of handling light to heavy viscosity links, coatings and adhesives. They are self-priming and deliver nearly constant flow rates to varying height press decks. Peristaltic action develops low shear. And because these pumps are easy to clean with just the change of a tube or flushing, they support short runs with a quick turnaround.

No Contact - No Contamination
Tube-type pumps have the advantage of isolating the fluid from the pump - avoiding any contamination and making cleanup easy. Because there is no conditioning or mixing of the ink in the container by the pump, use of a mixer is recommended.

How a Peristaltic Pump Works
Peristaltic flow is created in a tube by rotating roller system alternately compressing and relaxing a section of the tubing. As the compressed section recovers its shape, suction is created, drawing in fluid, which is then pushed forward by the next advancing roller. Peristaltic pumps are non-siphoning because one roller is always squeezing the tube closed.

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