Positive Displacement Pump
Automatic Speed Control
Three Tubing Sizes Available
Ideal for Most Liquid Color Applications
Maguire MPA peristaltic pumps are best suited for accurate metering at the very low rates (up to 3 gallons) typical of liquid coloring applications.
High rate extruders requiring higher rates of liquid color may be better served by our Model MPA-3-HO (3-5 gallons/hour) or Model MDA Drum Pump (up to 45 gallons/hour).
6-Roller Pump Head
6-roller pumps utilize six hardened dowel pins retained by a plastic cage and held firmly against the inside surface of the pump head housing by a flexible elastomeric center drive roller. A tube compression groove, machined into the pump head housing, provides a path for the pump tube.
Because tube compression is determined by the depth of this groove, tolerances will not change over time, and priming and pumping accuracy is never lost. In this patented design there are no bearings. The rolling dowel pins do not wear out. A clear viewing window allows observation of the roller and tubing.
How MPA Pumps Work
The Maguire standard Digital Controller provides the precise motor speed regulation and metering control necessary to assure absolute accuracy of color usage. Because metering rate is directly related to motor shaft rotation, accuracy is obtained by precisely controlling drive motor rotation.
The controller divides each full motor rotation into 106 increments, each increment representing a small fraction of a gram of color being carefully measured. The controller contains a 1/27 HP DC permanent magnet motor with variable speed control. In the standard configuration the motor is close-coupled to a heavy duty gearbox with a reduction ratio of 53:1.
As the motor turns, a “hall effect” pickup device on the motor send 2 pulses per revolution to the microprocessor. The gearbox ratio of 53:1 means that 106 pulses (2 x 53) are received for every single revolution of the motor shaft.
|Easy Maintenance and Cleaning
|Model||Tubing I.D.||Maximum RPMs||Flow/hr @ 10 lb/gal||Minimum Dispense|
|Min (g)||Max (lb)||(One Cycle)|
|MPA-18-G||1/8″ (green)||30||36||2.9||.006 grams|
|MPA-34-G||1/8″ (green)||56||36||5.4||.006 grams|
|MPA-34-R||3/16″ (red)||56||81||11.6||.013 grams|
|MPA-51-G||1/8″ (green)||90||36||8.6||.006 grams|
|MPA-51-R||3/16″ (red)||90||81||18.0||.013 grams|
|MPA-51-C||1/4″ (clear)||90||138||30.0||.022 grams|